WO2016174009A1

WO2016174009A1 - Use of a composition made from silylated polymers as jointing mortar for a surface coating

Info

Publication number: WO2016174009A1
Application number: PCT/EP2016/059244
Authority: WO
Inventors: Jérémy BECQUET; Liam Devlin; Quentin Guerineau
Original assignee: Bostik Sa
Priority date: 2015-04-28
Filing date: 2016-04-26
Publication date: 2016-11-03
Also published as: FR3035662A1; FR3035662B1

Abstract

The present invention concerns the use of a joint mortar composition comprising at least one silylated polymer comprising at least one alkoxysilane group, at least one catalyst and at least one filler for producing tile joints or joints between LVT's (Luxurious Vinyl Tiles).

Description

USE OF A COMPOSITION BASED ON SILYLATED POLYMERS AS A JOINING MORTAR FOR A COATING OF

SURFACE FIELD OF THE INVENTION

The present invention relates to the use of a composition as a grouting mortar, also called joint mortar or mortar, comprising at least one silylated polymer comprising at least one alkoxysilane group, at least one catalyst and at least one filler to achieve joints on a surface coating, especially tile tile joints or joints between LVT ("Luxurious Vinyl Tile" or English "high-end vinyl") strips.

BACKGROUND

In the installation of tile tiles, such as ceramic tiles, or LVT boards, the tiles or boards being joined edge-to-edge with spaces between said tiles or said boards, it is necessary to fill the interstices between the tiles. adjacent tiles with a bonding material commonly referred to as a joint mortar.

The sealant compositions currently used are either based on an aqueous dispersion, such as an acrylic dispersion, acrylic styrene or polyurethane dispersion, or based on epoxy or based on Portland or Aluminous cement. For proper use, joint mortars must have certain properties, such as ease of preparation of the product (ready-to-use or mixing composition), good workability, good stain resistance, good resistance to ultraviolet light ( UV), uniform color appearance, good chemical resistance and easy cleaning of tiles or planks after jointing.

Maneuverability facilitates spreading of the joint mortar composition (also called "grout") between the edges of adjacent tiles or boards without creating gaps or voids. Handling is a very important point of the joint because it directly affects the ease of implementation of the compositions (or products) and those with great maneuverability are more profitable because they require less work to perform a grout work. In addition, an easier implementation of the product is claimed by the users.

The joint stain resistance property is also important because tiles, such as ceramic tiles, or boards are used both functionally and ornamentally. Thus, the permanent tasks on the joints detract from the decorative aspect of the coating. Stain resistance (eg wine, ketchup, etc.) refers to the fact that the color of the joint is not affected for example by the presence of wine or ketchup on the joint.

The ease of cleaning is another important property for the user. Indeed, the joint mortar composition is applied after the ceramic tiles for example have been fixed on a support (floor or wall for example). During the grouting operation, a portion of the excess sealant composition adheres to the tiles or blades to form a surface film and this excess must be removed from the tile or blades without damaging the joints that come just to be done. Cleaning is the most common complaint of tilers (users). However, as indicated above, the tile-based or LVT tile-based coatings are also used for decorative purposes, so it is essential to be able to remove the excess sealant composition present on the tiles or the slats.

Chemical resistance is another important property because seals are frequently exposed to cleaning or cleaning products such as bleach or anti-lime acids. The cement-based joints and ready-to-use joints currently used are not very resistant to chemicals.

US 2013/0102713 discloses a sealant composition based on an aqueous acrylic dispersion. US 8,263,694 discloses a sealant composition based on an aqueous polyurethane dispersion. Such sealant mortar compositions do not exhibit excellent chemical resistance. In addition, when applying the joint mortar composition, there is a high risk of cracking during drying of the aqueous composition then requiring at least a second application of the joint mortar composition. It has further been found that aqueous dispersion sealants are not easy to clean.

WO 2004/063246 discloses an epoxy resin joint mortar composition. Such compositions are two-component compositions in which the resin is conditioned on the one hand and the hardener is conditioned on the other hand, the mixing of the two components being carried out just prior to the application of the sealant composition. The use of such a composition is therefore more restrictive than single-component sealant mortar compositions. In addition, the epoxy-based seals do not exhibit a durable coloration over time, in particular because they are sensitive to UV and therefore tend to turn yellow. In addition, the epoxy is classified as toxic to the environment and allergenic, because of epoxy but also because of the isocyanates present. It has also been found that epoxy resin sealants are not easy to clean.

Another type of sealant mortar compositions are cementitious compositions. Like epoxy-based compositions, cement-based compositions are two-component compositions in which the cement is conditioned on the one hand and the water must be provided on the other hand because during the application of the Joint mortar composition, the cement must be previously mixed with water. In addition, the cement-based joints do not have excellent chemical resistance or excellent stain resistance. Indeed, their porous nature makes them absorb stains and products that can be used to clean said joints. In addition, as with the aqueous dispersion seals, when applying the cementitious joint mortar composition, there is a high risk of cracking (also called "drying shrinkage" phenomenon) when drying the aqueous composition then requiring at least a second application of the sealant composition. In addition, the cement is classified as corrosive.

The object of the present invention is to provide a sealant mortar composition for overcoming the above-described disadvantages of currently used sealant mortar compositions.

SUMMARY OF THE INVENTION

A first object of the present invention relates to the use of a composition comprising at least one silylated polymer comprising at least one alkoxysilane group, at least one catalyst and at least one filler as a grouting mortar.

The present invention also proposes the use of a composition comprising at least one silylated polymer comprising at least one alkoxysilane group, at least one catalyst and at least one filler for producing seals of a surface coating.

Preferably, the gasket is a tile joint or a joint between blades

LVT.

According to one embodiment, the silylated polymer comprising at least one alkoxysilane group is chosen from silylated polyethers comprising at least one alkoxysilane group and silylated polyurethanes containing at least one alkoxysilane group, alone or as a mixture.

According to one embodiment, the silylated polymer comprising at least one alkoxysilane group is chosen from the polymers of formulas (II), (III), (IVa), (IVb) or (V) below: (R ⁵ O) ₃ - _P (R ⁴ ) p Si - R ³ - NH - C - [OR ² ] _n O - C - NH - R ¹ - NH - C - [OR ² ] _n O - C - NH - R ³ - Si (R ⁴ ) p (OR ⁵ ) ₃ .

(H)

(R ⁵ 0) ₃ . _p (R ⁴ ) _p Si - R ³ - [OR ² ] _n - O - R ³ - Si (R ⁴ ) _p (OR ⁵ ) ₃ . _p

(ΠΙ)

(R ⁴ ) _p - Si (OR ⁵ ) ₃

(IVa) (R ⁴ ) _p - Si (OR ⁵ ) ₃

IVb)

(R ⁵ 0) ₃ .p (R ⁴ ) _p Si - R ³ - R - Si (R) p (OR) ₃ . _p

(V) in formulas (II), (III), (IVa), (IVb) and (V):

R ¹ represents a divalent hydrocarbon radical comprising from 5 to 15 carbon atoms which may be aromatic or aliphatic, linear, branched or cyclic,

R ³ represents a linear or branched divalent alkylene radical comprising

1 to 6 carbon atoms,

R ² represents a divalent linear or branched alkylene radical comprising

2 to 4 carbon atoms,

R ⁴ and R ⁵ , which are identical or different, each represent a linear or branched alkyl radical comprising from 1 to 4 carbon atoms,

R ⁶ represents a hydrogen atom, a phenyl radical or a linear, branched or cyclic alkyl radical comprising from 1 to 6 carbon atoms, n is an integer such that the average molar mass of the polyether block of formula - [OR ² ] _n - ranges from 300 g / mol to 40000 g / mol,

- mi is zero or an integer such that the average molar mass of the polymer ranges from 500 g / mol to 50000 g / mol,

m is an integer other than zero such that the average molar mass of the polymer ranges from 500 g / mol to 50000 g / mol,

p is an integer equal to 0, 1 or 2,

q, r and s are integers equal to 0, 1 or 3 such that the sum q + r + s is equal to 3,

t is an integer equal to 0, 1 or 2,

u is an integer ranging from 0 to 8.

Preferably, the composition comprises at least one polymer of formula (IVa) or at least one polymer of formula (II), (III) or (V) in combination with a silicone resin of formula (VI):

in which :

Qi and Q ₂ represent, independently of one another, a radical chosen from a hydrogen atom, a linear or branched alkyl group comprising from 1 to 30 carbon atoms, an alkenyl group comprising from 2 to 30 carbon atoms, carbon, a substituted or unsubstituted aromatic group comprising from 6 to 30 carbon atoms, an allyl group comprising from 3 to 30 carbon atoms, a substituted or unsubstituted cyclic aliphatic group comprising from 3 to 30 carbon atoms, an acyl group comprising from 1 to 30 carbon atoms, a primary, secondary or tertiary amine functional group comprising from 1 to 30 carbon atoms or an acetate function comprising from 1 to 30 carbon atoms,

x1 represents an integer greater than or equal to 5, preferably ranging from 5 to 20.

According to one embodiment, the filler is chosen from sand, calcium carbonate, glass beads, glass, quartz, barite, alumina, mica, talc and preferably from sand, calcium carbonate and glass beads.

According to one embodiment, the composition comprises at least two different charges. Preferably, said at least two fillers are chosen from sand, calcium carbonate, glass beads, glass, quartz, barite, alumina, mica, talc and preferably from sand, calcium carbonate and glass beads.

According to one embodiment, the sand is a colored sand.

According to one embodiment of the invention, the composition comprises:

from 3 to 30% by weight, preferably from 8 to 30% by weight, more preferably from 12 to 24% by weight, of at least one silylated polymer comprising at least one alkoxysilane group,

from 0.1 to 1% by weight, preferably from 0.3 to 0.5% by weight, of at least one catalyst,

from 5 to 85% by weight, preferably from 10 to 80% by weight, of at least one filler,

relative to the total weight of the joint mortar composition.

According to one embodiment of the invention, the composition further comprises at least one additive chosen from plasticizers, solvents, pigments, moisture absorbers, UV stabilizers, flakes, fluorescent materials or luminescent materials. .

According to one embodiment of the invention, the composition comprises:

from 0.1 to 20% by weight, preferably from 0.5 to 15% by weight, of at least one other additive chosen from plasticizers, solvents, in particular volatile solvents, pigments, Moisture, UV stabilizers, flakes, fluorescent materials or luminescent materials, based on the total weight of the joint mortar composition. Another object of the present invention is a surface coating comprising tiles or blades, characterized in that the joints between two Tiles or two adjacent blades are made using a joint mortar composition as defined in the present invention.

The invention also relates to a method of manufacturing a surface coating comprising tiles or blades separated from each other by at least one gap, said method comprising the steps of:

a) applying a joint mortar composition as defined in the present invention in said gap,

b) hardening of the joint mortar composition.

The present invention makes it possible to provide a single-component sealant mortar composition, making it possible to dispense with an additional mixing step before application. It can be packaged in a form that makes it directly ready for use by a user.

The sealant mortar composition according to the invention is not or only slightly toxic, in particular the components of the composition are not classified as corrosive, irritant or allergenic or classified as dangerous for the environment.

The sealant mortar composition according to the invention comprises a silylated polymer-based binder which cures at atmospheric humidity to 100% solids. Thus, the drying removal phenomenon does not appear. As described above, this drying shrinkage phenomenon can occur when drying an aqueous binder composition, such as aqueous dispersant binders or cementitious binders which require mixing with water before application. Due to the evaporation of the water during drying, cracks may appear in the joint, requiring then to renew the application.

The seal obtained after application and drying of the sealant mortar composition according to the invention has a durable coloration over time, in particular thanks to an excellent resistance to UV. Moreover, the use of colored sand makes it possible to overcome use of pigment. It has indeed been found that the use of pigment makes epoxy-based mortar compositions or aqueous dispersion difficult to remove tiles or blades before drying, in the case where the composition is present on the tiles of tiling or LVT blades.

The sealant mortar composition according to the invention has excellent chemical and stain resistance.

In addition, the sealant mortar composition according to the invention is easy to remove tiles or blades after jointing said tiles or said blades (application of the joint mortar composition), in case of the composition of mortar would be deposited on the tile or the blade. It is indeed very important to be able to remove this joint mortar composition from the decorative surface of the tiles or blades to obtain a better aesthetic appearance of the tiles or blades.

DETAILED DESCRIPTION OF THE EMBODIMENTS OF THE INVENTION The present invention relates to the use of a composition comprising at least one silylated polymer comprising at least one alkoxysilane group, at least one catalyst and at least one filler as a grouting mortar (also designated by seal mortar or mortar joint).

In particular, the present invention relates to the use of a composition of a grout composition comprising at least one silylated polymer comprising at least one alkoxysilane group, at least one catalyst and at least one filler. for making joints of a surface coating, especially tile joints or joints between LVT ("luxurious Vinyl Tile" blades in English or "high-end vinyl blade" in French).

Silylated polymer

For the purposes of the present invention, the term silylated polymer means a polymer comprising at least one alkoxysilane group, preferably at least two alkoxysilane groups. Preferably, the silylated polymer comprising at least one alkoxysilane group is a polymer comprising at least one, preferably at least two groups of formula (I):

in which :

R ⁴ and R ⁵ , which are identical or different, each represent a linear or branched alkyl radical comprising from 1 to 4 carbon atoms, with the possibility that when there are several radicals R ⁴ (or R ⁵ ), these radicals are identical or different ;

p is an integer equal to 0, 1 or 2.

The silylated polymer as defined above comprises at least one crosslinkable alkoxysilyl group. The crosslinkable alkoxysilyl group is preferably positioned at the end of said polymer. Positioning in the middle of the chain is not excluded, however. The polymer is generally in liquid form. The joint mortar composition is not crosslinked prior to its application between the slabs of the surface coating. The joint mortar composition is applied in conditions allowing its crosslinking. The crosslinking of the joint mortar composition has the effect of creating, between the polymer chains of the silylated polymer described above and under the action of atmospheric moisture, siloxane-type bonds which lead to the formation of a three-dimensional polymeric network.

According to one embodiment, the silylated polymer comprises at least two groups of formula (I), preferably at least three groups of formula (I), more preferably at least four groups of formula (I).

Preferably, the silylated polymers are chosen from silylated polyurethanes, silylated polyethers, and mixtures thereof.

Preferably, the silylated polymer or polymers have an average molar mass ranging from 500 to 50000 g / mol, more preferably ranging from 700 to 20000 g / mol. The molar mass of the polymers can be measured by methods well known to those skilled in the art, for example by steric exclusion chromatography using polyethylene glycol type standards.

According to one embodiment, the silylated polymer corresponds to one of the formulas (II), (III), (IVa), (IVb) or (V):

(R ⁵ 0) _{3 -} _p (R ⁴ ) _p Si - R ³ - NH - - NH - R ³ - Si (R ⁴ ) p (OR ⁵ ) _3.p

(M)

(IVb) 0) ₃ .p (R ⁴ ) _p Si - R ³ - R - Si (R) p (OR) ₃ . _p

(V)

In formulas (II), (III), (IVa), (IVb) and (V):

R ³ represents a linear or branched divalent alkylene radical comprising

1 to 6 carbon atoms,

R ² represents a divalent linear or branched alkylene radical comprising

2 to 4 carbon atoms,

R ⁶ represents a hydrogen atom, a phenyl radical or a linear, branched or cyclic alkyl radical comprising from 1 to 6 carbon atoms,

n is an integer such that the average molar mass of the polyether block of formula - [OR ² ] _n - ranges from 300 g / mol to 40000 g / mol,

p is an integer equal to 0, 1 or 2,

t is an integer equal to 0, 1 or 2,

u is an integer ranging from 0 to 8.

Preferably, R ¹ is chosen from one of the following divalent radicals whose formulas below show the 2 free valences: a) radic

e) - (CH ₂ ) ₆ - (or hexamethylene radical).

The polymers of formula (II) can be obtained according to a process described in documents EP 2336208 and WO 2009/106699. Among the polymers corresponding to formula (II), mention may be made of:

GENIOSIL® STP-E10 (available from Wacker): polyether comprising two groups (I) of dimethoxy type (mi equal to 0, p equal to 1 and R ⁴ and R ⁵ represent a methyl group) having a mean molar mass of a number of 8889 g / mol where R ³ represents a methyl group;

GENIOSIL® STP-E30 (available from Wacker): polyether comprising two groups (I) of dimethoxy type (mi equal to 0, p equal to 1 and R ⁴ and R ⁵ represent a methyl group) having a mean molar mass of 14493 g / mol number where R ³ represents a methyl group;

SPUR + ® 1050MM (available from Momentive): polyurethane comprising two groups (I) of trimethoxy type (half different from 0, p equal to 0 and R ⁵ represents a methyl group) having a number-average molar mass of 16393 g / mol where R ³ represents an n-propyl group;

SPUR + ® Y-19116 (available from Momentive): polyurethane comprising two groups (I) of trimethoxy type (half different from 0 and R ⁵ represents a methyl group) having a number-average molar mass ranging from 15,000 to 17,000 g / mol g / mol where R ³ represents an n-propyl group;

DESMOSEAL® XP 2636 (available from Bayer): polyurethane comprising two groups (I) of trimethoxy type (ml different from 0, p equal to 0 and R ⁵ represents a methyl group) having a mass molar number average of 15038 g / mol where R ³ represents an n-propyl group.

As an example of silylated polymers of formula (II), mention may also be made of Geniosil® XB502, a commercial product available from Wacker. This Geniosil® XB502 product includes a blend of two products (A) and (B) where

(A) is a polymer of formula (II) having a number average molecular weight of about 14000 g / mol where m is zero, p is 1, R ⁵ and R ⁴ represent a methyl group, R ³ represents a methylene group, and the group - [OR ² ] _n - comes from a polypropylene glycol;

(B) is a silicone or polysiloxane resin having a number average molecular weight of about 800 g / mol of methyl phenyl silsesquioxane type terminated by methoxy groups (CAS 1211908-05-2),

the products (A) and (B) being present in a mass ratio (A) / (B) of approximately (25-30) / (70-75).

The polymers of formula (III) can be obtained by hydrosilylation of polyether diallyl ether according to a method described for example in document EP 1829928. Among the polymers corresponding to formula (III), mention may be made of the MS ® 303H polymer (available from Kaneka) corresponding to a polyether comprising two groups (I) of dimethoxy type (p equal to 1 and R ⁴ represents a methyl group) having a number-average molar mass of 12030 g / mol.

The polymers of formula (IVa) can be obtained according to a process as described in documents EP 2336208 and WO 2009/106699 (as for obtaining the polymer of formula (II)) by substituting mole for mole in the second stage

OC M - R ³ - Si (R) p (OR ⁵ ) _{3¾ |}

The polymers of formula (IVb) can be obtained according to a process similar to that of the polymer (V) described in the experimental part by substituting mole for mole in the second stage:

H N -

R ⁶

The adhesive composition may comprise a mixture of two silylated polymers, including a polymer of formula (II) with a number-average molar mass of 14000 g / mol and a polymer of formula (IVa) with a number-average molar mass of 800 g / mol . The mass proportion (II) / (IVa) between the polymer of formula (II) and the polymer of formula (IVa) can be 25/75.

An example of a process for producing a silylated polymer of formula (V) is described in the experimental part. According to a preferred embodiment of the invention, the sealant composition comprises at least one silylated polymer of formula (IVa) or (IVb), preferably at least one polymer of formula (IVa).

According to one embodiment, the mortar composition comprises at least two different silylated polymers chosen from a polymer of formula (II), a polymer of formula (III) a polymer of formula (IVa), a polymer of formula (IVb) and a polymer of formula (V). According to a preferred embodiment of the invention, the sealant composition comprises at least one silylated polymer of formula (II) and at least one silylated polymer of formula (IVa).

According to a preferred embodiment of the invention, the mortar composition comprises at least one silylated polymer chosen from a polymer of formula (II), (III) or (V), preferably in combination with a silicone resin of formula ( VI).

According to a particular embodiment of the invention, the mortar composition does not comprise (co) polymers comprising (meth) acrylate or (meth) acrylic units.

The silylated polymer (s) preferably represents from 3 to 30% by weight, preferably from 8 to 30% by weight, preferably from 12 to 24% by weight, of the total weight of the sealant composition.

Catalyst

The catalyst used in the sealant mortar composition according to the invention may be any catalyst known to those skilled in the art for silanol condensation. Examples of such catalysts include:

aminosilanes such as N- (2-aminoethyl) -3-aminopropyltrimethoxysilane or 3-aminopropyltrimethoxysilane, organic titanium derivatives such as titanium acetylacetonate (commercially available under the name TYZOR® AA75 from DuPont),

aluminum such as aluminum chelate (commercially available under the name K-KAT® 5218 from King Industries), amines such as 1,8-diazabicyclo [5.4.0] undec-7-ene (DBU ) or 1,5-diazabicyclo [4.3.0] non-5-ene (DBN),

tin catalysts such as Neostann® S-1 or Tib-Kat® 216 (available from Kaneka or Tib Chemicals respectively). These tin catalysts are particularly suitable for silylated polymers of formula (III).

The catalyst or catalysts preferably represent from 0.1 to 1% by weight, preferably from 0.3 to 0.5% by weight, of the total weight of the joint mortar composition.

loads

The fillers can make it possible to increase the volume of the joint mortar composition. The fillers may also make it possible to modify the visual appearance of the joint obtained after hardening of the joint mortar composition.

The filler used in the sealant mortar composition according to the invention preferably has a particle size ranging from 1 to 400 μιη, more preferably from 10 to 350 μιη, more preferably from 50 to 300 μιη.

Preferably, the filler is an inorganic filler.

According to one embodiment, the filler is selected from sand, calcium carbonate, glass beads, glass, quartz, barite, alumina, mica, talc. Preferably, the filler is selected from sand, calcium carbonate and glass beads.

According to one embodiment, the mortar composition comprises at least two different fillers chosen from sand, calcium carbonate, glass beads, glass, quartz, barite, alumina, mica, talc, preferably selected from sand, calcium carbonate and glass beads.

According to one embodiment, the sand is a colored sand. For the purposes of the present invention, a colored sand is a sand coated with a colored thermoset resin. For example, the sand may be coated with a polyaspartic or polyurethane or epoxy resin in which a pigment is dispersed. Such colored sands may contain from 1 to 10% by weight of pigment, typically from 2 to 3% by weight of pigment, relative to the total weight of colored sand. Colored sands are commercially available from the Sibelco Company under the name Blansil® 24T for example. The colored sand makes it possible to improve the ease of cleaning the tiles or vinyl strips after grouting (application of the joint between two tiles or slabs), with respect to a composition comprising sand and pigments.

The sand that can be used in the present invention preferably has a particle size ranging from 1 to 400 μιη, more preferably from 10 to 350 μιη, more preferably from 50 to 300 μιη.

Preferably, if calcium carbonate is used, it is rendered hydrophobic, for example with calcium stearate or an analogue for imparting partial or total hydrophobicity to the calcium carbonate particles. The more or less hydrophobic character of the calcium carbonate will have an impact on the rheology of the composition. In addition, the hydrophobic coating prevents the calcium carbonate from absorbing the constituents of the joint mortar composition and rendering them ineffective. The hydrophobic coating of calcium carbonate may represent from 0.1 to 3.5% by weight, relative to the total weight of calcium carbonate. As an example of calcium carbonate, mention may be made of Mikhart® 1T (available from La Provençale).

The calcium carbonate which may be used in the present invention preferably has a particle size ranging from 1 to 400 μιη, more preferably from 10 to 350 μιη, more preferably from 50 to 300 μιη.

The glass beads that can be used in the present invention preferably have a particle size ranging from 1 to 400 μιη, more preferably from 10 to 350 μιη, more preferably from 50 to 300 μιη.

The filler (s) is preferably from 5 to 85% by weight, preferably from 10 to 80% by weight, of the total weight of the joint mortar composition.

Joint mortar composition

According to one embodiment, the composition comprises:

from 3 to 30% by weight, preferably from 8 to 30% by weight, more preferably from 12 to 24% by weight, of at least one silylated polymer,

relative to the total weight of the joint mortar composition. According to one embodiment of the invention, the composition further comprises at least one additive chosen from plasticizers, solvents, in particular volatile solvents, pigments, moisture absorbers (in English "moisture scavenger"), UV stabilizers, flakes, fluorescent materials or luminescent materials.

The plasticizer may, for example, be chosen from the derivatives of benzoic acid, phthalic acid, trimellitic acid, pyromellitic acid, adipic acid, sebacic acid, fumaric acid and maleic acid. , itaconic acid or citric acid or from derivatives of polyester, polyether, hydrocarbon mineral oil. Among phthalic acid derivatives, mention may be made of phthalates, such as dibutyl phthalate, dioctyl phthalate, dicyclohexyl phthalate, diisooctyl phthalate, diisodecyl phthalate, dibenzyl phthalate or phthalate phthalate. butyl benzyl. Preferably, the plasticizer, if present, is chosen from phthalates, sebacates, adipates and benzoates.

In particular, the plasticizer is compatible with the polymer and does not become overbearing in the composition. The plasticizer makes it possible to increase the plasticity of the composition and to reduce its viscosity.

When a plasticizer is present in the composition, its content is preferably less than or equal to 5% by weight, more preferably less than or equal to 3% by weight, expressed relative to the total weight of the composition. When present, the plasticizer may for example represent from 0.1 to 5% by weight or from 0.5 to 3% by weight of the total weight of the composition.

The solvent is preferably a volatile solvent at room temperature (temperature of the order of 23 ° C). The volatile solvent may for example be chosen from volatile alcohols at room temperature, such as ethanol or isopropanol. The volatile solvent makes it possible to reduce the viscosity of the composition and to make the sealant composition easier to apply. The volatile nature of the solvent allows the seal, obtained after curing the composition, to no longer contain solvent. Thus, the solvent does not have a negative influence on the hardness of the joint.

When a solvent, in particular a volatile solvent, is present in the composition, its content is preferably less than or equal to 3% by weight, more preferably less than or equal to 2% by weight, expressed relative to the total weight of the composition. When present, the solvent, in particular the volatile solvent, may for example represent from 0.5 to 3% by weight or from 1 to 2% by weight of the total weight of the composition.

When a pigment is present in the composition, its content is preferably less than or equal to 3% by weight, more preferably less than or equal to 2% by weight. weight, expressed in relation to the total weight of the composition. When present, the pigment may for example represent from 0.1 to 3% by weight or from 0.5 to 2% by weight of the total weight of the composition. The pigments can be organic or inorganic pigments.

The moisture absorber, if present, may be chosen from vinyltrimethoxysilane (VTMO), vinyltriethoxysilane (VTEO), alkoxyarylsilanes, such as GENIOSIL® XL 70 available from Wacker.

When a moisture absorber is present in the composition, its content is preferably less than or equal to 3% by weight, more preferably less than or equal to 2% by weight, expressed relative to the total weight of the composition. When present, the moisture absorber may for example represent from 0.5 to 3% by weight or from 1 to 2% by weight of the total weight of the composition.

Advantageously, the adhesive composition according to the invention comprises, besides the silylated polymer (s), the filler (s) and the catalyst (s), at least one silicone or polysiloxane additive, preferably having a structure of formula (VI):

in which :

It has been observed that the silicone or polysiloxane additive makes it possible to further improve the performance of the joint of the surface coating, in particular the chemical and mechanical resistance of the coating. The silicone or polysiloxane additive may comprise from 0.1 to 30% by weight, preferably from 1 to 25% by weight, more preferably from 5 to 20% by weight, of the total weight of the mortar composition. The silicone additive or polysiloxane may have a structure of formula (VI) in the form of a "cage", with for example the structure of a silsesquioxane compound. According to one embodiment, the silicone or polysiloxane additive may be chosen from a polyalkylaromatic silsesquioxane compound terminated with methoxy groups (CAS 1211908-05-2).

According to one embodiment, the sealant mortar composition comprises, in particular, essentially consists of:

from 0.1 to 30% by weight, preferably from 1 to 25% by weight, more preferably from 5 to 20% by weight, of at least one silicone or polysiloxane additive, relative to the total weight of the seal mortar composition.

Preferably, the composition comprises:

from 0.1 to 20% by weight, preferably from 0.5 to 15% by weight, of at least one additive chosen from plasticizers, solvents, in particular volatile solvents, pigments, absorbents, moisture, UV stabilizers, flakes, fluorescent materials or luminescent materials, or silicone or polysiloxane additives,

relative to the total weight of the joint mortar composition.

According to one embodiment, the composition essentially consists of from 3 to 30% by weight, preferably from 8 to 30% by weight, more preferably from 12 to 24% by weight, of at least one silylated polymer,

from 0.1 to P / O by weight, preferably from 0.3 to 0.5% by weight, of at least one catalyst,

from 0.1 to 20% by weight, preferably from 0.5 to 15% by weight, of at least one additive chosen from plasticizers, solvents, in particular volatile solvents, pigments, absorbents and moisture, UV stabilizers, flakes, fluorescent materials or luminescent materials, or silicone or polysiloxane additives,

relative to the total weight of the joint mortar composition.

According to one embodiment, before application to a surface coating, the sealant composition according to the invention is substantially anhydrous, preferably completely anhydrous.

The sealant composition according to the invention is preferably in single-component form, that is to say that all the components are packaged in the same compartment.

The joint mortar composition is preferably ready for use, ie the user (an individual or a professional) can directly apply the mortar composition to make the joint, without having to perform a premixing.

The joint mortar compositions are preferably packaged in the absence of air, in particular away from moisture in the air. For example, sealant compositions are stored under vacuum, for example in vacuum bags. Vacuum aluminum bags are particularly well suited for storing sealant compositions according to the invention. The sealant composition according to the invention may also be packaged in an inert environment, for example under a nitrogen atmosphere.

The sealant mortar composition according to the invention may be packaged in the form of an article containing said sealant mortar composition insulated from ambient moisture and ready for use. In particular, said sealant composition is preferably packaged in an anhydrous form in said article. According to one embodiment, the composition is contained in a hermetic package, in particular a pouch, in which the mortar composition is packaged under an inert atmosphere or under vacuum. Joint mortar compositions may be prepared by mixing the silylated polymer (s) and the filler (s) at a temperature of from 5 ° C to 80 ° C, preferably under an inert atmosphere. The catalyst (s) may be added at the same time as the silylated polymer (s) but said catalysts are preferably added in a second step after mixing the polymers and fillers. The other additives are introduced into the joint mortar composition in accordance with the usual practice. Realization of joints

The present invention provides the use of the composition described above for making seals of a surface coating. The surface coating may be tiles (tile tiles) or slats or slabs.

The tiles can be of various natures and different surfaces, for example the surface can be smooth or non-slip. Among the tiles that can be used are ceramic tiles, but also tiles of marble, granite, limestone, cements or stone.

Blades or slabs can be flexible or semi-flexible. Among the blades or slabs that can be used are LVT blades (vinyl blade) and cork-based blades. Among the LVT blades, there may be mentioned blades based on PVC (polyvinyl chloride). In particular, the PVC-based blades can be chosen from homogeneous PVC blades, multilayer PVC blades or cork PVC strips. The seal is for example obtained after applying the sealant mortar composition in the gap between two tiles or blades and drying the joint mortar composition.

The gap between the tiles or the blades may for example have a width ranging from 1 mm to 30 mm.

The blades or tiles can be of different shapes, for example in the form of polygons, such as squares, rectangles, diamonds, hexagons.

For example, tiles or blades may have sides of a length ranging from a few centimeters to a few meters.

Preferably, the tiles or the blades are fixed on the support (ground or wall for example), leaving a gap between two tiles or two blades. The tiles or the blades can be fixed on the support with the aid of an adhesive composition, conventionally used for this type of application. Among these adhesive compositions to glue the tiles or the boards on the support, cement-based adhesive mortars or ready-to-use tile adhesives based on aqueous phase polymers may be mentioned.

According to one embodiment, the surface coating is present on a support, which may be a floor or a wall. The support may for example be concrete, cellular concrete, old tiles or floors, wood, anhydrite screed or plasterboard.

The sealant mortar composition may be applied by any method known to those skilled in the art, for example by means of a spatula, a rubber scraper or a foam scraper.

Surface coating

The present invention also provides a surface coating comprising tiles or blades, characterized in that the joints between two adjacent tiles or blades are made using a joint mortar composition comprising at least one silylated polymer, at at least one catalyst and at least one filler.

According to one embodiment, the sealant composition used to make the surface coating is as defined in the present invention.

According to one embodiment, the tiles and / or the blades are as defined in the present invention. According to one embodiment, the surface coating is present on a support, which may be a floor or a wall. The support may for example be concrete, cellular concrete, old tiles or floors, wood, anhydrite screed or plasterboard. Surface coating manufacturing process

The present invention also provides a method of manufacturing the surface coating comprising tiles or blades separated from each other by at least one gap. The manufacturing method comprises the steps of: a) applying the sealant composition according to the invention in at least one interstice of said surface coating,

b) hardening of the joint mortar composition. Step a) may be preceded by a step of laying the tiles or blades on a support. Said tiles or said blades may be optionally bonded to said support. This bonding can be performed using an adhesive composition conventionally used for this type of application.

Before step b) of curing the composition, it is possible to provide a step of cleaning the tiles or blades to remove the excess composition that could have been deposited on said tile or blades.

Step b) of curing can for example be carried out thanks to the ambient humidity (or atmospheric humidity); in particular, a physical or mechanical step for curing (or drying) is not necessary.

For example, the ambient humidity can be characterized by a relative humidity of 50% at 23 ° C.

EXAMPLES

Example of a process for producing a silylated polymer of formula (V) as described above:

Step (i): Synthesis of a polyurethane comprising 2 -NCO end groups and one or more polyether blocks:

In a closed reactor of 250 ml, equipped with stirring, heating means, a thermometer and connected to a vacuum pump, is introduced 83.04 g of Desmophen® 4028 BD polyether polyol having a hydroxyl number of 28. mgKOH per g (corresponding to an equivalent number of -OH function equal to 0.499 mmol / g). The whole is heated to 80 ° C and maintained at a reduced pressure of 20 mbar for 1 hour to dehydrate the polyether polyol.

0.5 mg of a bismuth / zinc carboxylate catalyst (Borchi® Kat VP0244 from Borchers GmbH) are then introduced into the reactor maintained at atmospheric pressure and brought to a temperature of 90 ° C. and 8.79 g. isophorone diisocyanate IPDI (titrating 37.6% w / w in -NCO group), the amounts introduced thus corresponding to an NCO / OH ratio equal to 1.9. The polyaddition reaction is continued for 4 hours until 91.83 g of a polyurethane having a content of -NCO (followed by potentiometric titration with an amine) equal to 0.406 mmol / g, which corresponds to the complete consumption of the hydroxyl functions of the polyether polyol.

Step (ii): Synthesis of a polyurethane terminated by urea functions each connected to an alkoxy silyl end group:

8.23 g of gamma-amino-n-propyl-triethoxysilane (M = 221 g / mol), corresponding to an NCO / NH 2 ratio of 1, are introduced into the reactor at the end of step (i). The reactor is then maintained under an inert atmosphere at 100 ° C. for 1 hour until complete reaction (detected by the disappearance of the -NCO band at Infra-red analysis).

100.06 grams of a translucent product are obtained.

Its melt viscosity measured by a Brookfield RTV viscometer (at 23 ° C. for a rotation speed of 20 rpm and a needle 7) is 85,000 mPa · s.

Its number-average molecular weight is 22500 Da measured by steric exclusion chromatography or GPC (for "Gel Permeation Chromatography").

Preparation of mortar compositions

The following products have been used for the manufacture of joint mortar compositions according to the invention:

the following silylated polymers:

• Geniosil® XB502 (available from Wacker);

• Geniosil® STPE10 (available from Wacker);

• Geniosil® STPE30 (available from Wacker);

• MS® 303H (available from Kaneka);

• Desmoseal® SXP2636 (available from Bayer);

• SPUR + ® 1050M (available from Momentive);

• SPUR + ® Y 19116 (available from Momentive);

Silane® Al 120, N- (beta-aminoethyl) -gammaaminopropyltrimethoxysilane catalyst, available from Momentive, Blansil® 24T, colored sand having a real density (pycnometer) of 2.65 and an apparent density dry sand of 1.5, available from Sibelco,

Spheriglass® 2024, a glass microbead having a particle size distribution of from 106 to 212 μιη and a bulk density (measured according to ASTM D-3101-78) of 1.17 kg / m ³ and compacted about 1.26 kg / m ³ , available from Potters,

Mikhart® 1T, calcium carbonate having a density of 2.7 and an uncapped bulk density of 0.7 g / cm ³ and packed at 1 g / cm ³ , available from La Provençale,

Hexamoll Dinch®, a diisononyl ester plasticizer of 1,2-cyclohexane dicarboxylic acid, available from BASF, isopropanol solvent, Silane® A171, vinyltrimethoxysilane (CH30) 3SiCH = CH ₂ type moisture absorber, available from Wacker.

The compositions of Examples 1 to 8 were prepared according to the following procedure: in a stirring mixer under nitrogen, the following constituents are introduced in the order:

Silylated polymer,

Colored sand (if present),

Calcium carbonate,

- Glass microbead,

plasticizer,

Solvent,

- Moisture absorber,

Catalyst.

The compositions are then packaged in an aluminum vacuum bag.

The compositions of Examples 1 to 8 show the ingredients and proportions shown in Table 1 below. The proportions are expressed as a percentage by weight relative to the total weight of the joint mortar composition.

Table 1: compositions of Examples 1 to 8

The compositions of Examples 1 and 2 differ essentially from each other in the nature of the filler: the composition of Example 1 comprises a majority of colored sand as a filler while the composition of Example 2 comprises a majority of glass beads as a load.

The compositions of Examples 3 to 8 correspond to the compositions of Example 1 in which the nature of the silylated polymer has been modified.

These compositions 1 to 8 were compared to commercial comparative joint mortar compositions:

Comparative Composition A: Composition Comprising an Epoxy Binder having a CAS Number 28064-14-4, 3-Aminomethyl-3,5,5- trimethylcyclohexylamine as hardener, and sand (commercial product Weber.joint poxy® available from Weber), Comparative composition B: composition comprising a binder based on an aqueous dispersion of polyurethane and sand (commercial product TruColor ® available from Bostik),

Comparative Composition C: Composition comprising a cementitious binder and sand (Weber joint fin® commercial product available from Weber). Surface tension of joints after curing in ambient air and at 23 ° C for 28 days

Surface tension was evaluated using test inks. The test ink is quickly applied to the surface of the sample using the brush built into the bottle. One starts directly with an ink having a high surface tension (for example 72 mN / m). If ^the brush stroke application on the edges are stable for two seconds, the surface is easily wettable. The surface tension of the substrate corresponds to at least the value of the test ink.

If the brush stroke test ink contracts, it continues ^testing with the next lower ink. In this way, we gradually approach the value of the surface tension of our sample. The surface tension of the material is equal to the value of the last ink tested which showed good wetting for at least 2 seconds.

The surface tensions are shown in Table 2 below. Table 2: Surface tensions

The lower the surface tension, the greater the resistance to stainability. It can be seen that the seals according to the invention are easier to clean and more resistant to stains than commercial epoxy-based seals or an aqueous polyurethane dispersion. UV resistance after 1 month at 40 ° C and intense exposure under UV lamp

To verify the U.V strength of the compositions, the compositions of Examples 1 and 2 were applied to earthenware in a thickness of 1 cm. The products were allowed to cure for 7 days and then placed under a U.V lamp at 40 ° C. for 1 month. The ultraviolet lamp (model HQL 400) has a power of 400W and a luminous flux of 22 000 Lm.

A colorimeter (Minolta brand, model CR-400) was used to evaluate the color, before and after exposure to the UV lamp. Parameters L, a and b were measured before exposure (L _aV ant, a _v ant and drunk) and after exposure (L _after , _after and after) and the difference found for each parameter is shown in Table 3 below (Cleansing-Laprès; a _a Staying has _ap ery; drooling-BAfter). The absolute sum of the three differences (delta) is also calculated and quantifies the UV resistance

Table 3: Differences in parameters L, a and b before and after exposure and sum of differences in absolute value (delta)

It is considered that if the delta is less than or equal to 2, the color difference is not perceptible by the eye of the user. In particular, Table 3 shows that the comparative composition based on epoxy binder changes color after UV exposure, especially the yellowing epoxy composition when exposed to UV.

Chemical resistance and mechanical resistance

The chemical resistance can be evaluated according to the EN 12808-1 standard of January 2009. The mechanical resistance can be evaluated by measuring the Shore D hardness according to the ISO 868 standard of March 2003. In particular, the chemical resistance is evaluated by measuring the percentage absorption mass of the seal when said seal is immersed in different solutions and the mechanical strength is evaluated by measuring the Shore D hardness of the joint before and after immersion of the joints in different solutions. In accordance with the EN 12808-1 standard of January 2009, these tests were carried out on samples after 28 days of curing in air (23 ° C and 50% relative humidity). The samples are then immersed for 3 days in different chemical solutions at 23 ° C. The samples were also immersed in water at 50 ° C for 3 days.

The mass percentage of absorption when the joints are immersed in water at 50 ° C for 3 days is shown in Table 4 below, where the "mass before test" refers to the mass of the seal before immersion and the " mass after test 'means the mass of the joint after immersion.

Table 4: Measurement of chemical resistance - immersion 3 days in water at

50 ° C

The sealant mortar compositions according to the invention have completely acceptable mass percentages of water absorption, in particular the water uptake is less than 7% for all the compositions 1 to 8. On the contrary, the comparative composition C has a water intake that is much too high.

The percentage of hardness loss when the joints are immersed in water at 50 ° C for 3 days is shown in Table 4bis below, where the "hardness "pre-test" means the Shore D hardness of the seal before immersion and the "hardness after test" means the Shore D hardness of the seal after immersion.

Table 4a: Measurement of mechanical strength - immersion 3 days in water at

50 ° C

The sealant mortar compositions according to the invention have a percentage of loss of hardness quite acceptable, in particular the loss of hardness is less than 15% for all of the compositions 1 to 8. On the contrary, the comparative compositions B and C have a hardness loss greater than 30%>.

The mass percentage of absorption when the joints are immersed in 20% citric acid at a temperature of 23 ° C for 3 days is shown in Table 5 below, where the "test mass" refers to the mass of the seal before immersion and "mass after test" means the mass of the seal after immersion. Table 5: Measurement of chemical resistance - 3 days immersion in acid

citric at 20% at 23 ° C

The sealant mortar compositions according to the invention have altogether acceptable mass percentages of citric acid absorption, in particular the setting in mass is less than 10%> for all the compositions 1 to 8. On the contrary the cement-based seal (composition C) was destroyed on immersion for 3 days in 20% citric acid.

The percentage of hardness loss when the seals are immersed in 20% citric acid at a temperature of 23 ° C for 3 days is shown in Table 5bis below, where "hardness before testing" refers to the Shore D hardness of the seal before immersion and the "hardness after test" refers to the Shore D hardness of the seal after immersion. Table 5a: Measurement of mechanical strength - immersion for 3 days in 20% citric acid at a temperature of 23 ° C

The sealant mortar compositions according to the invention have a percentage of loss of hardness quite acceptable, in particular the loss of hardness is less than 20% for all the compositions 1 to 8. On the contrary, the seal based of cement (composition C) was destroyed during immersion for 3 days in 20% citric acid.

The mass percentage of absorption when the joints are immersed in a basic solution of calcium hydroxide (Ca (OH) ₂ ) at 20% at a temperature of 23 ° C. for 3 days is indicated in Table 6 below. , where "test mass" refers to the mass of the seal before immersion and "mass after test" refers to the mass of the seal after immersion.

Table 6: Measurement of chemical resistance - 3 days immersion in Ca (OH) ₂ at

20% at 23 ° C

The sealant mortar compositions according to the invention have completely acceptable calcium hydroxide absorption mass percentages, in particular the solvency content is less than 5% for all the compositions 1 to 8. On the contrary the caking is respectively 6.02%> for the comparative composition B based on an aqueous dispersion of polyurethane and 20.4% for the comparative composition C based on cement.

The percent hardness loss when the seals are immersed in 20% basic calcium hydroxide solution (Ca (OH) ₂ ) at a temperature of 23 ° C for 3 days is shown in Table 6a below. , where "test hardness" refers to the Shore D hardness of the seal before immersion and "test hardness" refers to the Shore D hardness of the seal after immersion. Table 6a: Measurement of mechanical strength - immersion 3 days in

Ca (OH) ₂ at 20% at 23 ° C

The sealant mortar compositions according to the invention have a percentage of loss of hardness quite acceptable, in particular the loss of hardness is less than 15% for all compositions 1 to 8. As shown in Table 6bis, the loss of hardness of the compositions 1 to 8 according to the invention is lower than the loss of hardness of the comparative compositions B and C.

The mass percentage of absorption when the joints are immersed in a solution of glycol ether at a temperature of 23 ° C for 3 days is shown in Table 7 below, where the "mass before test" designates the mass of the seal before immersion and "mass after test" means the mass of the joint after immersion. The glycol ether is used in cleaning products such as window cleaners.

Table 7: Measurement of chemical resistance - immersion for 3 days in ether

20% glycol at 23 ° C

The sealant mortar compositions according to the invention have mass percentages of glycol ether absorption that are quite acceptable, in particular the setting in mass is less than 18% for all the compositions 1 to 8. On the contrary the caking is respectively 48.6% for the comparative composition B based on an aqueous polyurethane dispersion and 20.4% for the comparative composition C based on cement.

The percentage of hardness loss when the seals are immersed in a glycol ether solution at a temperature of 23 ° C for 3 days is shown in Table 7bis below, where the "hardness before test" refers to the Shore hardness. D of the seal before immersion and the "hardness after test" refers to the Shore D hardness of the seal after immersion. Table 7a: measurement of mechanical strength - immersion for 3 days in ether

20% glycol at 23 ° C

The sealant mortar compositions according to the invention have a percentage of loss of hardness quite acceptable, in particular the loss of hardness is less than 25% for all of the compositions 1 to 8. As shown in Table 7bis, the loss of hardness of the compositions 1 to 8 according to the invention is lower than the loss of hardness of the comparative compositions B and C. It is observed that the chemical resistance and the mechanical strength of the sealant compositions according to the invention is better compositions B and C where the binder is an aqueous binder or a cementitious binder. It is also noted that the chemical and mechanical resistance of the sealant mortar compositions according to the invention is of the same order of magnitude as the chemical and mechanical resistance of the composition A where the binder is based on epoxy.

It will be noted more particularly that the joint mortar compositions of Examples 1 and 2 in which the binder comprises a silylated polymer of formula (II) in combination with a silicone or polysiloxane additive of formula (VI), have an improved chemical resistance compared to the composition A based on epoxy.

Thus, the sealant mortar composition according to the invention has both good stain resistance, good UV resistance and good chemical resistance. In particular, the sealant composition according to the invention can easily be cleaned, that is, the excess composition present on the tiles or blades can easily be removed. The composition of Joint mortar according to the invention is easier to clean and has a durable color over time due to its greater UV resistance than an epoxy composition. Of course, the present invention is not limited to the examples and embodiments described and shown, but it is capable of numerous variants accessible to those skilled in the art.

Claims

1. Use of a composition comprising at least one silylated polymer comprising at least one alkoxysilane group, at least one catalyst and at least one filler as a grouting mortar.

2. Use of a composition comprising at least one silylated polymer comprising at least one alkoxysilane group, at least one catalyst and at least one filler for making joints of a surface coating.

3. Use according to claim 2, wherein the seal is a tile joint or a seal between LVT blades.

4. Use according to one of claims 1 to 3, wherein the silylated polymer comprising at least one alkoxysilane group is chosen from silylated polyethers comprising at least one alkoxysilane group and silylated polyurethanes comprising at least one alkoxysilane group, alone or in combination with mixed.

5. Use according to one of claims 1 to 4, wherein the silylated polymer comprising at least one alkoxysilane group is chosen from polymers of formulas (II), (III), (IVa), (IVb) or (V) below:

(R ⁵ O) ₃ - _P (R ⁴ ) p Si - R ³ - NH - C - [OR ² ] _n O - C - NH - R ¹ - NH - C - - NH - R ³ - Si (R ⁴ ) p (OR ⁵ ) ₃ .

(H)

(M)

(IVa) (R ⁴ ) p (R ⁵ ) r (OR ⁵ ) ₂ . _t (R ⁴ ) _p (R ⁵ 0) _3p Si - θΤ Si ( ^■ O - Si) - R ³ - N - C - NH - R ¹ NH - C - [OR ² ] _n - O - C - NH - - Si (OR ⁵ ) ₃

(R ⁴ ) _s (R ⁴ ) _t R ^b O 4

(IVb)

(R ⁵ 0) ₃ .p (R ⁴ ) _p Si - R ³ - N - C - NH - R NH - C - [OR ² ] _n - O - C - NH - R ¹ NH - C - N - R - If (R) p (OR) ₃ . _p

R ⁶ 0 oo OR ⁶

m

(V) in formulas (II), (III), (IVa), (IVb) and (V):

R ³ represents a linear or branched divalent alkylene radical comprising

1 to 6 carbon atoms,

R ² represents a divalent linear or branched alkylene radical comprising

2 to 4 carbon atoms,

p is an integer equal to 0, 1 or 2,

t is an integer equal to 0, 1 or 2,

u is an integer ranging from 0 to 8.

6. Use according to any one of claims 1 to 5, wherein the composition further comprises at least one silicone additive or polysiloxane, preferably of structure (VI) following:

in which :

Qi and Q ₂ represent, independently of one another, a radical chosen from a hydrogen atom, a linear or branched alkyl group comprising from 1 to 30 carbon atoms, an alkenyl group comprising from 2 to 30 carbon atoms, carbon, a substituted or unsubstituted aromatic group comprising from 6 to 30 carbon atoms, an allyl group comprising from 3 to 30 carbon atoms, a substituted or unsubstituted cyclic aliphatic group comprising from 3 to 30 carbon atoms, an acyl group comprising from 1 to 30 carbon atoms, a primary, secondary or tertiary amine function comprising from 1 to 30 carbon atoms or an acetate function comprising from 1 to 30 carbon atoms,

7. Use according to one of claims 1 to 6, wherein the filler is selected from sand, calcium carbonate, glass beads, glass, quartz, barite, alumina, mica, talc and preferably from sand, calcium carbonate and glass beads.

8. Use according to one of claims 1 to 7, wherein the composition comprises at least two different charges.

9. Use according to claim 8, wherein said at least two fillers are selected from sand, calcium carbonate, glass beads, glass, quartz, barite, alumina, mica, talc and preferably from sand, calcium carbonate and glass beads.

Use according to claim 7 or claim 9, wherein the sand is colored sand.

11. Use according to one of claims 1 to 10, wherein the composition comprises:

from 3 to 30% by weight, preferably from 8 to 30% by weight, more preferably from 12 to 24% by weight, of at least one silylated polymer comprising at least one alkoxysilane group, from 0.1 to 1% by weight, preferably from 0.3 to 0.5% by weight, of at least one catalyst,

relative to the total weight of the joint mortar composition.

12. Use according to one of claims 1 to 11, wherein the composition further comprises at least one additive selected from plasticizers, solvents, pigments, moisture absorbers, UV stabilizers, flakes, materials. fluorescent or luminescent materials.

13. Use according to claim 12, wherein the composition comprises: from 3 to 30% by weight, preferably from 8 to 30% by weight, more preferably from 12 to 24% by weight, of at least a silylated polymer comprising at least one alkoxysilane group,

relative to the total weight of the joint mortar composition.

14. Surface coating comprising tiles or blades, characterized in that the joints between two tiles or two adjacent blades are made using a joint mortar composition as defined in one of claims 1 to 13.

A method of manufacturing a surface coating comprising tiles or blades separated from each other by at least one gap, said method comprising the steps of:

a) applying a joint mortar composition as defined in one of claims 1 to 13 in said gap,

b) hardening of the joint mortar composition.