EP0890670A2 - Spot removal compositions for use in aerosol dispensers - Google Patents

Spot removal compositions for use in aerosol dispensers Download PDF

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Publication number
EP0890670A2
EP0890670A2 EP98305491A EP98305491A EP0890670A2 EP 0890670 A2 EP0890670 A2 EP 0890670A2 EP 98305491 A EP98305491 A EP 98305491A EP 98305491 A EP98305491 A EP 98305491A EP 0890670 A2 EP0890670 A2 EP 0890670A2
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EP
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Prior art keywords
composition
weight
composition according
microemulsion
propellant
Prior art date
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Granted
Application number
EP98305491A
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German (de)
French (fr)
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EP0890670B1 (en
EP0890670A3 (en
Inventor
Jan S.C. Johnson Europlant bv de Jager
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SC Johnson and Son Inc
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SC Johnson and Son Inc
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Classifications

    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/50Solvents
    • C11D7/5004Organic solvents
    • C11D7/5027Hydrocarbons
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0008Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
    • C11D17/0017Multi-phase liquid compositions
    • C11D17/0021Aqueous microemulsions
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0043For use with aerosol devices
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16Organic compounds
    • C11D3/18Hydrocarbons
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22Organic compounds
    • C11D7/24Hydrocarbons

Definitions

  • the present invention relates to compositions suitable for use in aerosol dispensers for removing spots and stains from textiles.
  • Stains and spots can be removed from many textiles by aqueous washing media, as in conventional laundering. However many textiles are adversely affected if brought into contact with water, and an extended drying time may be needed if a conventional aqueous washing medium is used. It is known to remove stains and spots from textiles by the use of so-called "dry cleaning " sprays in which a non-aqueous medium is sprayed on the textile from an aerosol dispenser using a propellant to force the cleaning medium from the dispenser.
  • the liquid medium may contain an absorbent solid.
  • Halogenated hydrocarbons have been used as the cleaning fluid. Halogenated hydrocarbons have also been used as aerosol propellants.
  • halogenated hydrocarbons are no longer acceptable in products released to the atmosphere because of their adverse effect on the ozone layer.
  • Hydrocarbon propellants e.g. propane or butane
  • hydrocarbon solvents have been used as the cleaning liquid.
  • the use of these hydrocarbons introduces a fire hazard because of their flammability.
  • the hydrocarbon solvents although less volatile than the propellant, must be sufficiently volatile to evaporate readily from the surfaces on to which they are sprayed.
  • a spark may be produced which may ignite the hydrocarbons.
  • US-A- 5 269 958 discusses these problems and proposes to overcome them by eliminating the hydrocarbon propellant and solvents.
  • the composition disclosed contains a small amount of water, together with major amounts of dimethyl ether as propellant and dimethoxymethane to remove oil-based stains, a co-solvent, e.g. isopropanol, and a particulate absorbent.
  • oxygenated solvents are relatively expensive and it would be highly desirable to be able to produce a spray cleaning composition which made use of the cheaper and more readily available hydrocarbon solvents but which reduced the disadvantages associated with the use of hydrocarbons.
  • a self-pressurized aerosol composition for spot dry cleaning of a textile comprising
  • the propellant may be a liquefied petroleum gas (LPG).
  • LPG liquefied petroleum gas
  • the propellant is preferably dimethyl ether (DME). This is water-soluble and is less flammable than the hydrocarbon propellants.
  • the quantity of propellant may for example be 2.0 to 50 % by weight of the total composition, preferably 30 to 45 % by weight, e.g ca. 35% by weight.
  • the volatile organic solvent is preferably an alkane having from 5 to 8 carbon atoms in the molecule or a mixture of such alkanes.
  • An example of a suitable volatile organic solvent is a pentane/heptane blend. Such a blend is commercially available as Exxsol 45/100 from Exxon.
  • the quantity of solvent is preferably in the range 10 to 50% by weight of the total composition, more preferably 15 to 45% by weight of the total composition.
  • the particulate absorbent capable of absorbing a stain from a textile on to which the composition is sprayed is one which has a particle size which permits it to be sprayed from a self-pressurized aerosol dispenser.
  • suitable particulate absorbents are fumed or pyrogenic silica, precipitated silica, surface-treated silica, calcium silicate, calcium carbonate, magnesium silicate, starch, clays, talc, magnesium oxide and the like. The nature of the particulate absorbent is discussed in detail in US-A-5 269 958.
  • the quantity of particulate absorbent is preferably 1% to 10%, preferably 5% to 9%, more preferably from 6% to 8% of the total weight of composition.
  • Water is incorporated into the composition in the form of a microemulsion in which water is the internal phase. Despite the water being in the form of droplets within an organic continuous phase it has been found that the presence of a relatively small amount of water has a significant effect on flammability and prevents the production of static electricity if the can is punctured.
  • Water-in-oil emulsions suitable for use in the present invention are available from the firm of Dow under the name "Invert Solvents".
  • the continuous phase may be for example a citrus terpene.
  • the boiling point is preferably less than 90 °C
  • the viscosity is preferably less than 7 cps at 25°C
  • the flash point (closed cup) is preferably below 0°C.
  • the water content is preferably in the range 45% to 55% by weight of the microemulsion.
  • the quantity of water-in-oil emulsion in the composition is preferably in the range 5 to 50%, more preferably 15 to 40%, e.g. 10 to 30 % of the total weight of composition.
  • the absorbent solid when used in the conventional aerosol composition using hydrocarbon solvents and hydrocarbon propellants usually shows no tendency to cake or clump and can be readily dispersed in the composition by shaking.
  • an anti-caking agent in the composition.
  • An example of a suitable anti-caking agent is diammonium phosphate. This may be present, for example, in an amount in the range 0.2 to 1.5% 5 by weight of the total composition, e.g. 0.5% by weight.
  • dimethoxy methane also known as methylal
  • This preferably constitutes not more than 5% of the composition.
  • a self-pressurized spot remover composition suitable for use in an aerosol dispenser for removing stains from textiles was prepared as follows. An intermediate composition was first prepared from the following ingredients. Ingredient Amount (% wt of final product) Hydrocarbon solvent 35.550 Microemulsion 20.000 Absorbent 07.500 Anti-caking agent 00.500 Silicone oil 00.200 Surfactant 01.000 Ammonia 25% 00.250
  • hydrocarbon solvent was a pentane/heptane blend available from Exxon under the trade name "Exxsol DSP 45/100".
  • the microemulsion was a water-in-oil microemulsion supplied by Dow under the name "Invert 1000". It contained about 50% by weight of water with the continuous phase being a low flash point aliphatic hydrocarbon. It had a boiling point of 84°C, a freezing point of -2°C, a vapour pressure of 34.9 mm Hg at 20°C , a viscosity of 6.2 cps,
  • the absorbent was a precipitated silicon dioxide from Akzo available under the trade name "Ketjensil SM604" and with an average particle size of 12 ⁇ m.
  • the anti-caking agent was diammonium phosphate. In addition to having an anti-caking effect it acts as a corrosion inhibitor and has a quenching effect on flammability.
  • the silicone oil was silicone oil with a viscosity of 1000 cps at 25 °C is included to provide a lubricating effect for the absorbent solid in the plastic channels of the valve and actuator of the dispensing device used to dispense the composition.
  • the surfactant was a 70% solution of sodium dioctyl sulphosuccinate in petroleum distillate commercially available from Cytec under the trade name "Aerosil OT-S”. It acts as an additional emulsifier and helps to remove water-based stains.
  • the ammonia was a 25% by weight aqueous solution. It is used to increase the pH of the composition to about pH 8.5 to minimize corrosion of aerosol canisters.
  • the intermediate product was prepared by mixing the liquids, then adding the two solids and agitating with a Silverson-type mixer until a smooth particle free mixture was obtained.
  • Propellant (dimethyl ether) was then added in an amount corresponding to 35% of the total composition (i.e. the composition after the dimethyl ether had been added).
  • a composition was prepared as in Example 1 except that the intermediate composition was prepared using the amounts of ingredients set out below.
  • Ingredient Amount (% wt of final product)
  • Hydrocarbon solvent 40.549 Microemulsion 15.000 Absorbent 07.500
  • Anti-caking agent 00.500 Silicone oil 00.200
  • Surfactant 01.000 Ammonia 25% 00.250
  • a composition was prepared as in Example 1 except that the intermediate composition was prepared using the amounts of ingredients set out below.
  • Ingredient Amount (% wt of final product)
  • Hydrocarbon solvent 30.549 Microemulsion 25.000 Absorbent 07.500
  • Anti-caking agent 00.500 Silicone oil 00.200
  • Surfactant 01.000 Ammonia 25% 00.250
  • a composition was prepared as in Example 1, but with the intermediate composition as set out below, and using Liquefied Petroleum Gases (LPG 48) as propellant.
  • Ingredient Amount (% wt of final product)
  • Hydrocarbon solvent 26.520
  • Microemulsion 2 0.000 Absorbent 07.500
  • Anti-caking agent 00.500
  • Silicone oil 00.200 Ammonia 25% 00.250
  • the quantity of LPG used was 45.00% of the weight of the total composition.
  • valve system was used with the aerosol container used to dispense the composition in all the tests.
  • the discharge rates vary in some cases because the narrow channels in the valve system can become partialy clogged with powder particles.
  • the weights of sample sprayed are however sufficiently close for the tests to provide useful results.
  • Discharge rate 0.665 g/s Weight of sample sprayed 15.67 g Time taken for explosion 23.19 s Discharge rate 0.598 g/s Weight of sample sprayed 14.86 g Time taken for explosion 25.03 s Ignition distance 20 cm
  • compositions of Examples 1, 2, and 3 gave satisfactory removal of stains from textiles without excessive drying times and without adversely affecting the textile because of the presence of water on a variety of oil-based and water-based stains.
  • compositions based on the microemulsions and using dimethyl ether as propellant gave the best flammability results.
  • Better flammability results compared with conventional aerosol dry cleaning compositions are obtained using compositions containing microemulsions even when using hydrocarbon propellants.
  • compositions containing microemulsions will eliminate the risk of static electricity discharge leading to ignition if the aerosol dispenser is accidentally punctured.
  • Conventional compositions can reduce the risk of static electricity discharge by incorporating organic antistatic agents but these are believed to be more dependent on the ambient atmospheric conditions (temperature, humidity) for successful results.

Abstract

A self-pressurized aerosol composition for spot dry cleaning of a textile comprises:
  • a) a propellant,
  • b) a volatile hydrocarbon solvent for removing stains,
  • c) a particulate absorbent capable of absorbing a stain from a textile on to which it is sprayed,
  • and a water-in-oil microemulsion in an amount from 5% to 50% by weight of the total composition including propellant, said aerosol composition containing from 2.5% to 25% by weight of water based on weight of the total composition including propellant.

    Description

    Technical Field
    The present invention relates to compositions suitable for use in aerosol dispensers for removing spots and stains from textiles.
    Background Art
    Stains and spots can be removed from many textiles by aqueous washing media, as in conventional laundering. However many textiles are adversely affected if brought into contact with water, and an extended drying time may be needed if a conventional aqueous washing medium is used.
    It is known to remove stains and spots from textiles by the use of so-called "dry cleaning " sprays in which a non-aqueous medium is sprayed on the textile from an aerosol dispenser using a propellant to force the cleaning medium from the dispenser. The liquid medium may contain an absorbent solid. Halogenated hydrocarbons have been used as the cleaning fluid. Halogenated hydrocarbons have also been used as aerosol propellants. Such halogenated hydrocarbons are no longer acceptable in products released to the atmosphere because of their adverse effect on the ozone layer. Hydrocarbon propellants, e.g. propane or butane, have been used in place of halogenated hydrocarbons and hydrocarbon solvents have been used as the cleaning liquid. However the use of these hydrocarbons introduces a fire hazard because of their flammability. It should be noted that the hydrocarbon solvents, although less volatile than the propellant, must be sufficiently volatile to evaporate readily from the surfaces on to which they are sprayed. There is also a problem of the generation of static electricity if the aerosol canister is punctured and thus releases the contents. A spark may be produced which may ignite the hydrocarbons.
    US-A- 5 269 958 discusses these problems and proposes to overcome them by eliminating the hydrocarbon propellant and solvents. The composition disclosed contains a small amount of water, together with major amounts of dimethyl ether as propellant and dimethoxymethane to remove oil-based stains, a co-solvent, e.g. isopropanol, and a particulate absorbent.
    The oxygenated solvents are relatively expensive and it would be highly desirable to be able to produce a spray cleaning composition which made use of the cheaper and more readily available hydrocarbon solvents but which reduced the disadvantages associated with the use of hydrocarbons.
    Disclosure of Invention
    According to the present invention there is provided a self-pressurized aerosol composition for spot dry cleaning of a textile, said composition comprising
  • a) a propellant,
  • b) a volatile hydrocarbon solvent for removing stains, and
  • c) a particulate absorbent capable of absorbing a stain from a textile on to which it is sprayed,
  • characterized in that
    the composition comprises a water-in-oil microemulsion in an amount from 5% to 50% by weight of the total composition including propellant, said composition containing from 2.5 % to 25. % by weight of water based on weight of the total composition including propellant.
    The propellant may be a liquefied petroleum gas (LPG). The propellant is preferably dimethyl ether (DME). This is water-soluble and is less flammable than the hydrocarbon propellants.
    The quantity of propellant may for example be 2.0 to 50 % by weight of the total composition, preferably 30 to 45 % by weight, e.g ca. 35% by weight.
    The volatile organic solvent is preferably an alkane having from 5 to 8 carbon atoms in the molecule or a mixture of such alkanes. An example of a suitable volatile organic solvent is a pentane/heptane blend. Such a blend is commercially available as Exxsol 45/100 from Exxon.
    The quantity of solvent is preferably in the range 10 to 50% by weight of the total composition, more preferably 15 to 45% by weight of the total composition.
    The particulate absorbent capable of absorbing a stain from a textile on to which the composition is sprayed is one which has a particle size which permits it to be sprayed from a self-pressurized aerosol dispenser. Examples of such particulate absorbents are fumed or pyrogenic silica, precipitated silica, surface-treated silica, calcium silicate, calcium carbonate, magnesium silicate, starch, clays, talc, magnesium oxide and the like. The nature of the particulate absorbent is discussed in detail in US-A-5 269 958.
    The quantity of particulate absorbent is preferably 1% to 10%, preferably 5% to 9%, more preferably from 6% to 8% of the total weight of composition.
    Water is incorporated into the composition in the form of a microemulsion in which water is the internal phase. Despite the water being in the form of droplets within an organic continuous phase it has been found that the presence of a relatively small amount of water has a significant effect on flammability and prevents the production of static electricity if the can is punctured.
    Water-in-oil emulsions suitable for use in the present invention are available from the firm of Dow under the name "Invert Solvents". The continuous phase may be for example a citrus terpene. However, it is preferred to use emulsions in which the continuous phase is an aliphatic hydrocarbon phase, preferably a low flash point hydrocarbon phase which evaporates readily, e.g Dow "Invert 1000". Thus the boiling point is preferably less than 90 °C, and the viscosity is preferably less than 7 cps at 25°C, and the flash point (closed cup) is preferably below 0°C.
    The water content is preferably in the range 45% to 55% by weight of the microemulsion.
    The quantity of water-in-oil emulsion in the composition is preferably in the range 5 to 50%, more preferably 15 to 40%, e.g. 10 to 30 % of the total weight of composition.
    The absorbent solid when used in the conventional aerosol composition using hydrocarbon solvents and hydrocarbon propellants usually shows no tendency to cake or clump and can be readily dispersed in the composition by shaking. In the compositions of the present invention it has been found that there is a tendency for the particulate absorbent to cake or clump. This can be overcome by including an anti-caking agent in the composition. An example of a suitable anti-caking agent is diammonium phosphate. This may be present, for example, in an amount in the range 0.2 to 1.5% 5 by weight of the total composition, e.g. 0.5% by weight.
    It may be desirable to include some dimethoxy methane (also known as methylal) in the composition in order to assist in the removal of oil based stains. This preferably constitutes not more than 5% of the composition.
    Best Mode of Carrying Out the Invention Example 1
    A self-pressurized spot remover composition suitable for use in an aerosol dispenser for removing stains from textiles was prepared as follows. An intermediate composition was first prepared from the following ingredients.
    Ingredient Amount (% wt of final product)
    Hydrocarbon solvent 35.550
    Microemulsion 20.000
    Absorbent 07.500
    Anti-caking agent 00.500
    Silicone oil 00.200
    Surfactant 01.000
    Ammonia 25% 00.250
    The hydrocarbon solvent was a pentane/heptane blend available from Exxon under the trade name "Exxsol DSP 45/100".
    The microemulsion was a water-in-oil microemulsion supplied by Dow under the name "Invert 1000". It contained about 50% by weight of water with the continuous phase being a low flash point aliphatic hydrocarbon. It had a boiling point of 84°C, a freezing point of -2°C, a vapour pressure of 34.9 mm Hg at 20°C , a viscosity of 6.2 cps,
    The absorbent was a precipitated silicon dioxide from Akzo available under the trade name "Ketjensil SM604" and with an average particle size of 12µm.
    The anti-caking agent was diammonium phosphate. In addition to having an anti-caking effect it acts as a corrosion inhibitor and has a quenching effect on flammability.
    The silicone oil was silicone oil with a viscosity of 1000 cps at 25 °C is included to provide a lubricating effect for the absorbent solid in the plastic channels of the valve and actuator of the dispensing device used to dispense the composition.
    The surfactant was a 70% solution of sodium dioctyl sulphosuccinate in petroleum distillate commercially available from Cytec under the trade name "Aerosil OT-S". It acts as an additional emulsifier and helps to remove water-based stains.
    The ammonia was a 25% by weight aqueous solution. It is used to increase the pH of the composition to about pH 8.5 to minimize corrosion of aerosol canisters.
    The intermediate product was prepared by mixing the liquids, then adding the two solids and agitating with a Silverson-type mixer until a smooth particle free mixture was obtained.
    Propellant (dimethyl ether) was then added in an amount corresponding to 35% of the total composition (i.e. the composition after the dimethyl ether had been added).
    Example 2
    A composition was prepared as in Example 1 except that the intermediate composition was prepared using the amounts of ingredients set out below.
    Ingredient Amount (% wt of final product)
    Hydrocarbon solvent 40.549
    Microemulsion 15.000
    Absorbent 07.500
    Anti-caking agent 00.500
    Silicone oil 00.200
    Surfactant 01.000
    Ammonia 25% 00.250
    Example 3
    A composition was prepared as in Example 1 except that the intermediate composition was prepared using the amounts of ingredients set out below.
    Ingredient Amount (% wt of final product)
    Hydrocarbon solvent 30.549
    Microemulsion 25.000
    Absorbent 07.500
    Anti-caking agent 00.500
    Silicone oil 00.200
    Surfactant 01.000
    Ammonia 25% 00.250
    Example 4
    A composition was prepared as in Example 1, but with the intermediate composition as set out below, and using Liquefied Petroleum Gases (LPG 48) as propellant.
    Ingredient Amount (% wt of final product)
    Hydrocarbon solvent 26.520
    Microemulsion 20.000
    Absorbent 07.500
    Anti-caking agent 00.500
    Silicone oil 00.200
    Ammonia 25% 00.250
    The quantity of LPG used was 45.00% of the weight of the total composition.
    Flammability tests
    The flammability of the compositions of Examples 1, 2, 3 and 4 was assessed. This was done using modifications of the test procedures described on page 380 of the Aerosol Handbook , 1st edition, M. A. Johnsen et al,, Wayne E. Dorland Company, Caldwell, N. J., 1972. The modified tests are described in US Patent 5 269 958 in columns 10 and 11.
    The same valve system was used with the aerosol container used to dispense the composition in all the tests. The discharge rates vary in some cases because the narrow channels in the valve system can become partialy clogged with powder particles. The weights of sample sprayed are however sufficiently close for the tests to provide useful results.
    Example 1
    Drum Test
    Discharge rate 0.641 g/s
    Weight of sample sprayed 16.09 g
    Time taken for explosion 27.9 s
    Discharge rate 1.06 g/s
    Weight of sample sprayed 16.33 g
    Time taken for explosion 12.91 s
    Discharge rate 0.636 g/s
    Weight of sample sprayed 15.09 g
    Time taken for explosion 19.13 s
    Ignition distance 30 cm
    Flame extension 50 cm, no flashback, not self sustaining.
    Example 2
    Discharge rate 0.665 g/s
    Weight of sample sprayed 15.67 g
    Time taken for explosion 23.19 s
    Discharge rate 0.598 g/s
    Weight of sample sprayed 14.86 g
    Time taken for explosion 25.03 s
    Ignition distance 20 cm
    Flame extension 40 cm, no flashback, not self sustaining.
    Example 3
    Discharge rate 0.633 g/s
    Weight of sample sprayed 16.62 g
    Time taken for explosion 26.10 s
    Discharge rate 0.602 g/s
    Weight of sample sprayed 18.85g
    Time taken for ignition 24.15 s
    Ignition distance 25 cm
    Flame extension 55 cm, no flashback, not self sustaining.
    Example 4
    Weight of sample sprayed 14.5 g
    Time taken for explosion 15.43 s
    Weight of sample sprayed 14.32g
    Time taken for ignition 26.53 s
    Weight of sample sprayed 14.54g
    Time taken for ignition 27.32 s
    Ignition distance 55-60 cm
    Flame extension 50 cm, flashback 10-12 cm, not self sustaining.
    Comparative Test A
    Average flammability results for a commercially available composition intended for spray dry cleaning based on a hydrocarbon solvent without water, LPG as propellant, and containing an amine as an anti-static agent tested as in the Examples above are set out below.
    In these tests the discharge rate was approximately 0.8g/sec. The time to explosion was 22.4 s and the weight of sample sprayed was 10.4 g. Flashback was observed (12 cm ) and the flame was self-sustaining.
    Stain removing tests
    The compositions of Examples 1, 2, and 3 gave satisfactory removal of stains from textiles without excessive drying times and without adversely affecting the textile because of the presence of water on a variety of oil-based and water-based stains.
    A comparison of the flammability results shows that compositions based on the microemulsions and using dimethyl ether as propellant gave the best flammability results. Better flammability results compared with conventional aerosol dry cleaning compositions are obtained using compositions containing microemulsions even when using hydrocarbon propellants.
    The compositions containing microemulsions will eliminate the risk of static electricity discharge leading to ignition if the aerosol dispenser is accidentally punctured. Conventional compositions can reduce the risk of static electricity discharge by incorporating organic antistatic agents but these are believed to be more dependent on the ambient atmospheric conditions (temperature, humidity) for successful results.

    Claims (13)

    1. A self-pressurized aerosol composition for spot dry cleaning of a textile, said composition comprising
      a) a propellant,
      b) a volatile hydrocarbon solvent for removing stains,
      c) a particulate absorbent capable of absorbing a stain from a textile on to which it is sprayed,
      characterized in that the composition comprises a water-in-oil microemulsion in an amount from 5% to 50% by weight of the total composition including propellant, said composition containing from 2.5 % to 25 % by weight of water based on weight of the total composition including propellant.
    2. A composition according to claim 1 wherein the propellant is dimethyl ether.
    3. A composition according to either one of claims 1 or 2 wherein the organic solvent is an alkane having from 5 to 8 carbon atoms in the molecule or is a mixture of such alkanes.
    4. A composition according to any one of the preceding claims wherein the water-in-oil microemulsion has a continuous phase which is an aliphatic hydrocarbon.
    5. A composition according to any one of the preceding claims wherein the microemulsion has a boiling point of less than 90 °C.
    6. A composition according to any one of the preceding claims wherein the viscosity of the microemulsion is less than 7 cps at 25°C.
    7. A composition according to any one of the preceding claims wherein the microemulsion has a flash point (closed cup) below 0°C.
    8. A composition according to any one of the preceding claims wherein the microemulsion has a water content in the range 45% to 55% by weight.
    9. The composition according to any one of the preceding claims which contains from 15 to 40 % by weight of the microemulsion.
    10. The composition according to any one of the preceding claims which contains from 10 to 50 % by weight of volatile hydrocarbon solvent.
    11. The composition according to claim 10 wherein the composition contains 15 to 45% by weight of volatile hydrocarbon solvent.
    12. The composition according to any one of the preceding claims wherein the composition contains an anti-caking agent.
    13. The composition according to claim 11 wherein the anti-caking agent is diammonium phosphate.
    EP98305491A 1997-07-11 1998-07-10 Spot removal compositions for use in aerosol dispensers Expired - Lifetime EP0890670B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    GB9714707 1997-07-11
    GBGB9714707.8A GB9714707D0 (en) 1997-07-11 1997-07-11 Compositions suitable for use in aerosol dispensers

    Publications (3)

    Publication Number Publication Date
    EP0890670A2 true EP0890670A2 (en) 1999-01-13
    EP0890670A3 EP0890670A3 (en) 2000-10-11
    EP0890670B1 EP0890670B1 (en) 2003-05-21

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98305491A Expired - Lifetime EP0890670B1 (en) 1997-07-11 1998-07-10 Spot removal compositions for use in aerosol dispensers

    Country Status (5)

    Country Link
    EP (1) EP0890670B1 (en)
    AT (1) ATE241030T1 (en)
    DE (1) DE69814748T2 (en)
    ES (1) ES2202750T3 (en)
    GB (1) GB9714707D0 (en)

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1270711A1 (en) * 2001-06-28 2003-01-02 Givaudan SA Fabric-cleaning compositions
    EP1491620A1 (en) * 2003-06-27 2004-12-29 S.C. Johnson & Son, Inc. Aerosol composition for spot dry cleaning of fabrics
    US7632793B2 (en) 2005-03-15 2009-12-15 Clariant Produkte (Deutschland) Gmbh Washing and cleaning agents containing acetals as organic solvents

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    DE102005011722B4 (en) * 2005-03-15 2010-04-08 Clariant Produkte (Deutschland) Gmbh Process for the dry cleaning of textile material
    DE102009027206A1 (en) * 2009-06-25 2010-12-30 Chemische Fabrik Kreussler & Co. Gmbh Use of diether compounds in the dry-cleaning of textile, leather or fur products

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    Cited By (6)

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    Publication number Priority date Publication date Assignee Title
    EP1270711A1 (en) * 2001-06-28 2003-01-02 Givaudan SA Fabric-cleaning compositions
    WO2003002701A1 (en) * 2001-06-28 2003-01-09 Givaudan Sa Fabric-cleaning compositions
    US7241727B2 (en) 2001-06-28 2007-07-10 Susan Hart, legal representative Fabric-cleaning compositions
    EP1491620A1 (en) * 2003-06-27 2004-12-29 S.C. Johnson & Son, Inc. Aerosol composition for spot dry cleaning of fabrics
    WO2005001017A1 (en) * 2003-06-27 2005-01-06 S.C. Johnson & Son, Inc. Aerosol composition for spot dry cleaning of fabrics
    US7632793B2 (en) 2005-03-15 2009-12-15 Clariant Produkte (Deutschland) Gmbh Washing and cleaning agents containing acetals as organic solvents

    Also Published As

    Publication number Publication date
    GB9714707D0 (en) 1997-09-17
    EP0890670B1 (en) 2003-05-21
    ES2202750T3 (en) 2004-04-01
    DE69814748T2 (en) 2004-03-11
    ATE241030T1 (en) 2003-06-15
    EP0890670A3 (en) 2000-10-11
    DE69814748D1 (en) 2003-06-26

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