CN104497951A - Water-based polyurethane leather adhesive - Google Patents
Water-based polyurethane leather adhesive Download PDFInfo
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- CN104497951A CN104497951A CN201410776170.9A CN201410776170A CN104497951A CN 104497951 A CN104497951 A CN 104497951A CN 201410776170 A CN201410776170 A CN 201410776170A CN 104497951 A CN104497951 A CN 104497951A
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Abstract
The invention discloses a water-based polyurethane adhesive which is prepared from isophorone diisocyanate, polyethylene glycol adipate diol, ethylene glycol, 2,2-dimethylolpropionic acid, scrap rubber nano micropowder, deionized water and triethylamine. The scrap rubber nano micropowder added in the formula enhances the solid content of the adhesive, lowers the water content and shortens the drying and curing time; and the scrap rubber nano micropowder has huge surface energy, and can enhance the intermolecular binding force of the adhesive and the binding force between the adhesive and leather surface, thereby greatly enhancing the binding strength of the adhesive. The scrap rubber nano micropowder is prepared from waste rubber products by impurity removal and superfine grinding to nano-scale superfine micropowder, thereby implementing reutilization of resources. The water-based polyurethane adhesive has the characteristics of proper solid content, short drying time, high curing rate, high binding strength, low cost and the like.
Description
Technical field
The present invention relates to a kind of leather adhesive, specifically a kind of aqueous polyurethane leather adhesive.
Background technology
Along with the development of technology, leatherware has achieved diversified production, has enriched the life of people.In the leatherware course of processing, the bonding of leather processing is an important operation, and leather adhesive have impact on the quality of leatherware.
Polyurethane binder refers to the tackiness agent containing carbamate groups (-NHCOO-) or isocyanate group (-NCO) in molecular chain.Polyurethane binder is divided into polyisocyanates and the large class of urethane two, and containing isocyano-(-NCO) and carbamate groups (-NH-COO-) in polyisocyanate molecule chain, therefore polyurethane binder shows activity and the polarity of height.With the base material containing reactive hydrogen, as porous materials such as foam, plastics, timber, leather, fabric, paper, potteries, and the material of any surface finish such as metal, glass, rubber, plastics has excellent chemical adhesive power.
Polyurethane binder mainly contains solvent-borne type and water-based two class.The feature such as aqueous polyurethane adhesive aqueous polyurethane adhesive has low VOC content, low or non-environmental-pollution, do not fire is the prior development direction of polyurethane binder.
There is the lower deficiency of solid content in the existing aqueous polyurethane adhesive for leather bonds processing, often only have about 40%, easily cause length time of drying, solidification for a long time, and water tolerance cohesive strength and the shortcoming such as mechanical property is not ideal enough, and increase raising solid content simply often can cause performed polymer viscosity excessive, thus cause emulsion dispersion difficulty, easy gel.
Summary of the invention
The object of this invention is to provide a kind of aqueous polyurethane adhesive, this aqueous polyurethane adhesive has suitable solid content, and time of drying is short, and solidification rate is high, and bonding strength is large, the features such as cost is low.
Technical scheme of the present invention is as follows: a kind of aqueous polyurethane adhesive, by following raw material: isophorone diisocyanate, polyethylene glycol adipate glycol, ethylene glycol, 2,2-dimethylol propionic acid, waste rubber nano powder, deionized water, triethylamine, adopt following steps preparation:
(1) polyethylene glycol adipate glycol, isophorone diisocyanate are joined in there-necked flask according to the ratio of OH:NCO=1:2, pass into nitrogen, reactant is stirred, at 100 ~ 120 DEG C of reaction 2 ~ 3h, obtained base polyurethane prepolymer for use as, add 2/3rds of ethylene glycol consumption again, continue reaction 1h;
(2) be cooled to 90 ~ 100 DEG C, add waste rubber nano powder and remaining glycol reaction 5 ~ 10min, then add triethylamine reaction 6 ~ 10min;
(3) add the emulsion emulsification 1 ~ 2h of 2,2-dimethylol propionic acid, deionized water, namely obtain.
The consumption of described ethylene glycol is 0.4 ~ 0.6% of polyurethane prepolymer weight.
Described waste rubber nano powder consumption is 0.1 ~ 10% of polyurethane prepolymer weight.
The particle diameter of described waste rubber nano powder 0.1 ~ 10 μm.
Described triethylamine consumption is 3 ~ 6% of polyurethane prepolymer weight.
In described emulsion, the usage ratio of 2,2-dimethylol propionic acid, water is mass ratio 1:2 ~ 4, and emulsion consumption is 40 ~ 50% of performed polymer quality.
The present invention is as follows relative to the beneficial effect of prior art: the present invention by adding waste rubber nano powder in formula, improve the solid content of tackiness agent, reduce water ratio, shorten the dry solidification time, and waste rubber nano powder has huge surface energy, can strengthen bonding force between binder molecule and and bonding force between tackiness agent and leather surface, thus the bonding strength of tackiness agent can be improved significantly; The waste rubber nano powder adopted through purification and impurity removal, micronizing extremely nano level superfine powder, can realize the second stage employ of resource by waste rubber goods.
Embodiment
Be described in further details the present invention below by embodiment, these embodiments are only used for the present invention is described, do not limit the scope of the invention.
Embodiment 1 adopts following steps to prepare a kind of aqueous polyurethane adhesive:
(1) polyethylene glycol adipate glycol, isophorone diisocyanate are joined in there-necked flask according to the ratio of OH:NCO=1:2, pass into nitrogen, reactant is stirred, at 110 DEG C of reaction 2.5h, obtained base polyurethane prepolymer for use as, add 2/3rds of ethylene glycol consumption again, continue reaction 1h; The consumption of ethylene glycol is 0.5% of polyurethane prepolymer weight;
(2) be cooled to 95 DEG C, add the waste rubber nano powder of particle diameter 0.1 ~ 10 μm and remaining glycol reaction 6min, then add triethylamine reaction 5min; Waste rubber nano powder consumption is 5% of polyurethane prepolymer weight; Triethylamine consumption is 3% of polyurethane prepolymer weight;
(3) emulsion is obtained by 2,2-dimethylol propionic acid, deionized water according to mass ratio 1:3;
(4) get the above-mentioned emulsion of performed polymer quality 40%, add emulsion reaction 1.5h in the reactant of step (2), namely obtain.
Embodiment 2 adopts following steps to prepare a kind of aqueous polyurethane adhesive:
(1) polyethylene glycol adipate glycol, isophorone diisocyanate are joined in there-necked flask according to the ratio of OH:NCO=1:2, pass into nitrogen, reactant is stirred, at 100 DEG C of reaction 3h, obtained base polyurethane prepolymer for use as, then add 2/3rds of ethylene glycol consumption, continue reaction 1h; The consumption of ethylene glycol is 0.6% of polyurethane prepolymer weight;
(2) be cooled to 90 DEG C, add the waste rubber nano powder of particle diameter 0.1 ~ 10 μm and remaining glycol reaction 5min, then add triethylamine reaction 10min; Waste rubber nano powder consumption is 1% of polyurethane prepolymer weight; Triethylamine consumption is 6% of polyurethane prepolymer weight;
(3) emulsion is obtained by 2,2-dimethylol propionic acid, deionized water according to mass ratio 1:4;
(4) get the above-mentioned emulsion of performed polymer quality 50%, add emulsion reaction 1h in the reactant of step (2), namely obtain.
Embodiment 3 adopts following steps to prepare a kind of aqueous polyurethane adhesive:
(1) polyethylene glycol adipate glycol, isophorone diisocyanate are joined in there-necked flask according to the ratio of OH:NCO=1:2, pass into nitrogen, reactant is stirred, at 120 DEG C of reaction 2h, obtained base polyurethane prepolymer for use as, then add 2/3rds of ethylene glycol consumption, continue reaction 1h; The consumption of ethylene glycol is 0.4% of polyurethane prepolymer weight;
(2) be cooled to 100 DEG C, add the waste rubber nano powder of particle diameter 0.1 ~ 10 μm and remaining glycol reaction 10min, then add triethylamine reaction 6min; Waste rubber nano powder consumption is 7% of polyurethane prepolymer weight; Triethylamine consumption is 5% of polyurethane prepolymer weight;
(3) emulsion is obtained by 2,2-dimethylol propionic acid, deionized water according to mass ratio 1:2;
(4) get the above-mentioned emulsion of performed polymer quality 45%, add emulsion reaction 2h in the reactant of step (2), namely obtain.
Claims (6)
1. an aqueous polyurethane adhesive, it is characterized in that: be by following raw material: isophorone diisocyanate, polyethylene glycol adipate glycol, ethylene glycol, 2,2-dimethylol propionic acid, waste rubber nano powder, deionized water, triethylamine, adopt following steps preparation:
(1) polyethylene glycol adipate glycol, isophorone diisocyanate are joined in there-necked flask according to the ratio of OH:NCO=1:2, pass into nitrogen, reactant is stirred, at 100 ~ 120 DEG C of reaction 2 ~ 3h, obtained base polyurethane prepolymer for use as, add 2/3rds of ethylene glycol consumption again, continue reaction 1h;
(2) be cooled to 90 ~ 100 DEG C, add waste rubber nano powder and remaining glycol reaction 5 ~ 10min, then add triethylamine reaction 6 ~ 10min;
(3) add the emulsion emulsification 1 ~ 2h of 2,2-dimethylol propionic acid, deionized water, namely obtain.
2. aqueous polyurethane adhesive according to claim 1, is characterized in that: described waste rubber nano powder consumption is 0.1 ~ 10% of polyurethane prepolymer weight.
3. aqueous polyurethane adhesive according to claim 1 and 2, is characterized in that: the particle diameter of described waste rubber nano powder 0.1 ~ 10 μm.
4. aqueous polyurethane adhesive according to claim 1, is characterized in that: the consumption of described ethylene glycol is 0.4 ~ 0.6% of polyurethane prepolymer weight.
5. aqueous polyurethane adhesive according to claim 1, is characterized in that: described triethylamine consumption is 3 ~ 6% of polyurethane prepolymer weight.
6. aqueous polyurethane adhesive according to claim 1, is characterized in that: in described emulsion, and the usage ratio of 2,2-dimethylol propionic acid, water is mass ratio 1:2 ~ 4, and emulsion consumption is 40 ~ 50% of performed polymer quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410776170.9A CN104497951A (en) | 2014-12-17 | 2014-12-17 | Water-based polyurethane leather adhesive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410776170.9A CN104497951A (en) | 2014-12-17 | 2014-12-17 | Water-based polyurethane leather adhesive |
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| CN104497951A true CN104497951A (en) | 2015-04-08 |
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| CN201410776170.9A Pending CN104497951A (en) | 2014-12-17 | 2014-12-17 | Water-based polyurethane leather adhesive |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101121869A (en) * | 2007-09-21 | 2008-02-13 | 北京市化学工业研究院 | Method for preparing water polyurethane binder for shoe |
| CN101348703A (en) * | 2008-06-20 | 2009-01-21 | 中山大学 | Aqueous polyurethane adhesive and preparation thereof |
| US20090240004A1 (en) * | 2006-09-29 | 2009-09-24 | Alois Maier | Functionalized polyurethane resin, method for the production thereof, and use thereof |
| CN101824294A (en) * | 2010-04-30 | 2010-09-08 | 安徽安大华泰新材料有限公司 | Preparation method of tetrabasic copolymerized waterborne polyurethane automotive interior adhesive |
| CN102618204A (en) * | 2012-04-01 | 2012-08-01 | 江阴市诺科科技有限公司 | Hot-melt adhesive for bonding layer of artificial leather and preparation method as well as application thereof |
-
2014
- 2014-12-17 CN CN201410776170.9A patent/CN104497951A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090240004A1 (en) * | 2006-09-29 | 2009-09-24 | Alois Maier | Functionalized polyurethane resin, method for the production thereof, and use thereof |
| CN101121869A (en) * | 2007-09-21 | 2008-02-13 | 北京市化学工业研究院 | Method for preparing water polyurethane binder for shoe |
| CN101348703A (en) * | 2008-06-20 | 2009-01-21 | 中山大学 | Aqueous polyurethane adhesive and preparation thereof |
| CN101824294A (en) * | 2010-04-30 | 2010-09-08 | 安徽安大华泰新材料有限公司 | Preparation method of tetrabasic copolymerized waterborne polyurethane automotive interior adhesive |
| CN102618204A (en) * | 2012-04-01 | 2012-08-01 | 江阴市诺科科技有限公司 | Hot-melt adhesive for bonding layer of artificial leather and preparation method as well as application thereof |
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Application publication date: 20150408 |