CN104497952A - High-water-resistance leather adhesive - Google Patents
High-water-resistance leather adhesive Download PDFInfo
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- CN104497952A CN104497952A CN201410776217.1A CN201410776217A CN104497952A CN 104497952 A CN104497952 A CN 104497952A CN 201410776217 A CN201410776217 A CN 201410776217A CN 104497952 A CN104497952 A CN 104497952A
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- water resistance
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- neopentyl glycol
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Abstract
The invention discloses a high-water-resistance leather adhesive which is prepared from hydrogenated diphenylmethane diisocyanate, poly-adipic acid-1,4-butanediol ester diol, neopentyl glycol, 2,2-dimethylolpropionic acid, deionized water, triethylamine and carboxyl butadiene styrene rubber. In the formula, the neopentyl glycol with branched chain is adopted to enhance the water resistance. By adding the 2,2-dimethylolpropionic acid, the polyurethane has favorable self-emulsifying effect and favorable emulsion adhesive force. The carboxyl butadiene styrene rubber can interact with the 2,2-dimethylolpropionic acid to enhance the water resistance, binding strength and solid content and endow the adhesive with favorable stability. The prepolymer formed by the preparation process in the method forms a crosslinked structure, thereby further enhancing the water resistance. The adhesive film formed by the prepared water-based polyurethane is soft.
Description
Technical field
The present invention relates to a kind of leather adhesive, specifically a kind of enhanced water resistance 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 has low VOC content, low or non-environmental-pollution, do not fire is the prior development direction of polyurethane binder.
Aqueous polyurethane refers to that urethane is dissolved or dispersed in water, and a kind of urethane resin formed.Aqueous polyurethane needs certain its emulsion intercalation method of water-soluble guarantee, and contain water-based group due to aqueous polyurethane, cause again its water tolerance poor, for leather bonds, still there is the deficiency of bonding strength, when leatherware is running in the larger wet environment of moisture content, easily occurring that the cracking of bonding place or tackiness agent are separated with leather, have impact on the use of leatherware, attractive in appearance and quality.
Summary of the invention
The object of this invention is to provide a kind of enhanced water resistance leather adhesive, this tackiness agent has the features such as water tolerance is good, solid content is high, emulsion adhesive ability is strong, cohesive strength is large.
Technical scheme of the present invention is as follows: a kind of enhanced water resistance leather adhesive, by following raw material: hydrogenated diphenyl methane diisocyanate, poly-hexanodioic acid-1,4-butanediol ester glycol, neopentyl glycol, 2,2-dimethylol propionic acid, deionized water, triethylamine, carboxy styrene-butadiene rubber, adopt following steps preparation:
(1) hexanodioic acid-1 will be gathered, 4-butanediol ester glycol, hydrogenated diphenyl methane diisocyanate join in there-necked flask according to the ratio of OH:NCO=1:1.5, pass into nitrogen, reactant is stirred, at 90 ~ 100 DEG C of reaction 1 ~ 2h, obtained base polyurethane prepolymer for use as, then add neopentyl glycol, continue reaction 1 ~ 2h;
(2) be cooled to 60 ~ 70 DEG C, add triethylamine reaction 5min; Add carboxy styrene-butadiene rubber, 2,2-dimethylol propionic acids, deionized water reaction 1 ~ 2h again, namely obtain.
The consumption of described neopentyl glycol is 2 ~ 5% of polyurethane prepolymer weight.
Described triethylamine consumption is 0.5 ~ 1% of polyurethane prepolymer weight.
Described 2,2-dimethylol propionic acid consumptions are 12 ~ 24% of performed polymer quality.
Described carboxy styrene-butadiene rubber consumption is 5 ~ 11% of performed polymer quality.
Described deionized water consumption is 30 ~ 40% of performed polymer quality.
The present invention is as follows relative to the beneficial effect of prior art: in the present invention's formula, adopt the neopentyl glycol having side chain, improve water tolerance, in formula, adding of 2,2-dimethylol propionic acids can make urethane have good self-emulsifying effect, and emulsion sticking power is good; Carboxy styrene-butadiene rubber can with the effect of 2,2-dimethylol propionic acid, strengthen water tolerance, cohesive strength and raising solid content, and give satisfactory stability.Adopt the performed polymer formation crosslinking structure that the inventive method is formed in preparation process, further increase water tolerance, and obtained aqueous polyurethane is when film forming, the glued membrane of formation is softer.
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 enhanced water resistance leather adhesive of the present invention:
(1) hexanodioic acid-1 will be gathered, 4-butanediol ester glycol, hydrogenated diphenyl methane diisocyanate join in there-necked flask according to the ratio of OH:NCO=1:1.5, pass into nitrogen, reactant is stirred, at 100 DEG C of reaction 1h, obtained base polyurethane prepolymer for use as, then add the neopentyl glycol of polyurethane prepolymer weight 5%, continue reaction 2h;
(2) be cooled to 70 DEG C, add the triethylamine reaction 5min of performed polymer quality 1%; Add the carboxy styrene-butadiene rubber of performed polymer quality 5%, 2,2-dimethylol propionic acids of performed polymer quality 24%, the deionized water reaction 2h of performed polymer quality 30% again, namely obtain.
Embodiment 2 adopts following steps to prepare enhanced water resistance leather adhesive of the present invention:
(1) hexanodioic acid-1 will be gathered, 4-butanediol ester glycol, hydrogenated diphenyl methane diisocyanate join in there-necked flask according to the ratio of OH:NCO=1:1.5, pass into nitrogen, reactant is stirred, at 90 DEG C of reaction 2h, obtained base polyurethane prepolymer for use as, then add the neopentyl glycol of polyurethane prepolymer weight 3%, continue reaction 2h;
(2) be cooled to 60 DEG C, add the triethylamine reaction 5min of performed polymer quality 1%; Add the carboxy styrene-butadiene rubber of performed polymer quality 7%, 2,2-dimethylol propionic acids of performed polymer quality 16%, the deionized water reaction 2h of performed polymer quality 32% again, namely obtain.
Embodiment 3 adopts following steps to prepare enhanced water resistance leather adhesive of the present invention:
(1) hexanodioic acid-1 will be gathered, 4-butanediol ester glycol, hydrogenated diphenyl methane diisocyanate join in there-necked flask according to the ratio of OH:NCO=1:1.5, pass into nitrogen, reactant is stirred, at 100 DEG C of reaction 2h, obtained base polyurethane prepolymer for use as, then add the neopentyl glycol of polyurethane prepolymer weight 5%, continue reaction 1h;
(2) be cooled to 70 DEG C, add the triethylamine reaction 5min of performed polymer quality 0.5%; Add the carboxy styrene-butadiene rubber of performed polymer quality 11%, 2,2-dimethylol propionic acids of performed polymer quality 12%, the deionized water reaction 1h of performed polymer quality 40% again, namely obtain.
Claims (6)
1. an enhanced water resistance leather adhesive, it is characterized in that: be by following raw material: hydrogenated diphenyl methane diisocyanate, poly-hexanodioic acid-1,4-butanediol ester glycol, neopentyl glycol, 2,2-dimethylol propionic acids, deionized water, triethylamine, carboxy styrene-butadiene rubber, adopt following steps preparation:
(1) hexanodioic acid-1 will be gathered, 4-butanediol ester glycol, hydrogenated diphenyl methane diisocyanate join in there-necked flask according to the ratio of OH:NCO=1:1.5, pass into nitrogen, reactant is stirred, at 90 ~ 100 DEG C of reaction 1 ~ 2h, obtained base polyurethane prepolymer for use as, then add neopentyl glycol, continue reaction 1 ~ 2h;
(2) be cooled to 60 ~ 70 DEG C, add triethylamine reaction 5min; Add carboxy styrene-butadiene rubber, 2,2-dimethylol propionic acids, deionized water reaction 1 ~ 2h again, namely obtain.
2. enhanced water resistance leather adhesive according to claim 1, is characterized in that: the consumption of described neopentyl glycol is 2 ~ 5% of polyurethane prepolymer weight.
3. enhanced water resistance leather adhesive according to claim 1, is characterized in that: described triethylamine consumption is 0.5 ~ 1% of polyurethane prepolymer weight.
4. enhanced water resistance leather adhesive according to claim 1, is characterized in that: described 2,2-dimethylol propionic acid consumptions are 12 ~ 24% of performed polymer quality.
5. enhanced water resistance leather adhesive according to claim 1, is characterized in that: described carboxy styrene-butadiene rubber consumption is 5 ~ 11% of performed polymer quality.
6. enhanced water resistance leather adhesive according to claim 1, is characterized in that: described deionized water consumption is 30 ~ 40% of performed polymer quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410776217.1A CN104497952A (en) | 2014-12-17 | 2014-12-17 | High-water-resistance leather adhesive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410776217.1A CN104497952A (en) | 2014-12-17 | 2014-12-17 | High-water-resistance leather adhesive |
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| CN104497952A true CN104497952A (en) | 2015-04-08 |
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| CN201410776217.1A Pending CN104497952A (en) | 2014-12-17 | 2014-12-17 | High-water-resistance leather adhesive |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328383A (en) * | 2008-07-17 | 2008-12-24 | 安徽大学 | Production method for liner gloves aqueous polyurethane coating connection material |
| CN103031732A (en) * | 2012-12-07 | 2013-04-10 | 青岛文创科技有限公司 | Preparation method of waterborne polyurethane leather glue |
| CN103044652A (en) * | 2013-01-05 | 2013-04-17 | 旭川化学（苏州）有限公司 | High-gloss water-base polyurethane resin for synthetic leather and preparation method of high-gloss water-base polyurethane resin |
-
2014
- 2014-12-17 CN CN201410776217.1A patent/CN104497952A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328383A (en) * | 2008-07-17 | 2008-12-24 | 安徽大学 | Production method for liner gloves aqueous polyurethane coating connection material |
| CN103031732A (en) * | 2012-12-07 | 2013-04-10 | 青岛文创科技有限公司 | Preparation method of waterborne polyurethane leather glue |
| CN103044652A (en) * | 2013-01-05 | 2013-04-17 | 旭川化学（苏州）有限公司 | High-gloss water-base polyurethane resin for synthetic leather and preparation method of high-gloss water-base polyurethane resin |
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Application publication date: 20150408 |