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Production method of waterborne polyurethane used for artificial leather bonding resin

A technology of water-based polyurethane and bonding resin, which is applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of polyurethane initial adhesion and durability without comprehensive consideration, and achieve low labor intensity, High solid content, good hydrolysis resistance

Inactive Publication Date: 2013-09-25
ZHEJIANG JOYA POLYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the initial adhesion and durability of polyurethane are not considered comprehensively

Method used

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  • Production method of waterborne polyurethane used for artificial leather bonding resin
  • Production method of waterborne polyurethane used for artificial leather bonding resin
  • Production method of waterborne polyurethane used for artificial leather bonding resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The first step, the preparation of water-based polyurethane A: put 650g of polyadipate and 1,4 butanediol ester polyol into the reactor to polymerize to obtain polyester polyol with a molecular weight of 2000, seal it, raise the temperature to 100°C, and React under 0.1MPa vacuum and pump water for 30 minutes, cool down to 80°C, put in 225.25g of isophorone diisocyanate, 24.55g of 1,4-butanediol and 80g of sulfonic acid polyether polyol, heat up to 100°C for reaction , react until the measured NCO% value is 2.01%; then cool down to 70°C, add 1500g of water at 1000 revolutions per minute, stir at high speed to disperse, reduce the speed to 200 revolutions per minute, then add 20.2g of piperazine, At 50°C, until the NCO group disappears (FT-IR measurement), the reaction is terminated after the final stirring, the solid content of the produced water-based polyurethane is 40%, and the Brookfield viscosity is 20cPs (1#, 30min / r, 25 ℃);

[0018] In the second step, the prepa...

Embodiment 2

[0020]The first step, the preparation of water-based polyurethane A: put 650g of polyadipate and 1,4 butanediol ester polyol into the reactor to polymerize to obtain polyester polyol with a molecular weight of 2000, seal it, raise the temperature to 100°C, and React under 0.1MPa vacuum and pump water for 30 minutes, cool down to 70°C, put in 207.36g of 1,6-hexamethylene diisocyanate, 26.82g of 1,4-butanediol and 70g of sulfonic polyether polyol, heat up to 90°C for reaction , react until the measured NCO% value is 2.37%; then cool down to 70°C, add 2757g of water at 1000 rpm, and stir at high speed to disperse. In the prepolymer, a total of 45.83g of isophorone diamine (IPDA) needs to be added, diluted with 100g of water, and isophorone diamine (IPDA) is slowly added within 10 minutes. Then cool down to 50°C until the NCO group disappears, and the reaction is terminated after stirring at last;

[0021] The solid content of the produced waterborne polyurethane is 35%, Brookfie...

Embodiment 3

[0025] The same steps as in Example 1 were used to obtain water-based polyurethane resin A and water-based polyurethane resin B.

[0026] Prepare according to the proportion of 60% water-based polyurethane A and 40% water-based polyurethane B.

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Abstract

The invention discloses an artificial leather bonding resin, and especially relates to a production method of a waterborne polyurethane. The object of the invention is to make up the defect existing in a previous method, and provide the production method of the waterborne polyurethane used for the artificial leather bonding resin, and the waterborne polyurethane has the advantages of good storage stability, high solid content, stable physical properties, regular resin chains, good initial adhesion and good durability. The waterborne polyurethane is prepared by preparing a waterborne polyurethane A, preparing a waterborne polyurethane B, and mixing the waterborne polyurethane A and the waterborne polyurethane B by weight ratio; and the waterborne polyurethane A accounts for 40-70%. The production method of the waterborne polyurethane is characterized by simple process, convenient operation, low labor intensity and the like.

Description

technical field [0001] The invention relates to an artificial leather adhesive resin, in particular to a production method of waterborne polyurethane. Background technique [0002] At present, polyurethane adhesives have been widely used in the shoe industry due to their excellent bonding properties. However, most domestic polyurethane adhesives for shoes are solvent-based, and toxic and harmful organic solvents are likely to cause environmental pollution and damage human life. Water-based polyurethane adhesive has the advantages of non-toxic, non-flammable, non-polluting, energy-saving, safe and reliable, not easy to damage the surface to be painted, suitable for materials that are easily eroded by organic solvents, easy to operate and modify, making it suitable for fabrics and leathers. And wood adhesives and other fields have been widely used, and are gradually replacing solvent-based polyurethane. Patent application number 201210237783 discloses a method for preparing ...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J175/06C08G18/66C08G18/42C08G18/50C08G18/32
Inventor 贝文理林曦赵亮
Owner ZHEJIANG JOYA POLYMER TECH
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