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High-gloss polyurethane resins and application thereof

A technology of polyurethane and resin, applied in the field of polyurethane resin, can solve the problems of weak adhesion, low brightness, poor heat resistance, etc., and achieve the effect of strong adhesion, high brightness and good heat resistance

Inactive Publication Date: 2010-09-15
ZHEJIANG LUOXING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a high-gloss polyurethane resin to overcome the problems of existing products such as poor heat resistance to leather or artificial leather, low brightness and weak adhesion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1 Preparation of high-gloss polyurethane resin

[0020] 30wt% poly(1,4-butylene adipate), 6wt% polytetrahydrofuran and 4wt% castor oil were mixed and dissolved in dimethylformamide (DMF), after adding 20wt% toluene diisocyanate, at 70°C Reacted for 1.5 hours, after adding 0.5wt% ethylene glycol, 0.5wt% 1,4-butanediol, 0.5wt% trimethylpropane and 0.5wt% octapentyl glycol, reacted for 2 hours at 40 ° C, then added 38wt% diphenylmethane diisocyanate was reacted at 75°C for 2.5 hours. The molecular chain distribution of the obtained product determined by GPC was 45,000±3,150Da.

Embodiment 2

[0021] Embodiment 2 Preparation of high-gloss polyurethane resin

[0022] 45wt% poly(1,4-butylene adipate), 6wt% polytetrahydrofuran and 4wt% castor oil were mixed and dissolved in dimethylformamide (DMF), after adding 20wt% toluene diisocyanate, at 70°C React for 1.5 hours, then add 1wt% ethylene glycol, 1wt% 1,4-butanediol, 1wt% trimethylpropane and 1wt% octapentyl glycol, react at 40°C for 2 hours, then add 21wt% diphenyl Methyl methane diisocyanate was reacted at 75°C for 2.5 hours. The molecular chain distribution of the obtained product determined by GPC was 45,000±3,150Da.

Embodiment 3

[0023] Embodiment 3 Preparation of high-gloss polyurethane resin

[0024] 55wt% poly(1,4-butylene adipate), 6wt% polytetrahydrofuran and 4wt% castor oil were mixed and dissolved in dimethylformamide (DMF), after adding 10wt% toluene diisocyanate, at 70°C React for 1.5 hours, then add 1wt% ethylene glycol, 1wt% 1,4-butanediol, 1wt% trimethylpropane and 1wt% octapentyl glycol, react at 40°C for 2 hours, then add 31wt% diphenyl Methyl methane diisocyanate was reacted at 75°C for 2.5 hours. The molecular chain distribution of the obtained product determined by GPC was 45,000±3,150Da.

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PUM

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Abstract

High-gloss polyurethane resins are prepared by polymerizing poly(adipate1,4-butanediol ester), polytetrahydrofuran, castor oil, diphenyl-methane diisocyanate, toluene diisocynate, ethylene glycol, 1,4-butanediol, trimethylopropane, 2,2-dimethyl-1,3-propanediol and other molecules through a body; the prepared resin has narrow molecular chain distribution. After dimethyl silicone oil and butanone are added, the resins can be used as a leather processing agent, has better leveling property on the leather and artificial leather and high luminosity. In addition, the resins have stronger adhesive force and are remarkably superior to common like products.

Description

technical field [0001] The invention relates to a leather treatment agent, in particular to a polyurethane resin, and the prepared resin is used for polishing the leather surface. Background technique [0002] Before leather can be applied, it usually needs to be treated, such as: tanning processes such as defleshing, degreasing and dyeing. In the process of tanning, a variety of treatment agents are used to make the surface of the leather have certain functions to meet the needs of actual use, such as: waterproof, bright and colorful. [0003] Invention patent 200710133165.6 relates to a preparation method of water-based polyurethane hot-melt coating adhesive for sofa artificial leather. The hot-melt coating adhesive produced by this method is mainly used for bonding textile fabrics and artificial leather materials. Use diisocyanate and ester compounds to generate prepolymers with -NCO terminal groups, then use hydrophilic monomers and 1,4-butanediol for chain extension re...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/48C08G18/42D06M15/572C14C11/00
Inventor 姚督生
Owner ZHEJIANG LUOXING IND CO LTD
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