Chromatophilous polyurethane resin for synthetic leather and preparation method of polyurethane resin

A polyurethane resin and synthetic leather technology, applied in textiles and paper making, etc., can solve the problems of large dyeing difference, difficult dyeing of synthetic leather, different structure, etc., and achieve good wear resistance and adhesion, good breathability, and strong leather feel. Effect

Active Publication Date: 2013-04-10
JIANDE BAISHA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, nylon microfibers and polyurethane (PU) resins in superfine fiber synthetic leather have different structures and large dyeing differences, which has caused difficulties in dyeing synthetic leather.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: polyester polyol EG1000 is 20%, polyester polyol PCL2000 is 3.5%, xylylene diisocyanate MDI is 18.5%, epoxy resin is 0.15%, triphenyl phosphite is 0.05%, Dibutyltin dilaurate is 0.02%, silicone oil is 0.01%, ethylene glycol is 0.85%, 1,4-butanediol is 3%, ethanol is 0.6%, and the rest is solvent. The solvent formula is: dimethylformamide DMF is 20%, butanone is 18%, and the rest is toluene.

[0028] The preparation method of this easily dyeable synthetic leather polyurethane resin of the present invention, the steps are as follows: earlier polyester polyol EG1000, polyester polyol PCL2000, ethylene glycol, 1,4-butanediol, epoxy resin , triphenyl phosphite and dibutyltin dilaurate were added to the reactor and dehydrated at 120°C for 1 hour; cooled to 60°C and added half of the amount of xylylene diisocyanate MDI, prepolymerized at 80~85°C for 2 hours, and the remaining Add xylene methylene diisocyanate MDI in 4~5 times, adding once every 40 minutes; after...

Embodiment 2

[0030] Embodiment 2: polyester polyol EG1000 is 15%, polyester polyol PCL2000 is 5%, xylene methylene diisocyanate MDI is 16%, epoxy resin is 0.1%, triphenyl phosphite is 0.05%, Dibutyltin dilaurate is 0.02%, silicone oil is 0.01%, ethylene glycol is 0.8%, 1,4-butanediol is 2.2%, ethanol is 0.45%, and the rest is a solvent. The solvent formula is: dimethylformamide DMF is 24%, butanone is 16%, and the rest is toluene.

[0031] The formulation of this example is especially suitable for the dyeing and discoloration treatment of shoe leather.

example 3

[0032] Example 3: 20% of polyester polyol EG1000, 5% of polyester polyol PCL2000, 20% of xylylene methylene diisocyanate MDI, 0.2% of epoxy resin, 0.05% of triphenyl phosphite, two Dibutyltin laurate is 0.02%, silicone oil is 0.01%, ethylene glycol is 1.5%, 1,4-butanediol is 3%, ethanol is 0.6%, and the rest is solvent. The solvent formula is: dimethylformamide DMF 25% for butanone, 16% for methyl ethyl ketone, and the rest for toluene.

[0033] Instructions:

[0034] 1. Put the product of the present invention on the white bass (can be embossed), and dilute the resin with ethyl acetate, butyl ester, DMF, and toluene;

[0035] 2. Take 1g of dye and 140g of water and mix well, heat up to 50°C, then add the pasted leather surface, stir or turn it over and keep it warm for about 10 minutes or take out the leather when it reaches the desired color;

[0036] 3. Rinse the leather in clean water with a slip agent for 3 minutes, then put it into a dry kneading machine and knead it d...

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PUM

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Abstract

The invention relates to chromatophilous polyurethane resin for synthetic leather and a preparation method of the polyurethane resin. The polyurethane resin comprises the following components by mass percentage: 15-20% of polyester polyol EG1000, 3-5% of polyester polyol PCL2000, 15-20% of diphenyl-methane-diisocyanate (MDI), 0.1-0.2% of epoxy resin, 0.05% of triphenyl phosphite, 0.02% of dibutyltin dilaurate, 0.01% of silicone oil, 0.8-1.5% of glycol, 2-3% of 1,4-butanediol, 0.4-0.6% of alcohol, and the balance of solvent, wherein the solvent comprises the following components by mass percentage: 20-25% of dimethyl formamide (DMF), 15-20% of butanone, and the balance of methylbenzene. The chromatophilous polyurethane resin for the synthetic leather and the preparation method have the benefits that the polyurethane resin synthesized by the preparation method is chromatophilous, high in fixation, and uniform in coloring, and has good mechanical properties such as water resistance, solvent resistance, cold resistance and folding resistance after being produced into the leather.

Description

technical field [0001] The invention relates to a dyed resin for synthetic leather and a preparation method thereof, in particular to a polyurethane resin for easily dyed synthetic leather and a preparation method thereof. Background technique [0002] Leather is an indispensable material for human beings. With the development of society, human beings pay more and more attention to environmental protection and animal protection, so the use of natural leather is limited. As a result, artificial leather and synthetic leather replacing natural leather have been greatly developed, especially PU synthetic leather, because of its various excellent properties, it has become the best choice to replace natural leather. [0003] At present, synthetic leather has largely replaced natural leather with insufficient resources, and is used to make bags, clothing, shoes, decorations for vehicles and furniture, etc., and has broad development prospects. Microfiber synthetic leather is a hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/61C08G18/58C08G18/42C08G18/32C08G18/30C08G18/24C08G18/12C08K5/526D06N3/14
Inventor 胡水仙朱张林
Owner JIANDE BAISHA CHEM
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