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Brand discoloration wet-process polyurethane resin with good hydrolysis resistance

A technology of wet-process polyurethane and polyurethane resin, which is applied in the field of imprinted color-changing wet-process polyurethane resin and its preparation, which can solve the problems of insignificant pressure change effect, poor surface flatness, and poor hydrolysis resistance, and achieve strong three-dimensional effect and good hydrolysis resistance. Good aging resistance and surface smoothness

Active Publication Date: 2014-02-05
SHANGHAI HUIDE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing products of this type have disadvantages such as poor hydrolysis resistance, poor surface smoothness or insignificant pressure change effect, etc.

Method used

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  • Brand discoloration wet-process polyurethane resin with good hydrolysis resistance
  • Brand discoloration wet-process polyurethane resin with good hydrolysis resistance
  • Brand discoloration wet-process polyurethane resin with good hydrolysis resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Formula

[0024]

[0025] 2. Preparation method

[0026] In reactor, drop into polyethylene adipate-butylene glycol (number average molecular weight 1000g / mol) 112.5kg, polyethylene adipate glycol-butylene glycol (number average molecular weight 3000g / mol) mol) 37.5kg, 1,4-butanediol 25.48kg and N,N-dimethylformamide (DMF) 181kg, stir well and put in diphenylmethane-4,4'-diisocyanate (MDI) 95.9kg , the reaction temperature is controlled at 75-85°C, after 1-3 hours of reaction, when the viscosity of the reaction liquid reaches 180-200Pa·s / 50°C, put 7.5kg of hydroxyl fluorosilicone oil (number-average molecular weight 10000g / mol) into the reaction kettle, B Diol 1.95kg, MDI8kg and 570kgDMF, the reaction temperature is controlled at 75-85°C, after 1-2 hours of reaction, add the remaining amount of MDI, until the final viscosity is 25°C, 150-250Pa·s, add polyoxypropylene triol 9.88 kg, stirred evenly, and ended the reaction.

Embodiment 2

[0028] 1. Formula

[0029]

[0030]

[0031] 2. Preparation method

[0032] In reactor, drop into polyethylene adipate-butylene glycol ester diol (number average molecular weight 1000g / mol) 150kg, 1,4-butanediol 17.17kg and N, N-dimethylformamide (DMF ) 248kg, after stirring evenly, 80.9kg of diphenylmethane-4,4'-diisocyanate (MDI) was added, the reaction temperature was controlled at 75-85°C, and after 1-3 hours of reaction, the viscosity of the reaction liquid reached 150-180Pa·s / At 50°C, put 10kg of hydroxyfluorosilicone oil (number average molecular weight 16000g / mol), 1.97kg of ethylene glycol, 7kg of MDI and 503kg of DMF into the reaction kettle, and control the reaction temperature at 75-85°C. After 1-2 hours of reaction, add the remaining Amount of MDI, until the final viscosity is 150-250 Pa·s at 25°C, add 18.17 kg of polyoxypropylene triol, stir evenly, and end the reaction.

Embodiment 3

[0034] 1. Formula

[0035]

[0036] 2. Preparation method

[0037] Put 155kg of polyethylene adipate-butylene glycol ester diol (number average molecular weight 2000g / mol), 26kg of 1,4-butanediol and N,N-dimethylformamide (DMF) into the reactor 142kg, after stirring evenly, put in 82.66kg of diphenylmethane-4,4'-diisocyanate (MDI), the reaction temperature is controlled at 75-85°C, after 1-3 hours of reaction, the viscosity of the reaction liquid reaches 220-250Pa·s / 50 At ℃, put 15.5kg of hydroxyfluorosilicone oil (number average molecular weight 16000g / mol), 1.79kg of ethylene glycol, 11kg of MDI and 601.5kg of DMF into the reaction kettle, and control the reaction temperature at 75~85℃. For the remaining amount of MDI, until the final viscosity is 25°C, 150-250 Pa·s, add 19.83 kg of polyoxypropylene triol, stir evenly, and end the reaction.

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Abstract

The invention relates to a brand discoloration wet-process polyurethane resin with good hydrolysis resistance and a preparation method of the brand discoloration wet-process polyurethane resin. The polyurethane resin comprises the following components in percentage by weight: 8-15% of diphenylmethane-4, 4'-diisocyanate, 12-20% of poly(polyol adipate), 1-4% of 1, 4-butanediol, 0.05-1% of ethylene glycol, 0.3-2% of hydroxyl fluorine-silicone oil, 60-77% of N, N-dimethylformamide and 1-4% of polyoxypropylene propylene-panaxatriol. The polyurethane resin has the characteristics of good surface smoothness and good hydrolysis resistance; after the polyurethane resin is processed by using a branding process, the discoloring effects of grains on the surface of the polyurethane resin are remarkable, and the polyurethane resin has a strong stereoscopic impression.

Description

technical field [0001] The invention relates to the technical field of polyurethane resin preparation, and more specifically relates to a wet-process polyurethane resin with good hydrolysis resistance and brand-changing discoloration and a preparation method. Background technique [0002] With the development of synthetic leather technology, today's synthetic leather materials are getting closer to the characteristics of natural leather. How to make synthetic leather feel closer to natural leather and have richer textures to meet the growing needs of consumers has become an issue. research focus in the field. Due to people's growing needs, high-tech digital, intelligent, and networked new technology 3C products emerge in an endless stream. Subsequently, the packaging shell materials of 3C products with good performance have also attracted the attention and attention of merchants and consumers. . People not only require such packaging materials to have a good protective eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/61C08G18/48C08G18/42C08G18/32C08G18/12
CPCC08G18/12C08G18/4009C08G18/4829C08G18/61C08G18/664C08G18/6674C08G18/6511
Inventor 钱建中钱洪祥巩倩邹文革陈芳英岩岩
Owner SHANGHAI HUIDE TECH CO LTD
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