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Super-soft and super-cotton type hydrolysis-resistant wet polyurethane resin and preparation method thereof

A wet-process polyurethane and super cotton technology, which is applied in the field of polyurethane resin materials for synthetic leather and materials for synthetic leather, can solve the problems of short storage time, resin viscosity reduction, etc., achieve soft hand feeling, prevent resin viscosity reduction, and good hand feeling Effect

Active Publication Date: 2020-01-14
ZHEJIANG HUAFON SYNTHETIC RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Patent CN201510778203.8 discloses a polyurethane nubuck resin for garment leather with high resilience and high velvet feel and its preparation method. The polypolyol is polybutylene adipate-diethylene glycol ester diol, poly Carbonate diol, double-end hydroxyl polyether modified silicone oil, double-end hydroxyl polyether modified silicone oil is added in the chain growth reaction, the nubuck leather produced by this invention has high resilience, fine and vertical cells, and strong cashmere feeling , good weather resistance, etc., but the disadvantage is that the viscosity of the resin prepared by this method decreases significantly during storage, and the storage time is short

Method used

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  • Super-soft and super-cotton type hydrolysis-resistant wet polyurethane resin and preparation method thereof
  • Super-soft and super-cotton type hydrolysis-resistant wet polyurethane resin and preparation method thereof
  • Super-soft and super-cotton type hydrolysis-resistant wet polyurethane resin and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The weight percent of each component is as follows:

[0025]

[0026] Described hydroxy silicone oil adopts the 8858 model product of Guangzhou Siluoke Chemical Co., Ltd.;

[0027] The preparation method comprises the following steps:

[0028] 1) Prepolymerization reaction: Mix part of diisocyanate, polyether glycol mixture, castor oil, and part of N,N-dimethylformamide for reaction, control the solid content of the reaction solution to 50.3%, and react at 70°C 2 hours, the prepolymerization reaction finishes;

[0029] The part of diisocyanate is 60% of the total weight of diisocyanate;

[0030] The part of N,N-dimethylformamide is 30% of the total weight of N,N-dimethylformamide;

[0031] 2) Chain extension reaction: add chain extender and remaining N,N-dimethylformamide, react for 0.5 hours, add remaining diisocyanate to carry out chain extension reaction, reaction liquid viscosity reaches 190Pa·s / 25℃, add hydroxyl silicone oil Capped, the reaction ends.

Embodiment 2

[0033] The weight percent of each component is as follows:

[0034]

[0035] Described hydroxyl silicone oil adopts the BYK-16-201 model product of BYK chemical company;

[0036] The preparation method comprises the following steps:

[0037] 1) Prepolymerization reaction: Mix part of diisocyanate, polyether glycol mixture, castor oil, and part of N,N-dimethylformamide for reaction, control the solid content of the reaction solution to 54.1%, and react at 80°C 3 hours, the prepolymerization reaction finishes;

[0038] The part of diisocyanate is 60% of the total weight of diisocyanate;

[0039] The part of N,N-dimethylformamide is 50% of the total weight of N,N-dimethylformamide;

[0040] 2) Chain extension reaction: add chain extender and remaining N,N-dimethylformamide, react for 1 hour, add remaining diisocyanate for chain extension reaction, reaction liquid viscosity reaches 250Pa·s / 25℃, add hydroxyl silicone oil Capped, the reaction ends.

Embodiment 3

[0042] The weight percent of each component is as follows:

[0043]

[0044] Described hydroxyl silicone oil adopts the BYK-16-004 model product of BYK chemical company;

[0045] The preparation method comprises the following steps:

[0046] 1) Prepolymerization reaction: Mix part of diisocyanate, polyether glycol mixture, castor oil, and part of N,N-dimethylformamide for reaction, control the solid content of the reaction solution to 53.2%, and react at 75°C 2.5 hours, the prepolymerization reaction finishes;

[0047] The part of diisocyanate is 65% of the total weight of diisocyanate;

[0048] The part of N,N-dimethylformamide is 40% of the total weight of N,N-dimethylformamide;

[0049] 2) Chain extension reaction: add chain extender and remaining N,N-dimethylformamide, react for 1 hour, add remaining diisocyanate for chain extension reaction, reaction solution viscosity reaches 220Pa·s / 25℃, add hydroxyl silicone oil Capped, the reaction ends.

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Abstract

The invention discloses an ultra-soft and ultra-cotton type hydrolysis-resistant wet polyurethane resin and a preparation method thereof. The invention relates to an ultra-soft and ultra-cotton hydrolysis-resistant wet polyurethane resin, which is prepared by comprising the following components by weight percent: 3.0% to 10.5% of diisocyanate, 20.0% to 27.0% of polyether glycol mixture, 0.5% to 1.5% of chain extender, and 58.5% to 75.0% of N, N-dimethylformamide, 0.5% to 1.5% of castor oil and 0.5% to 1.5% of hydroxyl silicone oil. The synthetic leather prepared by the invention has soft handfeeling and strong cotton feeling. In addition, the addition of hydroxyl silicone oil in the chain termination stage can effectively prevent silicone oil from precipitating fog and resin viscosity reduction during storage. At the same time, because hydroxyl silicone oil is linked on the polyurethane main chain to form a hydrophobic layer, sweat erosion can be prevented and hydrolysis resistance can be further enhanced.

Description

technical field [0001] The invention relates to a super-soft and super-cotton type hydrolysis-resistant wet-process polyurethane resin and a preparation method thereof, belonging to the technical field of materials for synthetic leather, in particular to the technical field of polyurethane resin materials for synthetic leather. Background technique [0002] Natural leather is widely used in the production of daily necessities and industrial products due to its excellent natural characteristics. However, with the rapid growth of the world population and the sharp increase in people's consumption levels, the market demand for leather has doubled, and the limited amount of natural leather has long been unable to meet people's daily consumption needs. At the same time, the production of natural leather is accompanied by a large amount of waste water, which causes serious pollution to the environment. In order to solve this contradiction, researchers began to research and develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08G18/64C08G18/12C08G18/36D06N3/14
CPCC08G18/7671C08G18/7621C08G18/7607C08G18/6696C08G18/36C08G18/4808C08G18/4825C08G18/4833C08G18/12C08G18/6469C08G18/4854D06N3/14C08G18/3206C08G18/64
Inventor 彭峰张初银杨信实俞杰彭超豪林上河
Owner ZHEJIANG HUAFON SYNTHETIC RESIN
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