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Polyurethane resin for high temperature resistant integrated solvent-free leather as well as preparation method and application of the polyurethane resin

A polyurethane resin and solvent-free technology, which is applied in textiles and papermaking, can solve the problems of limited influence on the physical properties of synthetic leather products, and achieve the effects of improving production operability, excellent high temperature resistance, and high production efficiency

Inactive Publication Date: 2018-06-15
ZHEJIANG HUAFON SYNTHETIC RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent application, aliphatic isocyanate is added to component A, and the isocyanate in component A reacts preferentially with small molecule diols and small molecule triols according to its ratio to form hydroxyl-terminated small molecule prepolymers, which solves the problem of low Compatibility between polymer polyols and small molecule polyols, but the impact on the physical properties of synthetic leather products is very limited, and it is necessary to improve the physical properties of aliphatic solvent-free leather by adding carbon fiber materials

Method used

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  • Polyurethane resin for high temperature resistant integrated solvent-free leather as well as preparation method and application of the polyurethane resin
  • Polyurethane resin for high temperature resistant integrated solvent-free leather as well as preparation method and application of the polyurethane resin
  • Polyurethane resin for high temperature resistant integrated solvent-free leather as well as preparation method and application of the polyurethane resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 20.00kg of polyether ester-toluene diisocyanate prepolymer (number average molecular weight is 10000, functionality is 2), 73.35kg of polyethylene glycol propylene glycol phthalate (number average molecular weight is 1000), 1.65kg of Diethylene glycol glycerol phthalate (functionality: 2.80, number average molecular weight: 280), heated to 120°C, dehydrated for 6h under vacuum condition of -0.01MPa, then cooled to 30°C, Add 2.10kg of ethylene glycol, 0.90kg of trimethylolpropane, 0.70kg of silicone foam stabilizer, 0.3kg of deionized water, 0.65kg of ultraviolet absorber UV-320, 0.30kg of light stabilizer 292, 0.05kg of antioxidant 245 and 0.30kg of organotin metal catalyst were mixed and stirred for 2 hours, and the hydroxyl value and moisture content were detected. When the hydroxyl value reached 161.8mgKOH / g and the moisture content was 0.3%, the resin component A was prepared and packaged in a sealed stand-by.

[0053] Put 33.10kg of toluene diisocyanate into the r...

Embodiment 2

[0056] The polyether ester-isophordione polyisocyanate prepolymer (number average molecular weight is 10000, functionality is 4) of 35.00kg, the polybutylene glycol isophthalate of 58.00kg (number average Molecular weight is 2000), 2.00kg polydiethylene glycol glycerol isophthalate (functionality 2.05, number average molecular weight is 1000), warming up to 140 ℃, dehydration 5h under the vacuum condition of -0.06MPa, After cooling down to 50°C, add 2.47kg of 1,4-butanediol, 0.13kg of trimethylolpropane, 0.30kg of silicone foam stabilizer, 0.30kg of deionized water, and 0.45kg of ultraviolet absorber UV-320 , the light stabilizer 292 of 0.36kg, the antioxidant 245 of 0.09kg and the organic tin metal catalyst of 0.90kg were mixed and stirred for 2h, and the hydroxyl value and moisture content were detected, until the hydroxyl value reached 93.8mgKOH / g, and when the moisture content was 0.3%, that is The resin component A is obtained, sealed and packaged for use.

[0057] Put 8...

Embodiment 3

[0060] The polyether ester-diphenylmethane diisocyanate prepolymer (number average molecular weight is 30000, functionality is 3) of 33.40kg, the polyethylene terephthalate of 40.00kg (number average molecular weight is 3000 ), 15.00kg of polydiethylene glycol trimethylolpropane isophthalate (functionality is 2.3, number average molecular weight is 3000) is heated up to 130°C, dehydrated under -0.04MPa vacuum condition for 5h, and then Cool down to 40°C, add 4.50kg of ethylene glycol, 0.50kg of trimethylolpropane, 2.00kg of silicone foam stabilizer, 2.00kg of deionized water, 0.64kg of ultraviolet absorber UV-320, 0.64kg of Light stabilizer 292, 0.32kg of antioxidant 245 and 1.00kg of organic tin metal catalyst were mixed and stirred for 3 hours, and the hydroxyl value and moisture content were detected. When the hydroxyl value reached 235.7mgKOH / g and the moisture content was 2.0%, resin A was obtained Components, sealed and packaged for use.

[0061] Put 28.98kg of methane ...

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Abstract

The invention discloses a polyurethane resin for high temperature resistant integrated solvent-free leather as well as a preparation method and application of the polyurethane resin. The polyurethaneresin for high temperature resistant integrated solvent-free leather comprises a resin A component and a resin B component, wherein the resin A component comprises 20%-40% by weight percentage of a polyether ester polyol-aromatic polyisocyanate prepolymer and 0.3%-2.0% by weight percentage of water; and the resin B component comprises 15%-85% by weight percentage of aromatic diisocyanate. Only knife coating of one knife of the solvent-free resin is needed when the polyurethane resin for high temperature resistant integrated solvent-free leather is used for producing synthetic leather, and thenthe produced synthetic leather can have a surface layer, bonding layer and foaming layer structure, the process is simple, and the high temperature resistance is excellent.

Description

technical field [0001] The invention relates to a solvent-free polyurethane leather resin and its preparation method and application Background technique [0002] Solvent-free polyurethane resin generally contains two or more components. During the production of synthetic leather, two or more resin components undergo chain extension, foaming and gel reactions directly on the substrate. [0003] The production process of solvent-free polyurethane synthetic leather is: [0004] (1) Scrape coating and drying the surface layer: two or more surface layer resin components are transported to the mixing head in a certain proportion, mixed evenly, and immediately injected on the release paper, and coated by scraping to form a film After entering the drying tunnel, the polyurethane resin components react quickly, the molecular weight of the polymer increases sharply, and the polyurethane synthetic leather surface layer with a characteristic group structure is quickly generated; [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/32C08G18/42C08G18/10D06N3/14
CPCC08G18/4244C08G18/10C08G18/664C08G18/6644D06N3/146D06N2203/068D06N2209/06C08G18/425C08G18/4211C08G18/3206
Inventor 张初银于吉鹏付志朋马元明张兵林上河
Owner ZHEJIANG HUAFON SYNTHETIC RESIN
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