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Polyurethane resin for solvent-free leather and preparing method and application thereof

A polyurethane resin and solvent-free technology, which is applied in the field of solvent-free leather polyurethane resin and its preparation and application, can solve the problems of limited influence on the physical properties of synthetic leather products, and achieve improved production operability, high production efficiency, and excellent physical and mechanical properties Effect

Inactive Publication Date: 2018-05-18
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 solvent-free leather and preparing method and application thereof
  • Polyurethane resin for solvent-free leather and preparing method and application thereof
  • Polyurethane resin for solvent-free leather and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 20.00kg of polyetherester polyol-toluene diisocyanate prepolymer (number-average molecular weight is 10,000, functionality is 2), 73.35kg of polyethylene propylene adipate (number-average molecular weight is 1000), 1.65kg The polydiethylene glycol glycerol adipate (functionality of 2.80, number-average molecular weight of 2000) was heated to 120 ° C, dehydrated under vacuum conditions of -0.01 MPa for 6 h, and then cooled to 30 ° C, Add 2.10kg ethylene glycol, 0.90kg trimethylolpropane, 0.70kg organosilicon foam stabilizer, 0.3kg deionized water, 0.65kg ultraviolet absorber UV-320, 0.30kg 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 153.8mgKOH / g and the moisture content was 0.3%, the resin A component was obtained and sealed. stand-by.

[0058] Drop into the reaction kettle the toluene diisocyanate of 3...

Embodiment 2

[0061] 35.00kg of polyetherester polyol-isophordione polyisocyanate prepolymer (number-average molecular weight is 10,000, functionality is 4), 58.00kg of poly(diethylene glycol butylene adipate) (number-average molecular weight is 4) The average molecular weight is 5000), 2.00kg of polydiethylene glycol glycerol adipate (functionality 2.05, number average molecular weight is 5000), heated to 140°C, dehydrated under vacuum conditions of -0.06MPa for 5h, After cooling to 50 ℃, add 2.47kg 1,4-butanediol, 0.13kg trimethylolpropane, 0.30kg organosilicon foam stabilizer, 0.30kg deionized water, 0.45kg ultraviolet absorber UV- 320, 0.36kg of light stabilizer 292, 0.09kg of antioxidant 245 and 0.90kg 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 125.4 mgKOH / g and the moisture content was 16%, That is, the resin A component is prepared, which is sealed and packaged for use.

...

Embodiment 3

[0065] 33.40kg of polyetherester polyol-diphenylmethane diisocyanate prepolymer (number-average molecular weight is 30,000, functionality is 3), 40.00kg of polyethylene adipate (number-average molecular weight is 3) 3000), 15.00kg of poly(diethylene glycol trimethylolpropane adipate) (functionality of 2.3, number-average molecular weight of 3000) was heated to 130°C, dehydrated under vacuum conditions of -0.04MPa for 5h, and then Cool to 40 ℃, add 4.50kg ethylene glycol, 0.50kg trimethylolpropane, 2.00kg silicone foam stabilizer, 2.00kg deionized water, 0.64kg ultraviolet absorber UV-320, 0.64kg Light stabilizer 292, 0.32kg antioxidant 245 and 1.00kg organotin metal catalyst were mixed and stirred for 3 hours, and the hydroxyl value and moisture content were detected. When the hydroxyl value reached 235.7 mgKOH / g and the moisture content was 2.0%, resin A was obtained. components, sealed and packaged for use.

[0066] Drop into the reaction kettle the methane diisocyanate of ...

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Abstract

The invention discloses polyurethane resin of solvent-free synthetic leather and a preparing method and application thereof. The polyurethane resin of the solvent-free synthetic leather comprises a resin component A and a resin component B, wherein the resin component A is prepared from, by weight, 20-45% of polyether ester polyol-polyisocyanates prepolymer and 0.3-2.0% of water, the resin component B is prepared from, by weight, 20-60% of diisocyanate, and the mass ratio of the resin component A to the resin component B is 3:1-1:3. When the polyurethane resin of the solvent-free synthetic leather is used for producing the synergic leather, what is only needed is to scrape solvent-free resin so that a surface layer structure, an adhesive layer structure and a foaming layer structure can beprovided, the technology process is simple, and the physical and mechanical performance is excellent.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/40C08G18/42C08G18/10C08G18/32C08J9/08D06N3/00D06N3/14
CPCC08G18/10C08G18/4018C08G18/4238C08G18/425C08G18/6611C08G2110/0083D06N3/0097D06N3/146D06N2211/28C08G18/3206
Inventor 张初银于吉鹏付志朋马元明张兵彭峰
Owner ZHEJIANG HUAFON SYNTHETIC RESIN
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