Solvent-free, non-yellowing, high-transparency and high-brightness polyurethane resin for leather as well as preparation method and application

A polyurethane leather and solvent-free technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor physical properties and poor brightness of synthetic leather, and achieve high folding resistance at room temperature and low temperature, and high transparency Bright appearance, translucent surface effect

Inactive Publication Date: 2018-05-11
ZHEJIANG HUAFON SYNTHETIC RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a solvent-free, non-yellowing, high-transparency polyurethane resin and its preparation method and application, so as to overcome the problem of poor brightness and poor physical properties of non-yellowing, solvent-free synthetic leather

Method used

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  • Solvent-free, non-yellowing, high-transparency and high-brightness polyurethane resin for leather as well as preparation method and application
  • Solvent-free, non-yellowing, high-transparency and high-brightness polyurethane resin for leather as well as preparation method and application
  • Solvent-free, non-yellowing, high-transparency and high-brightness polyurethane resin for leather as well as preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 30.00kg of polyetherester polyol-isophordione diisocyanate prepolymer (number average molecular weight is 10000, functionality is 2), 64.35kg polyethylene glycol adipate (number average molecular weight is 1000) , 0.65kg of polydiethylene glycol glycerol adipate (functionality of 2.80, number-average molecular weight of 2000), heated to 120 ° C, dehydrated under vacuum conditions of -0.01MPa for 6h, and then cooled to 30°C, add 2.10kg ethylene glycol, 0.90kg trimethylolpropane, 0.70kg silicone foam stabilizer, 0.50kg siloxane defoamer, 0.15kg ultraviolet absorber UV-320, 0.30 Kg 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 125.4mgKOH / g and the moisture content was lower than 500ppm, the Resin A component is obtained, which is sealed and packaged for use.

[0056] In the reactor, drop into the isophor...

Embodiment 2

[0059] 45.00kg of polyetherester polyol-isophordione polyisocyanate prepolymer (number-average molecular weight is 10,000, functionality is 4), 30.00kg of poly(diethylene glycol butylene adipate) (number-average molecular weight is 4) Average molecular weight is 5000), 20.00kg of polydiethylene glycol glycerol adipate (functionality 2.05, number average molecular weight is 5000), heated to 140°C, dehydrated for 5h under vacuum conditions of -0.06MPa, After cooling to 50℃, add 2.47kg 1,4-butanediol, 0.13kg trimethylolpropane, 0.30kg silicone foam stabilizer, 0.30kg siloxane defoamer, 0.45kg ultraviolet absorber Agent 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 55.5mgKOH / g, the moisture content was low. At 500ppm, the resin A component is prepared, which is sealed and packaged for use.

[0060...

Embodiment 3

[0063] 38.00kg of polyetherester polyol-isophordione polyisocyanate prepolymer (number-average molecular weight is 30,000, functionality is 3), 40.00kg of polyethylene adipate diol (number-average molecular weight is 3) Molecular weight is 3000), 10.00kg of polydiethylene adipate trimethylol propane diol (functionality is 2.3, number-average molecular weight is 3000) is heated to 130 ° C, under the vacuum condition of -0.04MPa Dehydrated for 5 hours, then cooled to 40°C, added 4.50kg of ethylene glycol, 0.50kg of trimethylolpropane, 2.00kg of silicone foam stabilizer, 2.00kg of siloxane defoamer, and 0.68kg of ultraviolet absorber Agent UV-320, 0.64kg of light stabilizer 292, 0.32kg of antioxidant 245 and 1.00kg of organotin metal catalyst were mixed and stirred for 3 hours, and the hydroxyl value and moisture content were detected. When the hydroxyl value reached 109.1 mgKOH / g, the moisture content was low. At 500ppm, the resin A component is prepared, which is sealed and pac...

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Abstract

The invention discloses solvent-free, non-yellowing, high-transparency and high-brightness polyurethane resin for leather as well as a preparation method and application. The solvent-free, non-yellowing, high-transparency and high-brightness polyurethane resin is prepared from a resin component A and a resin component B, wherein the mass ratio of the resin component A to the resin component B ranges from (7 to 3) to (1 to 3). The resin component A contains a polyether ester polyol-aliphatic polyisocyanate pre-polymer with the mass percent of 30 percent to 45 percent and the resin component B contains aliphatic diisocyanate with the mass percent of 20 percent to 60 percent. A surface layer of synthetic leather is coated with the solvent-free, non-yellowing, high-transparency and high-brightness polyurethane resin for the leather, disclosed by the invention, and the synthetic leather has a non-yellowing, high-transparency and high-brightness aesthetic extent; in a production process, a curing speed is rapid and the rate of finished products is high; the anti-yellowing grade is greater than or equal to grade 4; the room-temperature folding resistance and the low-temperature folding resistance are high and the surface is transparent and bright.

Description

technical field [0001] The invention relates to a solvent-free polyurethane leather resin, its preparation method and application Background technique [0002] Solvent-free polyurethane resin generally contains two or more components. In the production process of synthetic leather, two or more resin components are directly subjected to chain extension, foaming and gelation reactions 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 quickly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/10C08G18/40C08G18/42C08G18/48C08G18/32C09D175/04
CPCC08G18/10C08G18/4018C08G18/4238C08G18/4825C08G18/4829C08G18/4837C08G18/4854C08G18/6611C09D175/04C08G18/3206
Inventor 于吉鹏张初银付志朋马元明张兵朱加秋
Owner ZHEJIANG HUAFON SYNTHETIC RESIN
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