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Solvent-free, non-yellowing, high-brightness, tortuous-resistant polyurethane leather resin and its preparation method and application

A polyurethane leather, solvent-free technology, applied in the direction of textiles and papermaking, etc., can solve the problems of difficult to produce high-transparency and twist-resistant surface leather, insufficient aesthetics, etc., to improve production operability, improve twist resistance, and guarantee The effect of stability

Active Publication Date: 2020-11-24
ZHEJIANG HUAFON SYNTHETIC RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The current non-yellowing polyurethane surface layer resin for solvent-free leather is difficult to produce a high-transparency, twist-resistant surface layer leather, and the aesthetics are insufficient.

Method used

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  • Solvent-free, non-yellowing, high-brightness, tortuous-resistant polyurethane leather resin and its preparation method and application
  • Solvent-free, non-yellowing, high-brightness, tortuous-resistant polyurethane leather resin and its preparation method and application
  • Solvent-free, non-yellowing, high-brightness, tortuous-resistant polyurethane leather resin and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 30.00kg of polyether ester polyol-isophorone cyanate prepolymer (number average molecular weight is 10000, functionality is 2), 26.00kg of polyoxypropylene glycol (number average molecular weight is 5000), 19.50 kg of polyoxypropylene trihydric alcohol (number average molecular weight is 9000), 19.50 kg of polyoxypropylene tetrahydric alcohol (number average molecular weight is 10000) is heated up to 120 ° C, dehydrated under -0.01MPa vacuum condition for 6 hours, and then cooled to 30°C, add 2.10kg of ethylene glycol, 0.90kg of trimethylolpropane, 0.70kg of silicone foam stabilizer, 0.50kg of siloxane defoamer, 0.15kg of ultraviolet absorber UV-320, 0.30 kg of light stabilizer 292, 0.05 kg of antioxidant 245, and 0.30 kg of organic tin metal catalyst were mixed and stirred for 2 hours, and the hydroxyl value and moisture content were detected. When the hydroxyl value reached 66.5 mgKOH / g and the moisture content was lower than 500 ppm, it was prepared Obtain resin comp...

Embodiment 2

[0057] 45.00kg of polyether ester polyol-dicyclohexylmethane diisocyanate prepolymer (number average molecular weight is 10000, functionality is 4), 35.00kg polytetrahydrofuran ether diol (number average molecular weight is 10000), 10.00kg Polyoxypropylene-oxyethylene trihydric alcohol (number average molecular weight is 12000), 5.00kg polyoxypropylene tetrahydric alcohol (number average molecular weight is 20000) is heated up to 140 ℃, dehydration 5h under the vacuum condition of -0.06MPa, after Cool down to 50°C, add 2.47kg of 1,4-butanediol, 0.13kg of trimethylolpropane, 0.30kg of silicone foam stabilizer, 0.30kg of silicone defoamer, 0.45kg of ultraviolet light Absorber UV-320, 0.36kg of light stabilizer 292, 0.09kg of antioxidant 245 and 0.90kg of organic tin metal catalyst were mixed and stirred for 2 hours, and the hydroxyl value and moisture content were detected. When the hydroxyl value reached 43.4mgKOH / g, the moisture content When it is lower than 500ppm, the resin ...

Embodiment 3

[0061] 38.00kg of polyether ester polyol-dicyclohexylmethane diisocyanate prepolymer (number average molecular weight is 30000, functionality is 3), 25.36kg of polyoxypropylene glycol (number average molecular weight is 20000), 25.00kg The polyoxypropylene trihydric alcohol (the number average molecular weight is 18000) is heated up to 130°C, dehydrated for 5 hours under the vacuum condition of -0.04MPa, and then cooled to 40°C, adding 4.50kg of ethylene glycol and 0.50kg of trimethylolpropane , 2.00kg of silicone foam stabilizer, 2.00kg of silicone defoamer, 0.64kg of ultraviolet absorber UV-320, 0.68kg of light stabilizer 292, 0.32kg of antioxidant 245 and 1.00kg of organic The tin metal catalyst was mixed and stirred for 3 hours, and the hydroxyl value and moisture content were detected. When the hydroxyl value reached 93.6mgKOH / g and the moisture content was lower than 500ppm, the resin component A was prepared and sealed and packaged for use;

[0062] In the reactor, drop...

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Abstract

The invention discloses a solvent-free, non-yellowing, high-transparency, highlight and bending-resistance polyurethane leather resin, and a preparation method and an application thereof. The solvent-free, non-yellowing, high-transparency, highlight and bending-resistance polyurethane leather resin comprises a resin A component and a resin B component; the ratio of the resin A component to the resin B component is 3:1 to 1:2 in mass, and the resin A component contains 30 wt%-45 wt% of a polyether polyol-aliphatic polyisocyanate prepolymer, and the resin B component contains 15 wt%-60 wt% of aliphatic diisocyanate. A synthetic leather surface layer is coated with the solvent-free, non-yellowing, high-transparency, highlight and bending-resistance polyurethane leather resin, synthetic leather is endowed with high-transparency and highlight aesthetic degree, and the bending resistance and other physical and mechanical properties of the non-yellowing synthetic leather are further improved;the bending strength at normal temperature is more than or equal to 200 thousand times, the bending resistance at the temperature of -20 DEG C is more than or equal to 50 thousand times, the synthetic leather is resistant to hydrolysis for 8 weeks, and the yellowing resistance level is more than or equal to 4.

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 resins generally contain 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; [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/40C08G18/42C08G18/48C08G18/10C08G18/32D06N3/14
CPCC08G18/10C08G18/4018C08G18/4238C08G18/4816C08G18/4825C08G18/4829C08G18/4837C08G18/4854C08G18/6611D06N3/146D06N3/147D06N2209/0853D06N2211/28C08G18/3206
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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