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Polyurethane resin for solvent-free high-transparency tortuosity-resistant leather and its preparation method and application

A solvent-free, tortuous-resistant technology, applied in polyurea/polyurethane coatings, textiles, papermaking, coatings, etc., can solve the problems of insufficient aesthetics, difficulty in making high-transparency and tortuous-resistant surface leather, and improve production Operability, high transparency and high brightness aesthetics, and the effect of improving peel strength

Active Publication Date: 2020-09-29
ZHEJIANG HUAFON SYNTHETIC RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The current polyurethane surface layer grease for solvent-free leather is difficult to produce a high-transparency and tortuous-resistant surface leather, and the aesthetics are insufficient.

Method used

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  • Polyurethane resin for solvent-free high-transparency tortuosity-resistant leather and its preparation method and application
  • Polyurethane resin for solvent-free high-transparency tortuosity-resistant leather and its preparation method and application
  • Polyurethane resin for solvent-free high-transparency tortuosity-resistant leather and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 30.00kg of polyether ester polyol-toluene diisocyanate prepolymer (number-average molecular weight is 10000, functionality is 2), 26.00kg of polyoxypropylene glycol (number-average molecular weight is 5000), 19.50kg of polyoxypropylene glycol Propylene trihydric alcohol (number average molecular weight is 9000), 19.50kg polyoxypropylene tetraol (number average molecular weight is 10000) is heated up to 120°C, dehydrated under -0.01MPa vacuum condition for 6h, then cooled to 30°C, adding 2.10kg of ethylene glycol, 0.90kg of trimethylolpropane, 0.70kg of silicone foam stabilizer, 0.50kg of silicone defoamer, 0.15kg of ultraviolet absorber UV-320, 0.30kg of light stabilizer Agent 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 64.8mgKOH / g and the moisture content was lower than 500ppm, the resin group A was prepared Divided, s...

Embodiment 2

[0056] 45.00kg of polyether ester polyol-diphenylmethane diisocyanate prepolymer (number average molecular weight is 10000, functionality is 4), 35.00kg polytetrahydrofuran ether glycol (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 organotin metal catalyst were mixed and stirred for 2 hours, and the hydroxyl value and moisture content were detected. When the hydroxyl value reached 60.3mgKOH / g, the moisture content When it is lower than 500ppm, the resin comp...

Embodiment 3

[0060] 38.00kg of polyether ester polyol-toluene diisocyanate prepolymer (number average molecular weight is 30000, functionality is 3), 25.00kg of polyoxypropylene glycol (number average molecular weight is 20000), 25.00kg of polyoxypropylene glycol Propylene trihydric alcohol (number-average molecular weight: 18000) was heated up to 130°C, dehydrated for 5h under vacuum condition of -0.04MPa, then cooled to 40°C, added 4.50kg of ethylene glycol, 0.50kg of trimethylolpropane, 2.00kg Organosilicon foam stabilizer, 2.00kg siloxane defoamer, 0.64kg UV absorber UV-320, 1.64kg light stabilizer 292, 0.32kg antioxidant 245 and 0.40kg organotin metal catalyst Mix and stir for 3 hours, detect the hydroxyl value and moisture content, when the hydroxyl value reaches 93.6mgKOH / g, and the moisture content is lower than 500ppm, the resin component A is prepared, and sealed and packaged for use;

[0061] In the reactor, drop into the toluene diisocyanate of 24.94kg, the polyethylene adipate...

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Abstract

The invention discloses a polyurethane resin used for non-solvent leather with high brightness and bending resistance, a preparation method and application. The polyurethane resin used for non-solventleather with high brightness and bending resistance comprises a resin component A and a resin component B; the resin component A comprises 30% to 45% of ether-ester polyhydric alcohol-aromatic polyisocyanates prepolymer; the resin component B comprises 15% to 60% of aromatic diisocyanate. The resin can be used for preparing polyurethane synthetic leather, the synthetic leather is high in brightness and attractive in appearance, the physical and mechanical properties, such as bending resistance, of the synthetic leather are improved preferably, the production operability of the non-solvent synthetic leather in the mass production process is improved, and the matching stability of the resin component A and the resin component B during machining is guaranteed.

Description

technical field [0001] The invention relates to a solvent-free polyurethane resin for leather, its preparation method and application Background technique [0002] Solvent-free polyurethane resins for leather 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 gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/14C09D175/08C08G18/32C08G18/42C08G18/48C08G18/66C08G18/76
CPCC08G18/3206C08G18/4018C08G18/42C08G18/4238C08G18/4816C08G18/4825C08G18/4829C08G18/4854C08G18/6611C08G18/7614C08G18/7671C08L2205/025C09D175/08D06N3/146C08L75/08
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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