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Blocked high-temperature resistant integrated solvent-free polyurethane resin for leather, and preparation method and application thereof

A solvent-free polyurethane and high-temperature-resistant technology, which is applied in polyurea/polyurethane coatings, textiles, papermaking, and coatings, can solve the problems that are unfavorable for the transformation and development of synthetic leather manufacturers, and achieve improved production operability, simple and convenient processes, and The effect of saving production cost

Inactive Publication Date: 2018-09-25
ZHEJIANG HUAFON SYNTHETIC RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the production process of solvent-free polyurethane synthetic leather is completely different from the production process of solvent-based polyurethane synthetic leather and water-based polyurethane synthetic leather. Special production equipment for solvent-free synthetic leather is required, which is not conducive to the transformation and development of synthetic leather manufacturers.

Method used

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  • Blocked high-temperature resistant integrated solvent-free polyurethane resin for leather, and preparation method and application thereof
  • Blocked high-temperature resistant integrated solvent-free polyurethane resin for leather, and preparation method and application thereof
  • Blocked high-temperature resistant integrated solvent-free polyurethane resin for leather, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1 (sealing agent is 3-hydroxyquinoline)

[0046] 20.00kg of polyether ester polyol-toluene diisocyanate prepolymer (number average molecular weight is 10000, functionality is 2), 73.35kg of polyethylene glycol propylene glycol phthalate diol (number average molecular weight is 1000) , 1.65kg of poly(ethylene glycol) glycerol phthalate polyol (functionality is 2.80, number average molecular weight is 280), heated to 120 ℃, dehydration under -0.01MPa vacuum condition for 6h, after Cool down to 30°C, add 2.10kg of ethylene glycol, 0.90kg of trimethylolpropane, 0.70kg of silicone foam stabilizer, 0.30kg 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%, resin A was prepared Components, s...

Embodiment 2

[0049] Embodiment 2 (sealing agent is sodium bisulfite)

[0050] 35.00kg of polyether ester polyol-isophordione polyisocyanate prepolymer (number average molecular weight is 10000, functionality is 4), 58.00kg of polybutylene glycol isophthalate ( The number average molecular weight is 2000), 2.00kg of polydiethylene glycol glycerol isophthalate (functionality 2.05, number average molecular weight is 1000), heated to 140 ° C, dehydrated under vacuum conditions of -0.06MPa After 5 hours, 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 deionized water, and 0.45kg of ultraviolet 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 93.8mgKOH / g and the moisture content was 0.3%. , sealed and packaged to obtain resin c...

Embodiment 3

[0053] Embodiment 3 (sealing agent is hexanethiol)

[0054] 33.40kg of polyether ester polyol-diphenylmethane diisocyanate prepolymer (number average molecular weight is 30000, functionality is 3), 40.00kg of polyethylene terephthalate diol (number Average molecular weight is 3000), 15.00kg polydiethylene glycol trimethylolpropane isophthalate polyol (functionality is 2.3, number average molecular weight is 3000) is heated up to 130 ℃, the vacuum of-0.04MPa Dehydrate under the conditions for 5 hours, then lower the temperature to 40°C, add 4.50kg of ethylene glycol, 0.50kg of trimethylolpropane, 2.00kg of silicone foam stabilizer, 2.00kg of deionized water, and 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%. Seal t...

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Abstract

Blocked high-temperature resistant integrated solvent-free polyurethane resin for leather, and a preparation method and application thereof are disclosed. The polyurethane resin comprises a resin component A and a resin component B. The resin component A comprises a polyether ester polyol-polyisocyanate prepolymer, polyester polyol, a small molecule alcohol chain extender, a foaming agent and a catalyst. The resin component B comprises diisocyanate, polyester polyol and a NCO blocking agent. The blocking agent is one or more selected from phenol, nitrophenol, 2-pyridinol, 3-hydroxyquinoline, triphenylmethanethiol, hexanethiol, dodecanethiol, 3,5-dimethylpyrazole, 1,2,4-triazole, 2-methyl imidazoline, 2-ethyl-4-methylimidazole, caprolactam, N-methylacetamide, phenylacetamide, bisulfate or amine. The polyurethane resin can be used for preparing high-temperature resistance solvent-free polyurethane synthetic leather. The production efficiency is high. Equipment specially used for solvent-free leather synthesis is not needed, operable time is long after product mixing and stability is high.

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 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 a pouring process, that is, the polyol component and prepolymer component in the resin for solvent-free polyurethane synthetic leather are stored in the A and B material tanks during pouring respectively. The polyol components and prepolymer components stored in tanks A and B are mixed at high speed in the pouring head according to a specific ratio, and then injected and scraped on the substrate, and then enter the drying tunnel for reaction molding. It can be seen that the production process of solvent-free po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/42C08G18/48C08G18/75C08G18/32C08G18/76C08G18/83C09D175/06C09D175/08C09D7/63D06N3/14D06N3/00
CPCC08G18/3206C08G18/4018C08G18/42C08G18/4238C08G18/4241C08G18/425C08G18/48C08G18/4812C08G18/755C08G18/7614C08G18/83C08G18/833C08G18/834C09D175/06C09D175/08C09D7/63C08G2110/0083D06N3/0097D06N3/148D06N2209/067D06N2211/28C08K5/1345
Inventor 于吉鹏张初银付志朋马元明张兵林上河
Owner ZHEJIANG HUAFON SYNTHETIC RESIN
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