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A kind of polyurethane resin and its preparation method and application

A technology of polyurethane resin and polyester polyol, applied in the field of polyurethane resin, can solve the problem that TPR sole injection cannot be realized, and achieve the effects of promoting compatibility, improving bonding fastness and easy softening.

Active Publication Date: 2022-05-27
ZHEJIANG HUAFON SYNTHETIC RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shoe leather produced by this invention has excellent air permeability and moisture permeability, good scratch resistance and wear resistance, smooth surface, and good hand feeling; but the polyurethane resin provided by the above two patents cannot be injection molded with TPR soles

Method used

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  • A kind of polyurethane resin and its preparation method and application
  • A kind of polyurethane resin and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A kind of polyurethane resin, its preparation method comprises the steps:

[0058] (1) At 55°C, poly(2-methyl-1,3-propylene adipate diol with a number average molecular weight of 1,000), polybutadiene glycol with a number average molecular weight of 1,000, and polybutadiene glycol with a number average molecular weight of 1,000 Polybutadiene acrylonitrile diol, 1,4-butanediol and phosphite antioxidants (BASF, Antioxidant 168) in a mass ratio of 2:1 N,N-dimethylformamide and toluene Mix evenly in 2-methyl-1,3-propylene adipate diol, the total molar amount of polybutadiene diol and polybutadiene acrylonitrile diol and 1,4- The molar ratio of butanediol is 1:2 and the molar ratio of poly-2-methyl-1,3-propylene adipate diol, polybutadiene diol and polybutadiene acrylonitrile diol is 7:3 :1;

[0059] (2) react the mixture obtained in step (1), 4,4'-dicyclohexylmethane diisocyanate and organic bismuth catalyst (leading in the United States, BICAT8108) at 105°C for 1.5h to o...

Embodiment 2

[0062] A kind of polyurethane resin, its preparation method comprises the steps:

[0063] (1) Polybutadiene diol with a number average molecular weight of 1000, polybutadiene diol with a number average molecular weight of 1000, and polybutadiene acrylonitrile with a number average molecular weight of 1000 at 50°C Diol, 1,4-butanediol and phosphite antioxidants (BASF, Antioxidant 168) were uniformly mixed in N,N-dimethylformamide and toluene in a mass ratio of 2:1 to obtain a mixture ; Wherein, the total molar ratio of polyneopentyl adipate diol, polybutadiene diol and polybutadiene acrylonitrile diol to 1,4-butanediol is 1:2, and the poly The molar ratio of neopentyl glycol adipate diol, polybutadiene diol and polybutadiene acrylonitrile diol is 5:3:2;

[0064] (2) reacting the mixture obtained in step (1), isophorone diisocyanate and organic bismuth catalyst (leading in the United States, BICAT8108) at 100° C. for 2 hours to obtain a prepolymer;

[0065] (3) adding isophoro...

Embodiment 3

[0067] A kind of polyurethane resin, its preparation method comprises the steps:

[0068] (1) Poly-3-methyl-1,5-pentanediol adipate diol with a number average molecular weight of 1000, polybutadiene diol with a number average molecular weight of 1000, and a number average molecular weight of 1000 of polybutadiene acrylonitrile diol, 1,4-butanediol and phosphite antioxidants (BASF, antioxidant 168) in a mass ratio of 2:1 N,N-dimethylformamide Mix well with toluene to obtain a mixture; wherein, the total molar amount of polyneopentyl adipate diol, polybutadiene diol and polybutadiene acrylonitrile diol and 1,4-butanediol The molar ratio is 1:2 and the molar ratio of poly-3-methyl-1,5-pentanediol adipate diol, polybutadiene diol and polybutadiene acrylonitrile diol is 4:1:1 ;

[0069] (2) react the mixture obtained in step (1), isophorone diisocyanate and organic bismuth catalyst (leading in the United States, BICAT8108) at 110° C. for 1 h to obtain a prepolymer;

[0070] (3) ...

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Abstract

The invention provides a polyurethane resin and its preparation method and application. The raw materials for the preparation of the polyurethane resin include polyester polyol, polybutadiene diol (HTPB), polybutadiene acrylonitrile diol (HTBN), expanded The combination of chain agent and aliphatic diisocyanate; by introducing low-polarity HTPB and HTBN into the raw materials for preparation, together with polyester polyol and aliphatic isocyanate, the overall polarity of the final polyurethane resin is greatly reduced, and it is promoted. The compatibility of TPR material makes it have high bonding fastness with TPR material without adding binder in the injection molding process, which has important research significance.

Description

technical field [0001] The invention belongs to the technical field of polyurethane resins, and in particular relates to a polyurethane resin and a preparation method and application thereof. Background technique [0002] Polyurethane resins are generally block compounds obtained by the reaction of polyols and isocyanates. Due to the existence of structures such as ester groups, ether groups, urea groups or allophanate in the structure, the cohesive energy of the molecule is relatively high and the polarity is strong. Therefore, polyurethane resin is a relatively high polarity material, which has the characteristics of light weight and good resilience. TPR (Thermo-Plastic-Rubber) material is a thermoplastic rubber material, which is a kind of thermoplastic soft rubber material with rubber elasticity without vulcanization, and can be directly processed and formed. TPR material is based on thermoplastic styrene-butadiene rubber. Fillers, plasticizers and other functional addi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/12C08G18/66C08G18/42C08G18/32C08G18/69A43B1/14
CPCC08G18/12C08G18/664C08G18/6651C08G18/4238C08G18/698A43B1/14C08G18/3206C08G18/3234
Inventor 方飞张初银韩飞龙杜飘扬吴震马元明彭峰俞杰
Owner ZHEJIANG HUAFON SYNTHETIC RESIN
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