Preparation method for environment-friendly TPU

An environmentally friendly and prepolymer technology, which is applied in the field of preparation of environmentally friendly TPU, can solve the problems of unusable polyurethane and achieve the effects of improving environmental safety, good processing performance, and increasing the scope of use

Inactive Publication Date: 2018-12-14
界首永恩机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polyurethane elastomers are used in a wide range of applications. Polyurethane is a flammable material. When it is used in electrical or automotive parts, it cannot be used due to the frequent high temperature.

Method used

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  • Preparation method for environment-friendly TPU
  • Preparation method for environment-friendly TPU

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of preparation method of environment-friendly TPU, is made of component A and component B,

[0037] Component A is polyurethane prepolymer, which is made of the following raw materials:

[0038] 55 parts of hexamethylene diisocyanate, 8 parts of polyether polyol, 50 parts of polyester polyol, 12 parts of composite additive, 0.09 part of catalyst;

[0039] Component B is a chain extender, and the chain extender is 1,4 butanediol;

[0040] The weight ratio of the component A to the component B is 3.4:1;

[0041] The composite additive is made of the following raw materials by weight: 26 parts of attapulgite, 4.5 parts of expanded graphite, 9 parts of magnesium hydroxide, and 11 parts of glass fiber.

[0042] The attapulgite in the composite additive is processed by the following methods:

[0043] (1) Add attapulgite to 3-5 times its weight in a nitric acid solution with a mass fraction of 5% and soak for 10-15 minutes, then wash it with deionized water for 3-4 t...

Embodiment 2

[0056] A kind of preparation method of environment-friendly TPU, is made of component A and component B,

[0057] Component A is polyurethane prepolymer, which is made of the following raw materials:

[0058] 60 parts of hexamethylene diisocyanate, 7 parts of polyether polyol, 53 parts of polyester polyol, 10 parts of composite additive, 0.1 part of catalyst;

[0059] Component B is a chain extender, and the chain extender is 1,2 propylene glycol;

[0060] The weight ratio of the component A to the component B is 3.31;

[0061] The composite additive is made of the following raw materials by weight: 27 parts of attapulgite, 4.2 parts of expanded graphite, 9 parts of magnesium hydroxide, and 11 parts of glass fiber.

[0062] The processing method of other raw materials is as embodiment 1.

Embodiment 3

[0064] A kind of preparation method of environment-friendly TPU, is made of component A and component B,

[0065] Component A is polyurethane prepolymer, which is made of the following raw materials:

[0066] 50 parts of hexamethylene diisocyanate, 10 parts of polyether polyol, 56 parts of polyester polyol, 11 parts of composite additives, 0.12 parts of catalyst;

[0067] Component B is a chain extender, and the chain extender is 1,4 butanediol;

[0068] The weight ratio of said component A to component B is 3.2:1;

[0069] The composite additive is made of the following raw materials by weight: 27 parts of attapulgite, 4.6 parts of expanded graphite, 9 parts of magnesium hydroxide, and 11 parts of glass fiber.

[0070] Other processing modes are as embodiment 1.

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Abstract

The invention relates to a preparation method for an environmentally-friendly TPU. The preparation method comprises the following steps: mixing polyether polyol with polyester polyol, carrying out pressure-reduced distillation to remove moisture therein, then adding hexamethyldiisocyanate, and carrying out a reaction at 37 DEG C under nitrogen protection for 40-45 min to obtain a prepolymer A; adding a catalyst into the prepolymer A, carrying out a reaction at 45-48 DEG C for 20-15 min, then adding a composite additive, carrying out stirring treatment for 40-50 min so as to obtain a prepolymerB; and adding a chain extender into the prepolymer B, carrying out a reaction at 70-72 DEG C for 55-70 min to obtain a polyurethane elastomer. The TPU of the invention has good processing properties,and is not significantly reduced in performance during molding process, free of toxicity to environment and human beings and improved in environmental safety.

Description

technical field [0001] The invention belongs to the field of environmentally friendly new materials, and in particular relates to a preparation method of environmentally friendly TPU. Background technique [0002] Polyurethane elastomer is a variety of polyurethane synthetic materials. Because its structure has two segments, soft and hard, it can be molecularly designed to endow the material with excellent properties such as high strength, good toughness, wear resistance, and oil resistance. It has both The high elasticity of rubber has the rigidity of plastic, so it is called "wear-resistant rubber". [0003] Polyurethane elastomers can be molded, mixed, and vulcanized like general-purpose rubber (referred to as MPU); they can also be made into liquid rubber, poured and molded or sprayed, potted, and centrifugally formed (referred to as CPU); Pellets, like ordinary plastics, are formed by injection, extrusion, calendering, blow molding and other processes (referring to CPU...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32C08G18/12C08K13/06C08K9/02C08K9/04C08K9/06C08K3/34C08K7/24C08K7/14C08K7/10C08K3/04
Inventor 张海涛
Owner 界首永恩机电科技有限公司
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