Thermoplastic polyurethane elastomer with hydrolytic stability and preparation method thereof

A thermoplastic polyurethane and elastomer technology, which is applied in the field of thermoplastic polyurethane elastomer and its preparation, can solve the problems of complex production process, high price, and increased production cost, so as to improve product competitiveness, improve hydrolysis resistance, and low price Effect

Inactive Publication Date: 2009-06-17
烟台万华新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it improves the hydrolysis resistance of the material, the production cost of polyurethane elastomers is greatly increased due to the complicated preparation process and high price of such additives.
[0012] US3716502 discloses a method of adding a small amount of acid silica to improve the hydrolytic stability of polyurethane, but when this method is used for thermopla

Method used

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  • Thermoplastic polyurethane elastomer with hydrolytic stability and preparation method thereof
  • Thermoplastic polyurethane elastomer with hydrolytic stability and preparation method thereof
  • Thermoplastic polyurethane elastomer with hydrolytic stability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 Polyester type thermoplastic polyurethane elastomer

[0037] Add 0.785 kilograms of liquefied MDI to 7.065 kilograms of pure MDI and mix evenly, then with 68.25 kilograms of polyester diol (molecular weight 2000), 23.90 kilograms of chain extender (1,4-butanediol), an appropriate amount of Add stannous octoate to a twin-screw reaction extruder for reaction, directly granulate underwater, and obtain TPU granules after drying and aging.

Embodiment 2

[0038] Example 2 Polyether type thermoplastic polyurethane elastomer

[0039] Add 1.98 kilograms of liquefied MDI to 31.06 kilograms of pure MDI and mix well, then mix with 60.29 kilograms of polyether glycol (PTMEG, molecular weight 1000), 6.63 kilograms of chain extender (1,4-butanediol), Add appropriate amount of stannous octoate (T-9) into a twin-screw reaction extruder for reaction, directly granulate under water, and obtain TPU granules after drying and aging.

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PUM

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Abstract

The invention discloses a thermoplastic polyurethane elastomer which is hydrolysis resistant and the preparation thereof and particularly discloses a thermoplastic polyurethane elastomer which uses organic vulcabond comprising carbodiimide modification as a hydrolysis resisting accessory ingredient. The thermoplastic polyurethane elastomer not only is provided with good hydrolysis resistant performance, but also has good compatibility and low cost without the need to add auxiliary production equipment, therefore the production cost is reduced to a large extent.

Description

technical field [0001] The invention relates to a hydrolytically stable thermoplastic polyurethane elastomer containing a hydrolysis-resistant auxiliary agent and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) has both the advantages of rubber and plastic, and has excellent comprehensive properties. Poor, the scope of application is limited. [0003] The reason for the poor hydrolytic stability of thermoplastic polyurethane elastomers is that after water penetrates into the elastomer, it reacts chemically with the groups in TPU, resulting in chemical degradation, the chemical composition and physical structure of the elastomer are destroyed, and the hydrolysis is irreversible. Schol lenberger et al pointed out that the groups most sensitive to hydrolysis in TPU are ester groups, carbamate and urea groups, and the mechanism is as follows: [0004] [0005] In terms of improving the hydrolytic stability of TPU, at pr...

Claims

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Application Information

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IPC IPC(8): C08L75/06C08L75/08C08K5/29C08G18/76C08G18/22C08G18/10
Inventor 王仁鸿傅桂华张生杨永清刘学栋赵玮王东青王淑静马艳刚
Owner 烟台万华新材料科技有限公司
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