Low hardness polyurethane elastic body composite

A polyurethane elastomer and composition technology, applied in the field of polyurethane elastomer, can solve the problems of low production efficiency, limitation, long curing time, etc., and achieve the effect of high production efficiency, comfortable hardness and hand feeling, and convenient industrial production

Active Publication Date: 2010-07-21
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyurethane is a polymer synthetic material with properties between rubber and plastic. It is characterized by a wide range of hardness adjustment. It has both the elasticity of rubber and the hardness of plastic. The usual low-hardness polyurethane elastomers are added by adding a lot of Plasticizers a...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Polymer components: 20% polyether polyol with functionality 2 and molecular weight 1000, 78% polyether polyol (PPG330N) with functionality 3 and molecular weight 3000, organic bismuth catalyst 1%, UV-329 0.5%, 1010 0.5 % prepared according to the method of the present invention.

[0026] Prepolymer: 45% of polyether polyol with 2 functionalities and molecular weight of 1000, 55% of liquefied MDI, reacted at 70°C to 90°C for 2 to 3 small vacuums (-0.095MPa) to remove bubbles, and obtain isocyanate content 10% prepolymer.

[0027] The prepolymer and the polymer component are mixed at a ratio of 100:20, the mixing temperature is 25°C-40°C, the vulcanization temperature of the product is 60°C-70°C, and the vulcanization is 8 minutes to obtain a Shore 5A polyurethane elastomer product.

Embodiment 2

[0029] Polymer components: 5% polyether polyol with functionality 3 and molecular weight 300, 93% polyether polyol (PPG330N) with functionality 3 and molecular weight 5000, bismuth catalyst 0.5%, zinc catalyst 0.5%, UV-3280.5% , 1010 0.5% prepared according to the method of the present invention.

[0030] Prepolymer: 65% of polyether polyol with 2 functionalities and molecular weight of 3000, MDI30%, liquefied MDI5%, reacted at 70℃~90℃ for 2~3 small vacuums (-0.095MPa) to remove bubbles and obtain iso Prepolymer with 7% cyanate content.

[0031] The prepolymer and the polymer component are mixed at a ratio of 100:35, the mixing temperature is 25°C-40°C, the product vulcanization temperature is 60°C-70°C, and vulcanized for 5 minutes to obtain a Shore 20A polyurethane elastomer product.

Embodiment 3

[0033] Polymer component: 10% of polyether polyol with functionality 2 and molecular weight 2000, 88.5% of polyether polyol with functionality 3 and molecular weight 6000, bismuth catalyst 0.5%, UV-531 0.5%, BHT 0.5% according to the present invention Prepared by the method described.

[0034] Prepolymer: 62% of polyether polyol with 2 functionalities and molecular weight of 2000, MDI30%, and liquefied MDI8% are reacted at 70°C to 90°C for 2 to 3 small vacuums (-0.095MPa) to remove air bubbles and obtain isocyanide Prepolymer with 10% acid group content.

[0035] The prepolymer and the polymer component are mixed at a ratio of 100:20, the mixing temperature is 25°C-40°C, the vulcanization temperature of the product is 60°C-70°C, and the vulcanization is 8 minutes to obtain a polyurethane elastomer product of Shore 0A.

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PUM

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Abstract

The invention relates to a low hardness polyurethane elastic body composite, composed of two components of prepolymer and polymer by adopting bi-component system; wherein the prepolymer is obtained through reaction of diphenyl-methane-diisocyanate and polypropylene oxide polyatomic alcohol at 70-90 DEG C and isocyano content thereof is 7-14%, and polymer component is prepared by polypropylene oxide polyatomic alcohol, catalyst and antiaging agent. The polymer component and the prepolymer component are mixed in matching ranging from 100-20 to 100-35, so as to obtain Shaw brothers 0-20A products; the invention is mainly used for producing health care protective articles such as shoe-pad, automobile no-slip mat, bicycle seat cushion and handicapped wheelchair cushion. The obtained product is environmentally friendly and safe, has good processing performance and has comfortable handfeel.

Description

technical field [0001] The invention belongs to the field of polyurethane elastomers, in particular to a low-hardness polyurethane elastomer composition. Background technique [0002] Polyurethane is a polymer synthetic material with properties between rubber and plastic. It is characterized by a wide range of hardness adjustment. It has both the elasticity of rubber and the hardness of plastic. The usual low-hardness polyurethane elastomers are added by adding a lot of Plasticizers are obtained, so that after a period of time, the plasticizers will migrate and precipitate to the surface, which limits its use in the production of products that come into contact with the human body. Moreover, the curing time of low-hardness polyurethane elastomer products is long, and the production efficiency is low. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a low-hardness polyurethane elastomer composition. The obtained p...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08G18/76C08G18/48C08G18/10
Inventor 陈海良李健曹士强
Owner SHANDONG INOV POLYURETHANE
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