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Three-component polyurethane elastomer composition with high wear resistance

A polyurethane elastomer, three-component technology, applied in the field of polyurethane elastomer, can solve the problems of reduced comfort, high production cost, and inconvenient popularization by the whole people

Active Publication Date: 2010-06-23
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the high-resilience wheel material of the polytetrahydrofuran system has good elasticity and wear resistance, the production cost is high and it is not convenient for the general public
However, the common polyether polyurethane elastomer with low price has less than 50% impact rebound and poor wear resistance. The pulley made of it is less comfortable when sliding and has a short service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Polymer component: functionality 3, number average molecular weight 5000, cyclopolypropylene oxide ether trihydric alcohol (330N) 98.4%, reinforcing agent 0.5%, organic bismuth catalyst 0.1% and UV-328 0.5%, 1076 0.5% is dehydrated at 100-110°C and -0.095MPa until the water content is less than 0.05%, and the polymer component is obtained.

[0026] (2) Prepolymer component: 9% polyoxypropylene ether diol (DL-400) with 2 functionalities and molecular weight of 400, polyoxypropylene ether diol (DL-3000) with number average molecular weight of 3000 ) 63.1%, TDI-80 27.9% react at 70°C to 90°C to obtain a prepolymer with an isocyanate content of 10%.

[0027] (3) Reaction part (during product production): Mix the chain extender E-100 component and the polymer component at a ratio of 15:85, and the mixing temperature is 35°C. Then the mixed component is quickly mixed with the prepolymer component at a ratio of 100:100 and poured into a mold, vulcanized and molded at 70°C...

Embodiment 2

[0029] The chain extender E-100 component is mixed with the composition component of Example 1 at a ratio of 19:44 (63 parts in total), and then the mixed component is quickly mixed with the prepolymer component at a ratio of 63:100 Stir well and pour into a mold, vulcanize and mold at 70°C to 80°C, and open the mold for 20 minutes to obtain a product with a hardness of Shore 95A.

Embodiment 3

[0031] (1) Polymer component: functionality 3, number average molecular weight 5000, polypropylene oxide ether trihydric alcohol (330N) 80%, functionality 2, number average molecular weight 1000 polypropylene oxide ether polyol 18%, 0.8% of reinforcing agent, 0.2% of bismuth catalyst, 0.5% of UV-328, 10760.5% are dehydrated at 100-110°C and -0.095MPa until the water content is less than 0.05%, and the polymer component is obtained.

[0032] (2) Prepolymer component: 80% of polyether polyol (DL-2000) with 2 functionalities and molecular weight of 2000, TDI-80 20% is reacted at 70°C to 90°C to obtain an isocyanate content of 6%. the prepolymer.

[0033] (3) Reaction part (during product production): Mix the chain extender component and the polymer component at a ratio of 10:40, and the mixing temperature is 35°C. Then the mixed component is quickly mixed with the prepolymer component at a ratio of 50:100 and poured into a mold, vulcanized and molded at 70°C to 80°C, and molded ...

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Abstract

The invention relates to a three-component polyurethane elastomer composition with high wear resistance, which comprises a prepolymer component, a polymer component and a chain extender component, wherein diisocyanate reacts with polyol to obtain a prepolymer of which the NCO content is 6%-10%, wherein the diisocyanate is preferably TDI-80, and the polyoxypropylene polyol of which the molecular weight is 400-3000 and the functionality is 2 is adopted; the polymer component is prepared from polyoxypropylene polyol of which the molecular weight is 1000-5000 and the functionality is 2 or 3, reinforcing agent, catalyst and anti-aging agent; and in the process of production, the temperature of the polymer component and the temperature of the chain extender component are controlled at 30+ / -5 DEG C, after the polymer component and the chain extender component are mixed and stirred uniformly according to a certain proportion, the mixture is mixed with the prepolymer component according to a certain proportion, the mixture is placed and solidified at 70-80 DEG C for 20 minutes, and the obtained product has excellent wear resistance and impact resilience. The invention is mainly used for manufacturing high-elastic skate wheels or skateboard wheels.

Description

technical field [0001] The invention belongs to the field of polyurethane elastomers, in particular to a high wear-resistant three-component polyurethane elastomer. . Background technique [0002] Polyurethane is a polymer synthetic material with excellent performance. It has both the elasticity of rubber and the hardness of plastic, and it also has good mechanical properties, wear resistance and resilience. Using its advantages, it can be used to make pulley shoes. wheel. Although the high-resilience wheel material of the polytetrahydrofuran system has good elasticity and wear resistance, the production cost is high and it is not convenient for the general public. And the common polyether type polyurethane elastomer of cheap price is all below 50% impact rebound, and wear resistance is poor, and the comfort degree reduces when the pulley made with it slides, and service life is short. Contents of the invention [0003] The technical problem to be solved by the present ...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L71/02C08G18/10C08G18/66
Inventor 陈海良张芳贾雪琴
Owner SHANDONG INOV POLYURETHANE
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