High-transparency polyurethane elastomer

A polyurethane elastomer and transparent technology, applied in the field of polyurethane elastomers, can solve the problems of unsightly appearance, high production cost, short service life, etc., and achieve the effects of avoiding oxidative discoloration, fast initial strength, and short demoulding time.

Inactive Publication Date: 2011-05-04
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, common polyether polyurethane elastomers with low price have 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. Below 60%, the appearance is not beautiful

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Polymer component: functionality 3, number average molecular weight 5000, cyclopolypropylene oxide ether triol (330N) 98.4%, organic bismuth catalyst 0.1% and UV-3280.5%, 10760.5% at 100-110°C , Dehydration at -0.095MPa to less than 0.05% moisture to obtain polymer components.

[0024] (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-8027.9% reacted at 70°C to 90°C to obtain a prepolymer with an isocyanate content of 10%.

[0025] (3) Reaction part (during product production): Mix the chain extender E-100 component and the polymer component at a mass ratio of 15:85, and the mixing temperature is 35°C. Then the mixed component is quickly mixed with the prepolymer component in a mass ratio of 100:100 and poured into a mold, vulcanized and molded at 70°C to 80°C, and opened in 20 minutes to obtain a product...

Embodiment 2

[0027] 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

[0029] (1) Polymer component: functionality 3, number average molecular weight 5000, polypropylene oxide ether trihydric alcohol (330N) 80.8%, functionality 2, number average molecular weight 1000 polypropylene oxide ether polyol 18%, Bismuth catalyst 0.2%, UV-3280.5%, 10760.5% are dehydrated at 100-110°C and -0.095MPa until the water content is less than 0.05%, to obtain polymer components.

[0030] (2) Prepolymer component: 80% polyether polyol (DL-2000) with 2 functionalities and molecular weight of 2000, TDI-8020% reacted at 70℃~90℃ to obtain 6% isocyanate content prepolymer.

[0031] (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 for 20 minutes to obtain a product with a hardness of Shore 75A....

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Abstract

The invention discloses a high-transparency polyurethane elastomer, which is of a system of three components, namely a prepolymer component, a polymer component and a chain extender component, wherein in the prepolymer component, diisocyanate reacts with polyalcohol to generate a prepolymer, the NCO of which is 6 to 10 percent, the diisocyanate is preferably selected from toluene diisocyanate 80 (TDI-80), and the polyalcohol is polyepoxy propane ether polyalcohol, the number average molecular weight of which is in a range of 400 to 3,000 and the functionality of which is 2; and the polymer component is prepared from polyepoxy propane ether polyalcohol, catalyst and anti-ageing agent, wherein the molecular weight of the polyepoxy propane ether polyalcohol is 1,000 to 5,000, and the functionality of the polyepoxy propane ether polyalcohol is 2 or 3. When the product is produced, the temperatures of the polymer component and the chain extender component are controlled at 30 +/- 5 DEG C, the polymer component and the chain extender are mixed in a certain ratio and stirred uniformly, then the polymer component and the chain extender are mixed with the prepolymer component in a certain ratio, and the mixture is placed and cured for 20 to 30 minutes at the temperature of between 70 and 80 DEG C to obtain a product with excellent abrasion resistance and impact resilience. The high-transparency polyurethane elastomer is mainly used for manufacturing high-elasticity ice skate wheels or skateboard wheels.

Description

technical field [0001] The invention belongs to the field of polyurethane elastomers, in particular to a highly transparent 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. However, common polyether polyurethane elastomers with low price have 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. Below 60%, the appearance is not beautiful. Contents of the invention [0003] The technical problem to be solved by th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/32C08G18/48C08G18/22C08G18/12C08G18/10C08L75/08
Inventor 李健陈海良张芳宋淑芳
Owner SHANDONG INOV POLYURETHANE
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