Process for preparing high-performance urethane elastomer

A technology of polyurethane elastomer and production method, which is applied in the production field of cast polyurethane elastomer, and can solve problems such as large heat generation, difficult to meet product application, large compression deformation, etc.

Inactive Publication Date: 2008-12-10
汕头市澄海区盐鸿工业胶辊有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the cast polyurethane elastomer synthesized by traditional formula technology is used in the manufacture of products with higher hardness (such as: hardness greater than 90A), there are weaknesses such as insufficient rebound performance, large compression deformation, and large internal heat generation during wear. Satisfy the application of the product under the conditions of engraving

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 30 kilograms of ethylene glycol adipate and 426 grams of diethylene glycol listed in the above synthesis process, put them into a 100-liter reactor, and dehydrate at 110-130 ° C and maintain a certain degree of vacuum for 2 to 10 minutes. After 3 hours, the water content of sampling analysis is less than 0.5%, and the -NCO content of the production design prepolymer is 7%, then it is calculated that M-100 needs to be added, which is 14 kg.

[0023] Cool the dehydrated ethylene glycol adipate and diethylene glycol mixture to below 60°C, add dissolved M-100 kept at 40-50°C, mix and react for 15-30 minutes, then gradually raise the temperature to 80-50°C Under the condition of 85°C, heat preservation reaction for 2 to 3 hours, sample analysis shows that the -NCO content is 6.8%, and then vacuum degasses for use, and then calculates the chain extension required for 100 parts by weight of the prepolymer according to the -NCO content Agent 1.4-butanediol is 7 parts ...

Embodiment 2

[0026] Weigh 40 kilograms of ethylene glycol adipate and 568 grams of diethylene glycol of the quality standards listed in the above synthesis process, put them into a 100-liter reaction kettle, and dehydrate at 110-130 ° C and maintain a certain vacuum degree for 2 to 10 liters. After 3 hours, the water content was less than 0.5% for sampling and analysis, and the -NCO content of the prepolymer designed for production was 8.5%, then it was calculated that M-100 needed to be added, which was 22.24 kg.

[0027] Cool the dehydrated ethylene glycol adipate and diethylene glycol mixture to below 60°C, add dissolved M-100 kept at 40-50°C, mix and react for 15-30 minutes, then gradually raise the temperature to 80-50°C Under the condition of 85°C, heat preservation reaction for 2 to 3 hours, sample analysis shows that the -NCO content is 8.4%, and then vacuum degasses for use, and then calculates the chain extension required for 100 parts by weight of the prepolymer according to ...

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Abstract

The invention discloses a method for producing a high-performance polyurethane elastomer, comprising the following steps in turn: (A). macromolecular polylol, diisocyanate (OCN-R-NCO) and micromolecular polylol are mixed according to the mass portion of 100 to 27-65 to 1-5 to synthesize a prepolymer; and (B). the prepolymer obtained in step A and chain extender micromolecular polylol generate chain extension crosslinking reaction according to the mass portion of 100 to 3-10, and then the polyurethane elastomer is produced through casting and sulfuration techniques. The polyurethane elastomer prepared according to the method has more superior comprehensive physical characteristics than a polyurethane elastomer synthesized by the prior formula, and has low interior heat build-up under the condition of dynamic abrasiveness and superior tear strength; and various physical characteristics of the polyurethane elastomer are all superior to the cast polyurethane elastomer prepared by the prior formula. The production process of the method is easy, practical, environment-friendly and energy-saving, and the production cost is low.

Description

technical field [0001] The technology of the invention relates to the production field of casting polyurethane elastomer. Background technique [0002] The formula of traditional casting polyurethane elastomer is composed of diisocyanate <ocn-r-nco>Mix and react with hydroxyl-terminated macromolecular polyols (polyester polyols or polyether polyols) at specific temperatures and conditions to produce isocyanate-terminated prepolymers, and then prepare the prepolymers in specific conditions. Under temperature and conditions, it is fully mixed with small molecule polyol or small molecule polyamine (the amount of chain extender is calculated from the content of -NCO in the prepolymer) to carry out chain extension reaction, and after casting and vulcanization. High molecular polymers are produced, that is, polyurethane elastomers with urethane linkages or amine-substituted urea linkages. [0003] However, when the cast polyurethane elastomer synthesized by traditional f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/12
Inventor 杨喜荣
Owner 汕头市澄海区盐鸿工业胶辊有限公司
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