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A kind of polyurethane elastomer shock absorber material and preparation method

A polyurethane elastomer and shock absorber technology, applied in the material and preparation of elastomer shock absorbers, in the field of elastomer shock absorbers, can solve problems such as unfavorable stiffness and stability, and achieve strong resistance to hydrolysis and biodegradation. performance, good resilience and low temperature performance, effect of stiffness reduction

Inactive Publication Date: 2011-11-30
NORTHWEST RUBBER & PLASTIC RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the factor of temperature, that is, the characteristic that the degree of crystallization changes significantly with temperature, is very unfavorable to the stability of stiffness in the temperature range of the product.

Method used

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  • A kind of polyurethane elastomer shock absorber material and preparation method
  • A kind of polyurethane elastomer shock absorber material and preparation method
  • A kind of polyurethane elastomer shock absorber material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Formulation: (A) Polymer polyol

[0053] Tetrahydrofuran homopolyether polyol 80 parts

[0054] ε-polycaprolactone polyol 20

[0055] (B) Polyisocyanate

[0056] Toluene diisocyanate (TDI) 29.5 parts

[0057] (C) Chain extension cross-linking agent

[0058] 10 parts of dichlorodiaminodiphenylmethane (MOCA)

[0059] Dimethylthiotoluenediamine (DMTDA) 5 parts

[0060] Its preparation method:

[0061] 10kg of polymer polyol prepared in proportion is dehydrated, and vacuum dehydrated at a temperature of 110-130°C until the water content is less than 0.5‰. When cooling to 70°C, add 2.95kg of toluene diisocyanate, control the reaction temperature between 80-85°C, and react for 2 hours under stirring to obtain a prepolymer; take 1000g of the prepolymer at a temperature of 100°C with MOCA 100g and DMTDA 50g were mixed by manual pouring method, stirred rapidly for about 60 seconds; vacuum degassed for 2-3 minutes; poured into a mold at 100°C, demolded after 24 hours, and ...

Embodiment 2

[0063] Formulation: (A) Polymer polyol

[0064] Tetrahydrofuran propylene oxide copolyether polyol 90 parts

[0065] 10 parts of polyester such as butylene adipate polyol

[0066] (B) Polyisocyanate

[0067] 38 parts of diphenylmethane diisocyanate (MDI)

[0068] (C) Chain extension cross-linking agent

[0069] 1.4 butanediol 21.8 parts

[0070] Its preparation method:

[0071] For the dehydration of 200kg polymer polyol, under the temperature condition of 120~130°C, carry out vacuum dehydration for 1 hour until the water content is less than 0.5‰. When cooling to 60°C, add 76kg of diphenylmethane diisocyanate, control the reaction temperature between 75°C and 80°C, and react under stirring for 2 hours to prepare a prepolymer. Take the prepolymer and transfer it to the prepolymer storage tank of the polyurethane elastomer pouring machine, set the temperature at 100°C; put 1.4 c in the crosslinking agent storage tank of the pouring machine, set its temperature at 65°C. A...

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Abstract

The invention relates to a polyurethane elastomer shock absorber material and a preparation method. The present invention is formed from the following three components (A), (B) and (C) through a two-step polymerization reaction. This elastomer material has excellent mechanical properties and extremely stable stiffness maintenance over the operating temperature range. Among them (A) polymer polyol, (B) polyisocyanate, (C) low molecular polyol, ammonia chain extension cross-linking agent, (A) uses an optimized combination of polyether and polyester, and the present invention is used for The application of elastomer buffering and shock absorption can greatly reduce the volume and weight of equipment shock absorption system components, and solve the problem of large changes in the stiffness of polyurethane elastomer materials despite temperature. At the same time, the invented material has high rebound, low pressure change, hydrolysis resistance and Biodegradability, thereby expanding the application scope of polyurethane materials in elastomer shock absorption.

Description

1. Technical field [0001] The invention relates to a material of an elastic body shock absorber and a preparation method thereof. Specifically, it is a polyurethane elastomer shock absorber material with high bearing performance and good stiffness stability under high and low temperature changes and a preparation method thereof. The invention is mainly applied to elastic body shock absorbers of mechanical equipment and vehicles, etc., and elastic body shock absorbers of wind power generation equipment that have strict requirements on the bearing capacity and stiffness stability of materials. 2. Background technology [0002] Among organic elastomeric materials, polyurethane elastomers possess the best mechanical properties, including tensile strength, tear strength and abrasion resistance. As a high-load elastomer shock absorber material, polyurethane elastomer can still have good rubber elasticity and elongation in the range of high hardness (Shore 80A~80D). Ordinary rubbe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32C08G18/12
Inventor 郑健敏
Owner NORTHWEST RUBBER & PLASTIC RES & DESIGN INST CO LTD
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