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Method for manufacturing automobile damper with polyurethane composite material

A technology of polyurethane composite material and automobile shock absorber is applied in the field of preparing automobile shock absorber from polyurethane composite material, which can solve the problems of dark bubbles with many capillary pores, easy shrinkage deformation, poor fluidity, etc., and achieves wide foaming range and fluidity. good, strong effect

Inactive Publication Date: 2012-06-27
无锡双象新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, ordinary polyester products on the market have relatively high viscosity, poor fluidity, and many dark bubbles and capillaries. Due to the special structure of the shock absorber mold like a spring, some large pinholes and holes will be formed on the surface of the product after the product is formed. Dark air bubbles, when the product density is low, it is easy to shrink and deform, and some products have poor strength and will break when folded

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing automobile shock absorbers with polyurethane composite material, the steps are as follows in parts by weight:

[0025] (1) Preparation of component A: Take 195 parts of polyester polyol A, 25 parts of polyester polyol A, 5 parts of diol, 0.3 part of triol, 0.5 part of DC3042 silicone oil, 0.5 part of DC3043 silicone oil, and 0.6 parts of defoamer 3 parts of water, 0.3 parts of water and 3 parts of physical foaming agent are put into the reaction kettle, heated to 60-80°C, and stirred for 1-3 hours;

[0026] The acid value of the polyester polyol A1 is 0.1mgKOH / g, the hydroxyl value is 70mgKOH / g, and the molecular weight is 1400g / mol; the acid value of the polyester polyol A2 is 0.1mgKOH / g, and the hydroxyl value is 58mgKOH / g, The molecular weight is 1700g / mol; both are obtained by reacting ethylene glycol and diethylene glycol with adipic acid.

[0027] (2) Preparation of component B: Take 100 parts of diphenylmethane diisocyanate and 5 parts of ...

Embodiment 2

[0034] The formula of component A is as follows: 185 parts of polyester polyol A, 210 parts of polyester polyol A, 7 parts of diol, 0.3 part of triol, 0.6 part of DC3042 silicone oil, 0.5 part of DC3043 silicone oil, 0.4 part of defoamer, 0.4 part of water 3 parts and 3 parts of physical blowing agent;

[0035] The acid value of the polyester polyol A1 is 0.5mgKOH / g, the hydroxyl value is 74mgKOH / g, and the molecular weight is 1600g / mol; the acid value of the polyester polyol A2 is 0.5mgKOH / g, and the hydroxyl value is 62mgKOH / g, The molecular weight is 1900g / mol; A1 is obtained by the reaction of diethylene glycol, 1,4-butanediol and adipic acid; A2 is obtained by the reaction of ethylene glycol and adipic acid.

[0036] The formula of component B is as follows: 100 parts of diphenylmethane diisocyanate, 0.001 part of phosphoric acid, 10 parts of modified diphenylmethane diisocyanate, 150 parts of polyester polyol B and 225 parts of polyether polyol B;

[0037] The acid valu...

Embodiment 3

[0042] The formula of component A is as follows: 185 parts of polyester polyol A, 210 parts of polyester polyol A, 7 parts of diol, 0.3 part of triol, 0.6 part of DC3042 silicone oil, 0.6 part of DC3043 silicone oil, 0.5 part of defoamer, 0.4 part of water 3 parts and 3 parts of physical blowing agent;

[0043] The acid value of the polyester polyol A1 is 0.3mgKOH / g, the hydroxyl value is 72mgKOH / g, and the molecular weight is 1500g / mol; the acid value of the polyester polyol A2 is 0.3mgKOH / g, and the hydroxyl value is 60mgKOH / g, The molecular weight is 1800g / mol; A1 is obtained by the reaction of 1,4-butanediol and adipic acid; A2 is obtained by the reaction of diethylene glycol and adipic acid.

[0044] The formula of component B is as follows: 100 parts of diphenylmethane diisocyanate, 0.001 part of phosphoric acid, 8 parts of modified diphenylmethane diisocyanate, 145 parts of polyester polyol B and 215 parts of polyether polyol B;

[0045] The acid value of the polyester p...

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Abstract

Belonging to the technical field of auto part manufacturing, the invention relates to a method for manufacturing an automobile damper with a polyurethane composite material. The method comprises: adding a component C catalyst into component A, and stirring them uniformly, then pouring them into the machine tank of a low pressure casting machine, and conducting thermal insulation; then adding component B and the above mixed solution into a low pressure machine and carrying out stirring, injecting the mixture into a damper die for foaming, then spraying a release agent, thus obtaining an automobile damper. The polyurethane composite material prepared in the invention has the advantages of low viscosity, good fluidity, fewer dark bubbles, wide foaming scope, and no need for heating before use. And the automobile damper product manufactured with the polyurethane composite material is characterized by light weight, good strength, good elasticity, good smooth finish, fewer dark bubbles, no shrinkage, easy processing, and good elasticity, thus being very popular with automobile manufacturers.

Description

technical field [0001] The invention relates to a method for preparing an automobile shock absorber by using a polyurethane composite material, and belongs to the technical field of automobile parts manufacturing. technical background: [0002] In the prior art, polyester resins are generally used to produce shock absorbers, which are light in weight, high in strength, easy to process, and good in elasticity, and are very popular among automobile manufacturers. At present, ordinary polyester products on the market have relatively high viscosity, poor fluidity, and many dark bubbles and capillaries. Due to the special structure of the shock absorber mold like a spring, some large pinholes and holes will be formed on the surface of the product after the product is formed. Dark bubbles, when the product density is low, it is easy to shrink and deform, and some products have poor strength and will break when folded. Contents of the invention [0003] The purpose of the presen...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/42C08J9/14C08L75/08C08G101/00
Inventor 何天华毛本春刘敏
Owner 无锡双象新材料有限公司
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