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Method for manufacturing automobile damper with polyurethane composite material

A polyurethane composite material and automobile shock absorber technology, which is applied in the field of polyurethane composite materials to prepare automobile shock absorbers, can solve the problems of dark bubbles with many pores, easy shrinkage and deformation, poor fluidity, etc. Good, strong effect

Inactive Publication Date: 2013-06-12
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 from polyurethane composite materials, 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 diols, 0.3 parts of triols, 0.5 parts of DC3042 silicone oil, 0.5 parts 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℃, stirred for 1~3h;

[0026] The polyester polyol A1 has an acid value of 0.1 mgKOH / g, a hydroxyl value of 70 mgKOH / g, and a molecular weight of 1400 g / mol; the polyester polyol A2 has an acid value of 0.1 mgKOH / g and a hydroxyl value of 58 mgKOH / g, The molecular weight is 1700g / mol; both are prepared 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 modified diph...

Embodiment 2

[0034] The formula of component A is as follows: polyester polyol A185 parts, polyester polyol A210 parts, glycol 7 parts, triol 0.3 parts, DC3042 silicone oil 0.6 parts, DC3043 silicone oil 0.5 parts, defoamer 0.4 parts, water 0.4 Parts and 3 parts of physical foaming agent;

[0035] The polyester polyol A1 has an acid value of 0.5 mgKOH / g, a hydroxyl value of 74 mgKOH / g, and a molecular weight of 1600 g / mol; the polyester polyol A2 has an acid value of 0.5 mgKOH / g and a hydroxyl value of 62 mgKOH / g, The molecular weight is 1900g / mol; A1 is prepared by the reaction of diethylene glycol, 1,4-butanediol and adipic acid; A2 is prepared 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 value of the polyester polyol B1 is 0.3 ...

Embodiment 3

[0042] The formula of component A is as follows: polyester polyol A185 parts, polyester polyol A210 parts, glycol 7 parts, triol 0.3 parts, DC3042 silicone oil 0.6 parts, DC3043 silicone oil 0.6 parts, defoamer 0.5 parts, water 0.4 Parts and 3 parts of physical foaming agent;

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

[0044] The formula of component B is as follows: 100 parts of diphenylmethane diisocyanate, 0.001 parts 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 polyol B1 is 0.5 mgKOH / g, the hydroxyl val...

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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 automobile shock absorbers using polyurethane composite materials, 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 absorber products, 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 pores. Due to the special structure of the shock absorber mold like a spring, some large pinholes and pinholes will be formed on the surface of the product after the product is molded. Dark bubbles, when the product density is low, it is easy to shrink and deform, and some products have poor strength and break when they are broken. Summary of the invention [0003] The purpose of the present inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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