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Ethylene-propylene-diene monomer mould pressing abnormal shape sponge sheath rubber composition

A technology of EPDM rubber and rubber composition is applied in the field of EPDM molded special-shaped sponge sheath, which can solve the problems of difficult control of dimensional stability, and achieve the effects of dimensional stability, good elasticity and good heat resistance.

Inactive Publication Date: 2013-02-27
TIANJIN PENGYI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to control the dimensional stability of special-shaped rubber sponge sheaths made of EPDM rubber. Special formula and process design are required to prepare EPDM special-shaped rubber sponge sheaths with excellent heat resistance and good dimensional stability.

Method used

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  • Ethylene-propylene-diene monomer mould pressing abnormal shape sponge sheath rubber composition
  • Ethylene-propylene-diene monomer mould pressing abnormal shape sponge sheath rubber composition
  • Ethylene-propylene-diene monomer mould pressing abnormal shape sponge sheath rubber composition

Examples

Experimental program
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Embodiment Construction

[0022] (blending unit: parts by weight)

[0023] components Example 1 Example 2 Example 3

[0024] dithiuram tetrasulfide 0.3 0.4 0.5

[0025] As can be seen from the foregoing examples, select EPDM rubber, dibenzothiazole disulfide, zinc dibutyl dithiocarbamate, tetramethylthiuram disulfide, dithiuram tetrasulfide, four kinds The combination of vulcanization accelerator, azodicarbonamide and diphenylsulfonylhydrazide ether two foaming agents and other related ingredients can prepare special-shaped sponges with excellent heat aging resistance, low density, stable size, and smooth and delicate surface. jacket.

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Abstract

The invention relates to an ethylene-propylene-diene monomer (EPDM) mould pressing abnormal shape sponge sheath rubber composition. The composition includes the components by weight: 100 parts of EPDM rubber, 60-80 parts of semi-reinforcing carbon black, 30-50 parts of paraffin oil, 3-5 parts of zinc oxide, 2-4 parts of stearic acid, 1-3 parts of polyethylene glycol, 0.3-0.5 parts of dibenzothiazole disulfide, 1.3-1.5 parts of zinc dibutyldithiocarbamate, 0.5-0.8 parts of tetramethylthiuram disulfide, 0.3-0.5 parts of dithiuram tetrasulfide, 6.5-7.5 parts of azodicarbonamide, 2.5-3.5 parts of 4,4'-oxybis(benzenesulfonyl hydrazide), and 0.8-1.2 parts of sulfur. The EPDM rubber is used in the invention. By adjusting the ratio of various components in the recipe and process conditions, the abnormal shape sponge sheath with excellent heat aging resistance, small density, stable dimension and smooth and exquisite surface can be prepared.

Description

technical field [0001] The invention relates to the technical field of rubber hoses, in particular to an EPDM molded special-shaped sponge sheath. Background technique [0002] As we all know, sponge rubber is a porous high-elastic material. It has light weight, excellent cushioning, compression, sealing and heat and sound insulation properties. It can be used as a cushioning, liner, heat insulation, sound insulation and shock absorption material. , It is widely used in various fields such as home appliances, automobiles, construction and housing. Especially in recent years, with the rapid development of the automobile industry, the working temperature in the engine compartment of the automobile has become higher and higher. It is not only required that the rubber hoses of the matching systems have good high temperature resistance, and at the same time, they must not rub against each other. This requires that the rubber sponge sheath matching the shape of the rubber hose be...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08L91/00C08K13/02C08K3/04C08K3/22C08K5/09C08J9/10C08J3/24
Inventor 张洪起王学荣
Owner TIANJIN PENGYI GRP CO LTD