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Silicon rubber/conductive ethylene propylene terpolymer and its preparing method

A technology of EPDM rubber and EPDM, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of high cost, poor strength and durability of conductive silicone rubber, and achieve good product quality, The effect of low cost and simple and easy preparation method

Inactive Publication Date: 2004-01-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the disadvantages of high cost, poor strength and durability of conductive silicone rubber, the present invention provides a silicone rubber / EPDM combined conductive rubber and a preparation method thereof. Through the combined use of conductive silicone rubber and EPDM, the mechanical properties are much better than those of conductive silicone rubber. Conductive and rubber of silicone rubber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0021] First, mix EPDM raw rubber and silicone rubber raw rubber together on the open mill to the front roll of the tight package, add white carbon black, mix evenly, add conductive carbon black, mix evenly, add the coupling agent bis(3- Triethoxysilylpropyl) tetrasulfide (Si69) and dicumyl peroxide (DCP), thin pass 10 times, one-stage vulcanization and two-stage vulcanization to obtain and use conductive rubber. Its hardness is: 75 (ShoreA), tensile strength: 13.51MPa, tear strength: 37.4kN / m, elongation at break: 306.9%, volume resistivity: 6.57×10 2 Ω·cm. Embodiment 2: silicone rubber / EPDM combined with conductive rubber raw material components are as follows, all in parts by weight: EPDM raw rubber, the third monomer is 5-ethylidene-2-norbornene (ENB) 66 parts methyl vinyl silicone rubber raw rubber, molecular weight 580,000, vinyl molar content 0.05% to 0.50% 34 parts γ-(methacryloxy)propyl trimethoxysilane (A-174) 7.8 Parts 2,5-dimethyl-2,5-di(t-butylperoxy)hexane (bis...

Embodiment 3

[0023] First mix EPDM raw rubber and silicone rubber raw rubber together on the open mill to the front roll of the tight package, add white carbon black, mix evenly, add conductive carbon black, mix evenly, add coupling agent Si69 and peroxide Dicumyl benzene DCP, thin pass 10 times, one-stage vulcanization, two-stage vulcanization to obtain and use conductive rubber. Its hardness is: 75 (ShoreA), tensile strength: 9.36MPa, tear strength: 23.96kN / m, elongation at break: 270.4%, volume resistivity: 9.31×10 2Ω·cm. Embodiment 3: silicone rubber / EPDM combined with conductive rubber raw material components are as follows, all in parts by weight: EPDM raw rubber, the third monomer is 5-ethylidene-2-norbornene (ENB) 90 parts of methyl vinyl silicone rubber raw rubber, molecular weight 580,000, vinyl molar content 0.05% to 0.50% 10 parts of bis(3-triethoxysilylpropyl) tetrasulfide (Si69) 7.8 Dicumyl peroxide (DCP) 6.7 parts VXC-72 conductive carbon black 40 parts 4# fumed white carb...

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Abstract

The present invention relates to a silicone rubber / EPT conductive rubber and its preparation method. Its raw material composition includes EPT rubber raw rubber, silicone rubber raw rubber, silane coupling agent, organic peroxide, carbon black and white carbon black, and its preparation method includes the following steps: adopting open double roller mixing machine, successively mixing them uniformly, sheeting, rolling and others. Said invention conductive rubber has good mechanical property, and its preparation method is simple, its cost is low and its product quality is good.

Description

(1) Technical field [0001] The invention relates to a novel conductive rubber, which belongs to the technical field of conductive polymer composite materials. (2) Background technology [0002] Conductive silicone rubber compounded by filling conductive fillers (carbon black, carbon fiber, metal powder, etc.) into silicone rubber, because it does not contain processing oil and softening agents such as dibutyl phthalate and dioctyl phthalate agent, plasticizer or vulcanization accelerator, etc., so it will not cause environmental pollution due to leakage and fogging, it is the most suitable electronic component material, coupled with the inherent excellent weather resistance and high and low temperature resistance of silicone rubber, making conductive silicone rubber become Currently the largest amount of conductive rubber. The largest market for conductive silicone rubber is the contact material for keys. As far as the durability of the keyboard is concerned, the durability...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/14C08L23/16H01B1/24
Inventor 张洁冯圣玉
Owner SHANDONG UNIV
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