High stability conductive elastomer for electromagnetic shielding and preparation method thereof
A technology with high stability and electromagnetic shielding, which is applied in the field of high-stability conductive elastomers for electromagnetic shielding and its preparation, can solve the problems of low tensile strength and low elongation at break, and achieve high tensile strength and tear resistance. High elongation at break, good shielding effect
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[0022] A preparation method of high-stability conductive elastomer for electromagnetic shielding, comprising the following steps:
[0023] Step 1: Put the silicone rubber into a kneader or internal mixer for mixing, add silane coupling agent, graphene, silicone oil, and internal mold release agent at a temperature of 100-120°C and mix for 10-30 minutes, then Add conductive fillers and knead for 10-30 minutes to prepare semi-finished rubber mixes;
[0024] Step 2: Mix the semi-finished rubber compound prepared in Step 1 at a temperature of 15-35°C for 10-30 minutes, then add a cross-linking agent and mix for 10-30 minutes to prepare a conductive silicone rubber compound;
[0025] Step 3: Put the silicone rubber into a kneader or internal mixer for mixing, add an internal release agent at a temperature of 15-35°C and mix for 10-30 minutes to obtain a semi-finished product of pure silicone rubber;
[0026] Step 4: Mix the semi-finished pure silicone rubber compound prepared in S...
Embodiment 1
[0032] A high-stability conductive elastomer for electromagnetic shielding, comprising the following components: the conductive filler in this implementation is nickel-coated graphite powder, and the nickel content is 60wt.%, and the silicone rubber is vinyl-terminated polydimethylsiloxane alkane silicone rubber, the silane coupling agent is vinyltriethoxysilane (A-151), the internal release agent is zinc stearate, and the crosslinking agent is 2,4-dichlorobenzoyl peroxide (DCBP ), 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (DBPMH).
[0033] A preparation method of high-stability conductive elastomer for electromagnetic shielding, comprising the following steps:
[0034] Step 1: Put 673g of silicone rubber containing vinyl-terminated polydimethylsiloxane into an internal mixer for mixing, and add 13g of vinyltriethoxysilane (A-151) at a temperature of 110°C, Mix 15 minutes after 13g zinc stearate, then add 1272g nickel-clad graphite powder and mix 15 minutes to make the mix...
Embodiment 2
[0041] A high-stability conductive elastomer for electromagnetic shielding, comprising the following components: the conductive filler in this implementation is nickel-coated graphite powder, and the nickel content is 60wt.%, and the silicone rubber is vinyl-terminated polydimethylsiloxane alkane silicone rubber, the silane coupling agent is vinyltriethoxysilane (A-151), the internal release agent is zinc stearate, and the crosslinking agent is 2,4-dichlorobenzoyl peroxide (DCBP ), 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (DBPMH).
[0042] Step 1: Put 720g of silicone rubber containing vinyl-terminated polydimethylsiloxane into an internal mixer for mixing, and add 14g of vinyltriethoxysilane (A-151) at a temperature of 100°C, After 14g zinc stearate, knead for 30 minutes, then add 1224g nickel-clad graphite powder and knead for 30 minutes to make the semi-finished rubber mix;
[0043] Step 2: Mix the semi-finished rubber compound prepared in Step 1 at 15°C for 30 minutes...
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