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Single-component deamination-type high-conductivity silicone rubber and preparation method thereof

A deaminated, highly conductive technology, applied in adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of difficult, waste, and uneven mixing of adhesive conductive silicone rubber. To achieve the effect of simple preparation, good bonding, and simple curing method

Inactive Publication Date: 2013-10-16
SHANGHAI KUIGU RUBBER & PLASTIC PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Of the two conductive rubbers mentioned above, one is two-component addition curing, which has certain limitations. It cannot be cured normally after being exposed to compounds containing N, S, P, Sn, Pb, etc.
The other is two-component packaging, which is not convenient for the operation of the dispenser. It is often mixed unevenly on many two-component glue mixing equipment, which requires debugging and wastes a lot
[0008] For conductive silicone rubber, the curing method is simple, that is, room temperature curing; easy to operate, suitable for machine dispensing, that is, single-component packaging; excellent curing, not affected by contact objects, that is, the catalyst will not be poisoned; good adhesion Conductive silicone rubber has always been a difficult point, especially the one-component deaminated conductive adhesive has rarely been reported

Method used

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  • Single-component deamination-type high-conductivity silicone rubber and preparation method thereof
  • Single-component deamination-type high-conductivity silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The formula of one-component deaminated high-conductivity silicone rubber, calculated in parts by weight, includes the following components:

[0046] Conductive adhesive intermediate:

[0047] 10 parts of hydroxyl terminated polydimethylsiloxane

[0048] 0.3 parts of simethicone

[0049] 12 parts of nano calcium carbonate

[0050] 0.03 parts of silica

[0051] 0.02 parts of hexamethyldisilazane

[0052] One-component deaminated high-conductivity silicone rubber:

[0053] 21 parts of conductive intermediate

[0054] 68 parts silver-plated nickel powder

[0055] 0.08 parts of methyltricyclohexylaminosilane

[0056] 0.01 parts of γ-aminopropyltriethoxysilane

[0057] 0.01 part dibutyltin dilaurate

[0058] 10.9 parts petroleum ether

[0059] A single-component deaminated high-conductivity silicone rubber with a tensile strength greater than 2.0MPa, an elongation greater than 50%, a Shore A hardness of 71, and a volume resistivity of 6.7mΩ.cm was obtained.

Embodiment 2

[0061] The formula of one-component deaminated high-conductivity silicone rubber, calculated in parts by weight, includes the following components:

[0062] Conductive adhesive intermediate:

[0063] 15 parts of hydroxyl terminated polydimethylsiloxane

[0064] 0.1 parts of octamethylcyclotetrasiloxane

[0065] 10 parts microsilica

[0066] 0.03 parts of silica

[0067] 0.02 parts of vinyltrimethoxysilane

[0068] One-component deaminated high-conductivity silicone rubber:

[0069] 32 parts of conductive intermediate

[0070] 54 parts nickel-coated graphite

[0071]0.08 parts of methyltris(methylpropyl)aminosilane

[0072] 0.01 parts of γ-aminopropyltriethoxysilane

[0073] 0.01 part dibutyltin dilaurate

[0074] 13.9 parts of toluene

[0075] A single-component deaminated high-conductivity silicone rubber with a tensile strength greater than 1.5MPa, an elongation greater than 150%, a Shore A hardness of 60, and a volume resistivity of 15mΩ.cm was obtained.

Embodiment 3

[0077] The formula of one-component deaminated high-conductivity silicone rubber, calculated in parts by weight, includes the following components:

[0078] Conductive adhesive intermediate:

[0079] 20 parts trimethoxy-terminated polydimethylsiloxane

[0080] 1 part simethicone

[0081] 18 parts of nano calcium carbonate

[0082] 0.8 parts of silica

[0083] 0.02 parts of hexamethyldisilazane

[0084] One-component deaminated high-conductivity silicone rubber:

[0085] 20 parts conductive intermediate

[0086] 65 parts silver-plated copper powder

[0087] 0.1 parts of methyltricyclohexylaminosilane

[0088] 0.01 parts of γ-aminopropyltriethoxysilane

[0089] 0.01 part tin acetate

[0090] 14.88 parts xylene

[0091] A one-component deaminated high-conductivity silicone rubber with a tensile strength greater than 1.8MPa, an elongation greater than 70%, a Shore A hardness of 68, and a volume resistivity of 7.8mΩ.cm was obtained.

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Abstract

The invention discloses single-component deamination-type high-conductivity silicone rubber and a preparation method thereof. The single-component deamination-type high-conductivity silicone rubber comprises organosilicon base polymers, reinforcement filler, conductive filler, thixotropic agents, plasticizer, crosslinking agents, coupling agents, catalysts, solvent and performance assistant. The preparation method comprises the following steps: firstly performing dehydration to the fillers; then performing planetary stirring to enable a mixture to uniformly dispersed; removing air; packaging in a sealed manner; obtaining the single-component deamination-type high-conductivity silicone rubber. The single-component deamination-type high-conductivity silicone rubber prepared through the preparation method has the advantages of simple curing way, favorable adhesion and simple preparation, is suitable for the operation of a glue dispenser, and is applicable to shielding adhesion in mobile phone base stations, communications and the military industrial field.

Description

technical field [0001] The invention relates to a rubber and a preparation method thereof, in particular to a single-component deaminated high-conductivity silicone rubber and a preparation method thereof. Background technique [0002] Conductive silicone rubber, at present, is to add conductive fillers to the rubber material of silicone rubber, mainly including carbon black, graphite, metal powder, alloy, metal oxide, fiber and so on. Can be added alone or used together. [0003] With the rapid development of modern technology, all kinds of electronic equipment are widely used, and the impact of electromagnetic waves on electronic equipment and human health is highlighted. Therefore, electromagnetic wave shielding devices are more widely used in various electronic equipment. The stability of electromagnetic shielding and The precision requirements are getting higher and higher, especially the shielding requirements for high-precision military and aerospace electronic equip...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J183/07C09J11/08C09J11/04C09J11/06
Inventor 周如江綦大勇倪福祥
Owner SHANGHAI KUIGU RUBBER & PLASTIC PROD
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