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Self-curing conductive silicone rubber with electromagnetic shielding performance and preparation method thereof

An electromagnetic shielding and self-curing technology, applied in the field of non-metallic functional materials, can solve the problems of lack of electromagnetic shielding ability, high temperature resistance, oil resistance, poor acid and alkali resistance, etc., achieve excellent flame retardancy and mechanical properties, and simple construction , Simple and time-saving construction

Inactive Publication Date: 2020-05-08
武汉楚辰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the self-curing silicone rubbers on the market are insulators and do not have electromagnetic shielding capabilities. Most of the materials with electromagnetic shielding are based on PE, PET, SBS, EVA, etc., and are formed by mixing and processing. It needs to be heated to a certain temperature with a heat source before it can be used, and its performance in high temperature resistance, oil resistance, acid and alkali resistance is relatively poor, and it cannot meet higher requirements

Method used

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  • Self-curing conductive silicone rubber with electromagnetic shielding performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Mix 100 parts of α,ω-dihydroxypolydimethylsiloxane with a viscosity of 80000mPa·s, 30 parts of aluminum hydroxide, 30 parts of ammonium polyphosphate, 15 parts of hydrophobic fumed silica, and 2 parts of pigment Put carbon black and 60 parts of silver-coated copper powder into the material cavity of the vacuum kneader several times in small amounts, control the temperature at 100°C-120°C, and knead in high temperature vacuum for 1 hour to make the materials evenly mixed and remove residual moisture;

[0026] Step 2: After mixing, cool down to room temperature;

[0027] Step 3: Add 2 parts of γ-aminopropyltriethoxysilane, 10 parts of methyl tributylketoximosilane, and 0.2 parts of dibutyltin dilaurate to the kneader in turn, and knead continuously for 1- 2h, make the liquid component evenly dispersed in the paste rubber; (whether it is lack of diluent)

[0028] Step 4: The compounded rubber is extruded through a single-screw extruder and molded, and then cut and...

Embodiment 2

[0030] The preparation method of the self-curing conductive silicone rubber with electromagnetic shielding performance in Example 2 is exactly the same as in Example 1, except that in Example 2, the aluminum hydroxide is 15 parts, and the ammonium polyphosphate is 15 parts. The proportions of other ingredients are exactly the same.

Embodiment 3

[0032] The preparation method of the self-curing conductive silicone rubber with electromagnetic shielding performance in Example 3 is exactly the same as in Example 1, except that in Example 3, the aluminum hydroxide is 45 parts, and the ammonium polyphosphate is 45 parts. The proportions of other ingredients are exactly the same.

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Abstract

The invention provides self-curing conductive silicone rubber with electromagnetic shielding performance and a preparation method thereof. The self-curing conductive silicone rubber with electromagnetic shielding performance is prepared from the following components: 100 parts of liquid silicone rubber, wherein each 100 parts of liquid silicone rubber correspondingly comprising: 10 to 15 parts ofcross-linking agent, 1 to 5 parts of coupling agent, 0.1 to 0.5 part of catalyst, 10 to 50 parts of a first flame retardant, 10 to 50 parts of a second flame retardant, 10 to 20 parts of reinforcing filler, 1 to 5 parts of coloring agent and 30 to 90 parts of conductive filler. The invention relates to a self-curing conductive silicone rubber with electromagnetic shielding performance and a preparation method thereof. The electromagnetic shielding material has certain tensile strength and elongation at break, and can be cured by contacting moisture in air at normal temperature, and the cured product has excellent corrosion resistance, water resistance, weather resistance and flame retardancy, has the functions of shielding, sealing and the like, has high shielding performance, is convenient to use, and can be used for electromagnetic shielding of cables, joints and other parts.

Description

technical field [0001] The invention relates to non-metallic functional materials, more specifically, to a self-curing conductive silicone rubber with electromagnetic shielding performance and a preparation method thereof. Background technique [0002] Self-curing silicone rubber is a kind of base material with self-leveling or thixotropy, which is prepared from linear polyorganosiloxane with a medium degree of polymerization as the base polymer, together with fillers, various additives and additives. Generally, large-scale processing equipment is not required for use, and it can be extruded, injected, and coated according to the variety and application, and then exposed to moisture in the air to cross-link and vulcanize to form an elastomer. It can play the role of sealing, anti-corrosion, connection, waterproof, etc., and has been widely used in electrical, communication, electric power and military industries. [0003] At present, most of the self-curing silicone rubbers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K13/02C08K3/22C08K3/32C08K3/36C08K3/04C08K3/08C08K5/544C08K5/5465
CPCC08K3/04C08K3/08C08K3/22C08K3/32C08K3/36C08K5/544C08K5/5465C08K13/02C08K2003/0806C08K2003/085C08K2003/2227C08K2003/323C08K2201/001C08L2201/02C08L83/04
Inventor 张灿王宏华姜灵青程太品饶欢陈虹
Owner 武汉楚辰新材料科技有限公司