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High dielectric constant silastic used for electric stress control and preparation method and application thereof

A high dielectric constant, silicone rubber technology, used in rubber insulators, organic insulators, etc., can solve the problems of flame-retardant silicone rubber wire and cable containing halogen, which is not environmentally friendly, physical and mechanical properties, and electrical conductivity. , excellent mechanical properties, simple process effect

Active Publication Date: 2011-07-20
GUANGDONG BIOMAX SIANDF NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Chinese patent (CN101236807) discloses a method for making high-temperature-resistant silicone rubber halogen-free wire and cable or casing, which uses addition-type vulcanized silicone rubber tubes to solve the problem that flame-retardant silicone rubber wires and cables contain halogens and are not environmentally friendly.
[0009] The existing patents cited above all have shortcomings and deficiencies in many aspects such as the reaction monomer used, chemical reaction mechanism, electrical conductivity and dielectric constant performance.
For example, the by-products produced by metals will pollute the environment, the use of metal bases as conductive fillers will increase the cost, the dielectric constant and electrical conductivity will increase, and the physical and mechanical properties will decrease, etc.

Method used

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  • High dielectric constant silastic used for electric stress control and preparation method and application thereof

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Effect test

Embodiment 1

[0039] Contains 45 parts of silicon dioxide, 40 parts of acetylene carbon black, B a TiO 3 80 parts of 17 parts of base rubber, 40 parts of organopolysiloxane, 6 parts of organohydrogen polysiloxane, 0.8 parts of fluorosilicon multipolymer, 0.2 parts of plasticizer, Pt-Cat. (platinum chromium compound) 0.1 parts by weight, 0.3 parts by weight of pigment, uniformly mixed by kneading, the speed ratio of the roller is 3.0; the distance between the rollers is 4mm, water cooling is adopted, and the temperature is controlled at 40°C. Then, the conventional thermal vulcanization extrusion molding method is used to obtain the silicone rubber tube of the present invention at a vulcanization traction temperature of 260 ° C, a rapid vulcanization setting channel temperature of 680 ° C, and an extrusion speed of 60 rpm. Test its comprehensive physical properties: hardness, Shore A: 41; tensile strength, Mpa: 5.7; tear strength, KN / m: 33; elongation at break, %: 560; volume resistivity, ...

Embodiment 2

[0041] Contains 40 parts of silicon dioxide, 25 parts of acetylene carbon black and B a TiO 3 10 parts of 20 parts of base rubber, 40 parts of organopolysiloxane, 1 part of organohydrogen polysiloxane, 2 parts of fluorosilicone multipolymer, 0.2 parts by weight of plasticizer, 0.2 parts by weight of polymerization inhibitor, Pt- Cat. (platinum chromium compound) 0.1 weight part, pigment 0.2 weight part, uniformly mixed by kneading, the speed ratio of the roller is 2.0; the distance between the rollers is 5mm, water cooling is adopted, and the temperature is controlled at 35°C. Then use the conventional thermal vulcanization extrusion molding method to obtain the product of the present invention at a vulcanization traction temperature of 250° C., a rapid vulcanization setting channel temperature of 700° C., and an extrusion speed of 50 rpm. Test its comprehensive physical properties: hardness, Shore A: 34; tensile strength, Mpa: 5.7; tear strength, KN / m: 34; elongation at bre...

Embodiment 3

[0043] Contains 30 parts of silicon dioxide, 30 parts of acetylene carbon black and B a TiO 3 40 parts of 15 parts of base rubber, 60 parts of organopolysiloxane, 3.5 parts of organohydrogen polysiloxane, 1.5 parts of fluorosilicone multipolymer, 0.2 parts by weight of plasticizer, 0.2 parts by weight of polymerization inhibitor, Pt- Cat. (platinum chromium compound) 0.1 weight part, pigment 0.1 weight part, uniformly mixed by kneading, the speed ratio of the roller is 2.0; the distance between the rollers is 3mm, water cooling is adopted, and the temperature is controlled at 25°C. Then use the conventional thermal vulcanization extrusion molding method to obtain the product of the present invention at a vulcanization traction temperature of 240° C., a rapid vulcanization setting channel temperature of 300° C., and an extrusion speed of 20 rpm. Test its comprehensive physical properties: hardness, Shore A: 34; tensile strength, Mpa: 5.7; tear strength, KN / m: 34; elongation at...

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Abstract

The present invention provides a high dielectric constant silastic used for electric stress control and a preparation method and an application thereof. The silastic is prepared by the following components according to parts by weight: 40-70 parts of organopolysiloxane, 1-6 parts of organic hydrogenated polysiloxane, 0.8-3.0 parts of fluorine silicon multipolymer, 10-80 parts of base rubber, catalyst with routine type and routine dosage and inhibitor; the base rubber comprises the following components according to parts by weight: 30-45 parts of fumed silica treated by hydrophobization with organosilicon compound adopted, 25-40 parts of acetylene black and 10-20 parts of BaTiO3. The invention also provides a preparation method of the above silastic, comprising the following steps: each component and one or more of appropriate platinum catalyst, palladium catalyst or rhodium catalyst and / or butynol inhibitor are subjected to blending, refining, filtering and remilling to prepare the silastic. The invention also provides an application of the silastic, namely, the prepared gross rubber is sliced, extruded and formed by vulcanization to prepare the high dielectric constant silicone rubber tube.

Description

technical field [0001] The invention relates to a high dielectric constant silicone rubber used for electric stress control, a preparation method and application thereof, and belongs to the technical field of cable accessories. Background technique [0002] Electric power is an important industry related to the national economy and people's livelihood. Electric energy has become an indispensable and important energy source in people's work and life, and the transmission of electric energy has also been put on a new agenda. It goes without saying that power cable accessories are necessary devices for connecting the cable body, connecting the cable with overhead transmission lines and equipment in each substation, and realizing power transmission. In recent years, with the development of the electric power industry and the popularization of power cables, the consumption of cable accessories has increased significantly, new products have emerged, and product quality and applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K3/36C08K3/24C08K3/04C08L83/07B29B7/72B29C35/02B29C47/92H01B3/28B29C48/92
CPCB29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92923
Inventor 王卫国陈子达黄振宏
Owner GUANGDONG BIOMAX SIANDF NEW MATERIAL CO LTD