Room temperature vulcanized conductive silicon rubber and preparation method thereof

Abstract

The invention discloses low-modulus high-intensity room temperature vulcanized conductive silicon rubber, which is prepared from the following ingredients by weight parts: 100 parts of silicon rubber crude rubber, 10 to 30 parts of conductive filling materials, 2 to 5 parts of cross linking agents and 0.2 to 2 parts of catalysts through mixing and molding pressing. The room temperature vulcanized conductive silicon rubber has excellent physical performance, the tearing intensity can reach 21.1 kN / m, the break extension percentage is 1500 percent, the 100 percent modulus is 0.79 MPa, and the 300 percent modulus is 1.30 MPa. The room temperature vulcanized conductive silicon rubber can be used for producing various high-stretching conductive rubber products such as electric plug connectors, electric sealing shock absorption elements, conductive connectors and the like, can be widely applied to various fields such as electronics and electrics, communication, traffic, chemical engineering, medical science, toys, machinery, boats and the like, and has good economic benefits and application value.

Description

technical field [0001] The invention relates to a room temperature vulcanized silicone rubber and a preparation method thereof, in particular to a low modulus, high strength room temperature vulcanized conductive silicone rubber and a preparation method thereof, belonging to the technical field of conductive polymer composite materials. Background technique [0002] Conductive silicone rubber is the most used conductive rubber. With the rapid development of electronic instruments with weak current characteristics represented by computers, its research and development are becoming more and more active. The current research papers or patents are mainly conductive silicone rubber composite materials, and their conductive properties are realized by adding conductive fillers, such as metal or metal oxide nanoparticles or carbon black, to the silicone rubber matrix, such as U.S. Pat.5082596, U.S. Pat.5217651, CN200510029718, etc. Because metals and their oxides are hard inorganic...

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Problems solved by technology

However, the increase in strength of the above methods is not outstanding, and it is impossible to obtain conductive silicone rubber with excellent electrical conductivity and physical properties.