Conductive liquid silicon rubber composition and normal temperature shrinkage rubber assembly used for high-voltage cable

Abstract

The invention provides an addition cure conductive liquid silicon rubber composition and a normal temperature shrinkage rubber assembly which comprises a curing molding object of the composition and is used for a high-voltage cable. Because the addition cure conductive liquid silicon rubber composition is low in viscosity, the addition cure conductive liquid silicon rubber composition is excellent in productbility and operationality, and can provide cured products which are excellent in electrical characteristics and rubber strength. The conductive liquid silicon rubber composition is used for being installed on a connecting part or terminal part of the high-voltage cable and holds the normal temperature shrinkage rubber assembly composition, of the connecting part or terminal part, used for the high-voltage cable. The conductive liquid silicon rubber composition comprises (A) organopolysiloxane molecule of which is provided with more than two silicon atom bonding allyl groups; (B) organic hydrogen-containing poiysiloxane molecule of which is provided with more than three silicon atom bonding hydrogen atoms; (C) gas phase made silicon dioxide BET specific surface area of which is 50-400 m<2>/g; (D) furnace black containing less than 0.1% by mass of sulfur; (E) addition reaction catalyst the viscosity of which is 200-2000 Pa*s at 23 DEG C at a 0.9 s<-1> shear velocity.

Description

technical field [0001] The present invention relates to a conductive liquid silicone rubber composition for providing a silicone rubber molded product for a room temperature shrinkable rubber member used in a high-voltage cable, and particularly relates to a silicone rubber molded product excellent in conductivity and workability (low viscosity) ( Normal temperature shrinkable rubber member) conductive liquid silicone rubber composition and a normal temperature shrinkable rubber member for high voltage cables comprising its cured molded product. Background technique [0002] Generally, for the connection part of the high-voltage cable of 6600V or higher and the terminal part of the high-voltage cable, a substantially cylindrical (or bamboo wheel-shaped) silicone rubber molded product having an opening at one or both ends is usually used. . [0003] At this time, when a high-voltage cable is inserted into a roughly cylindrical silicone rubber molded product at room temperatu...

AI Technical Summary

Problems solved by technology

However, in the production of this conductive silicone rubber, when curing and molding a conductive liquid addition-curable silicone rubber composition, a composition containing a large amount of conductive filler such as carbon black in order to ensure conductivity is usually Since it has a very high viscosity, it takes a lot of time for the injection process during molding, so there are problems in terms of productivity, workability, etc.