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1. (WO2013153501) SILICONE RUBBER SEALING GLUE USED IN MEDIUM AND HIGH VOLTAGE CABLE ACCESSORIES AND CABLE ACCESSORIES

Pub. No.:    WO/2013/153501    International Application No.:    PCT/IB2013/052794
Publication Date: Fri Oct 18 01:59:59 CEST 2013 International Filing Date: Tue Apr 09 01:59:59 CEST 2013
IPC: C09J 183/04
Applicants: TYCO ELECTRONICS (SHANGHAI) CO. LTD.
TYCO ELECTRONICS UK LTD
Inventors: LI, Yugang
LI, Peng
YANG, Lizhang
Title: SILICONE RUBBER SEALING GLUE USED IN MEDIUM AND HIGH VOLTAGE CABLE ACCESSORIES AND CABLE ACCESSORIES
Abstract:
The present invention relates to silicone rubber sealing glue used in medium and high voltage cable accessories and its preparation method and cable accessories. The sealing glue contains a) a first siloxane polymer containing a repeating unit represented by Formula (I): RaSiO(4-a)/2, wherein group R is a substituted or unsubstituted group containing 1 to 20 carbon atoms, a is 0, 1, 2 or 3, wherein number-average molecular weight of the first siloxane polymer is from 150000 to 900000 g/mol; b) a second siloxane polymer containing a unit represented by Formula (I), wherein kinematic viscosity of the second siloxane polymer is from 5000 cst to 100Mcst; and c) filler; wherein the filler accounts for more than 10% of the sealing glue in weight. Compared with prior arts, the second siloxane polymer molecule used in the sealing glue of the present invention is relatively big and the second siloxane polymer is difficult to penetrate into rubber body. Therefore, performance of the rubber body is not easily affected by the sealing glue, which can prolong life of the rubber body and stabilize quality of protection for cable headend.