Elastomeric silicone composition that cannot run, crosslinkable by polyaddition, and its applications in the manufacture of joints in situ, as well as glue, notably for saddlery

摘要

Invention Patent: "ELASTOMETER SILICONE COMPOSITION THAT CANNOT SLIDE, CROSS-LINKABLE BY POLYADIATION, AND ITS APPLICATIONS IN THE MANUFACTURE OF JOINTS IN SITU, AS WELL AS THE TITLE OF GLUE NOTELY FOR SEALING". The invention relates to polyaddition crosslinkable silicone elastomeric compositions. The aim is to develop a silicone elastomer crosslinkable by polyaddition, which does not run, and preferably self-adhering. This objective is achieved by the invention, which has as its object a silicone elastomer composition that does not drip, crosslinkable by polyaddition, of the type of those comprising polyorganosiloxanes (POS) bearing motifs sym Si-alkenyl in C ~ 2 ~ -C ~ 6 ~ and sym Si-H motifs (excluding fluorinated POS), characterized by the fact that it contains at least one thixotropic agent containing at least one fluorinated resin, preferably based on polyfluoroethylene (PFE) and most preferably based on polytetrafluoroethylene (PTFE). The composition can be obtained from a PDMS Si-Vi polydimethylsiloxane and a crosslinked PDMS Si-H by catalysis to Pt. It is added with polytetrafluoroethylene, a notably siliceous filler, possibly with a ternary adhesion promoter (vinyltrimethoxysilane / glycidoxyporpyltrimethoxy) -silane / butyl ortho-titanate) to be self-adhering, and other usual additives. The invention has as its object the application of this composition (without excluding, however, fluorinated POS as possible constituents of this composition) for the manufacture of joints in situ and / or as glue (notably for saddlery).