NON-COATED SILICONE ELASTOMER COMPOSITION, RETICULABLE BY POLYADDITION, AND ITS APPLICATIONS IN THE MANUFACTURE OF IN SITU JOINTS AND AS A GLUE PARTICULARLY FOR SELLERIE

摘要

The invention relates to silicone elastomer compositions which can be crosslinked by polyaddition. The objective is to develop a silicone elastomer crosslinkable by polyaddition, which is non-flowing and preferably self-adherent. This objective is achieved by the invention, which is intended to be non-flowable silicone elastomer composition, crosslinkable by polyaddition, of the type comprising polyorganosiloxanes (POS) bearing C2-C6 alkenyl equiv-Si units and of equiv-Si-H units, characterized in that it contains at least one agent thixotropant containing at least one fluorinated resin, preferably based on polyfluoroethylene (PFE) and more preferably still based on polytetrafluoroethylene (PTFE). This composition can be obtained from a polydimethylsiloxane PDMS Si-Vi and a PDMS Si-H crosslinked by Pt catalysis. It is added with polytetrafluoroethylene, a filler particularly siliceous, optionally an adhesion promoter. ternary (vinyltrimethoxysilane / glycidoxypropyltrimethoxysilane / butyl orthotitanate) to be self-adhesive, and other usual additives.The invention also relates to the application of this composition for the production of joints in situ and / or as an adhesive (especially for upholstery).