Polymer compositions
AssigneeRaychem Corporation
InventorRichard John Penneck
Life of this patent
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Abstract
A novel composition is disclosed which contains a silicone polymer, a non-silicone polymer other than polytetrafluoroethylene and a chemically treated filler. The non-silicone polymer may be an elastomer or a thermoplastic such as a polyolefin, a copolymer containing an olefin, a halogen-containing polymer or copolymer or a copolymer of fluorine-containing polymers other than polytetrafluoroethylene. The filler is an inorganic silicon-containing compound having a surface area of at least 40 square meters per gram which has been treated with a substituted silane. The treated filler is first blended with the non-silicone polymer and this compound is then mixed with the silicone polymer.
Claims5
A process for the manufacture of a composition comprising a silicone polymer, a non-silicone polymer other than polytetrafluoroethylene and a chemically treated filler, the chemically treated filler being a filler comprising an inorganic silicone-containing compound containing the Si--O--Si group and having a specific surface area (measured by the BET method) of at least 40 square meters per gram, which filler has been treated with at least one silane having bonded to each silicon atom thereof at least one organic group bonding through a silicon-carbon bond, which process comprises:
- a. blending said non-silicone polymer, said silane and said filler to form a blend of said non-silicone polymer and said treated filler;
- and blending the resulting blend with said silicone polymer.
Dependencies are inferred from the claim text.