Title: Polymer compositions

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.

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Inventors: Penneck, Richard John (Lechlade, EN)

Application Number: 540447
Filing Date: 1975-01-13
Publication_date: 1976-07-13
Assignee: Raychem Limited (London, EN)
Primary Class(es): 523/212 174/DIG1, 524/506, 525/101, 525/105, 525/106
Other Classes:
US Patent Ref:

2859198	Nov, 1958	Sears et al.	260/37.
2867603	Jan, 1959	Safford et al.	260/37.
2888419	May, 1959	Safford	260/37.
2993809	Jul, 1961	Bueche et al.	260/37.
3079361	Feb, 1963	Plueddemann	260/37.
3290165	Dec, 1966	Iannicelli	260/37.
3326869	Jun, 1967	Perrone	260/37.
3341490	Sep, 1967	Burdick et al.	260/37.
3538028	Nov, 1970	Morgan	260/37.

Other Refs:
Primary Examiner: Jacobs, Lewis T.
Assistant Examiner:
Attorney: Lyon & Lyon