C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
400/7218
C08G 77/06 (2006.01) C08K 3/00 (2006.01) C08L 83/06 (2006.01)
Patent
CA 1246275
POLYMERIZATION OF POLYDIORGANOSILOXANE IN THE PRESENCE OF FILLER Abstract A method of polymerizing hydroxyl-endblocked polydiorganosiloxane in the presence of filler, including acidic fillers such as fumed silica, through the use of basic diorganosilanolate catalysts is disclosed. Preferred diorganosilanolates are tetra-n-butylphosphonium dimethyl- silanolate and potassium dimethylsilanolate. The silicone polymer-filler mixture produced is useful in silicone greases and elastomers. Methods of combining the silicone polymer-filler mixture with various curing agents to yield curable compositions are claimed.
447036
Bokerman Gary N.
Langley Neal R.
Dow Corning Corporation
Gowling Lafleur Henderson Llp
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