C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/5309
C08L 83/04 (2006.01)
Patent
CA 1141060
Bayer 3740-LH:fv ELASTOMERIC ORGANOPOLYSILOXANES CONTAINING POLYCARBODIIMIDE-POLYSILOXANE COPOLYMERS ABSTRACT A composition which is heat-curable to give an elastomer of improved resistance to hydrolytic degradation comprising a) an organopolysiloxane polymer having a viscosity of about 1,000,000 to 200,000,000 mPas at 25°C and comprising a structural unit of the formula Image wherein R is a monovalent hydrocarbon, halohydrocarbon or cyanohydrocarbon, and a is between about 1.95 and 2.01, b) a polycarbodiimide-polysiloxane copolymer, c) a curing catalyst, and d) a filler, The polycarbodiiamide-polysiloxane copolymer is responsible for improved stability and preferably the polysiloxane and poly- carbodiimide components of the copolymer are present as distinguishable phases. Le A 19 083 -US
338809
Kniege Wilfried
Michel Werner
Moretto Hans-Heinrich
Steinberger Helmut
Fetherstonhaugh & Co.
Ge Bayer Silicones Gmbh & Co. Kg
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