| 摘要 |
<p>Bayer 3740-LH:fv ELASTOMERIC ORGANOPOLYSILOXANES CONTAINING POLYCARBODIIMIDE-POLYSILOXANE COPOLYMERS 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.degree.C and comprising a structural unit of the formula 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 polycarbodiimide components of the copolymer are present as distinguishable phases. Le A 19 083 -US</p> |
