Oblon, Spivak, McClelland, Maier & Neustadt
High-strength silicon rubber compositions
 Silicone rubber compositions, of the addition curable type, comprise as a base polymer a vinyl-containing organopolysiloxane having a tetraorganosilethylenesiloxane unit of the following general formula: ##STR1## wherein R.sup.1 to R.sup.4 are each a monovalent hydrocarbon group of from 1 to 10 carbon atoms. The silicone rubber composition gives a cured product having high strength, for example, a tensile strength of 30 kg/cm.sup.2 or above, without compounding fillers or reinforcing agents. 
Shin-Etsu Chemical Co., Ltd.
C
C08L
inventional
Shinichi Hiroshi Toshio Hitoshi Hirokazu
Sato Inomata Takago Kinami Yamada