silicone rubber foamed composition, manufacturing methods and silicone rubber foam of silicone rubber foam

摘要

It is possible to arbitrarily control the crosslinking state of the silicone rubber foam when the cell size and the silicone rubber foamed composition capable of controlling foaming conditions such as expansion ratio, the manufacturing method and the silicone of the silicone rubber foam It provides the rubber foam. (A) weight average polymerization degree is in a content of alkenyl groups of less than 0.001mmol / g or more 0.3mmol / g in a molecule is 4,000 10,000, polyorganosiloxane 100 parts by weight having two or more When the polyorganohydrogensiloxane having average two or more in a molecule of Si-bonded hydrogen, the amount that the molar ratio of alkenyl groups in component (A) of the hydrogen atoms is 0.001, degradation and an organic foaming agent from 0.1 to 10 parts by weight of the temperature is 50~250 ℃, and silica powder 5 to 200 parts by weight, silicone rubber foam containing, and a catalytic amount of platinum-based metal compound catalyst activated with ultraviolet light use composition.