Method for producing silicone rubber moldings having a hard exterior layer
 The present invention provides a method for producing silicone rubber moldings composed of a uniform, smooth and hard exterior layer and a relatively soft interior portion. In accordance with this method the surfaces of the mold cavity are coated with an organohydrogenpolysiloxane containing at least two silicon-bonded hydrogen atoms before the curable organosiloxane used to form the interior portion of the molding is injected into the mold cavity and cured. 
Toray Silicone Company, Ltd.
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Keiji Mitsuo Koji
Yoshida Hamada Shimizu