Toren, McGeady, Stanger, Goldberg & Kiel
Two-way curable silicon rubber composition
 The silicone rubber composition of the invention essentially comprises (a) a silanolic hydroxy-terminated diorganopolysiloxane, (b) a hydrolyzable vinyl silane compound such as a vinyl trialkoxysilane and (c) an organopolysiloxane having at least two mercapto groups in the form of, for example, 3-mercaptopropyl groups, in a molecule. The composition can be cured by two different mechanisms of crosslink formation one by the condensation reaction between the silanol groups in (a) and the hydrolyzable groups in (b) in the presence of atmospheric moisture and the other between the vinyl groups in (b) and mercapto groups in (c) under irradiation with ultraviolet light. The two-way cruability of the composition greatly expands the application fields of the silicone rubber composition. 
Shin-Etsu Chemical Co., Ltd.
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Takehide Yoshio
Okami Inoue