Process for filled diorganopolysiloxane elastomers

Abstract From the Canadian patent

An improved process is provided for preparing compositions capable of being converted into elastomers. The compositions are ones containing (A) triorganosiloxy-terminated diorganopolysiloxanes having at least one vinyl group in each terminal units (B) triorganosiloxy-terminated organopolysiloxanes containing organonydrogensiloxane units and diorganosiloxane units (C), fillers, which are hydrophobic or are capable of being rendered hydrophobic and having a surface area of at least 50 m2/g and (D) catalysts which promote the addition of SiH groups to vinyl groups, and preferably also diorganopolysiloxanes (E) having on the average for each molecule, as terminal units two diorgano-, …