Example 5
Both end dimethylvinylsiloxy-capped dimethylpolysiloxane having an average DOP of 1,800, 65 parts, was mixed with 40 parts of fumed silica having a BET specific surface area of 300 m2/g (Aerosil 300 by Nippon Aerosil Co.), 8 parts of hexamethyldisilazane, 0.1 part of 1,3-divinyl-1,1,3,3-tetramethyldisilazane (vinyl content 0.0116 mol/g), and 2.0 parts of water at 25° C. for 30 minutes. The mixture was heated at 150° C., continuously stirred for 3 hours, and cooled, obtaining a silicone rubber base. This silicone rubber base had a very high viscosity and was difficult to handle, with any further study interrupted.
