excess water on an aspirator the silanols remaining from the hydrolysis were converted to vinyl termination by a reaction of the product oil with 0 5 ml of dimethylvinylisopropylaminosilane followed by a final vacuum stripping on an aspirator 114 of the above product oil was charged to a small change can mixer along we 34 gram of hexamethyldisilazane treated high surface area silica filler and mixed for 2 hours at 100 u00b0 c the batch was cooled to room temperature and 0 035 g of a 3 4 platinum octanol complex at 3 4 platinum along with 0 05 grams of ethynlcyclohexanol and 3 8 grams of a copolymer oil which is 50 wt 3 3 3 trifluoropropylmethysiloxane and 50 wt dimethylsiloxysilicate resin of with 5500 ppm hydride content this mixture was cured in at 75 mil astm mold for 20 minutes at 177 u00b0 c and post cured at 300 u00b0 f for 4 hours 500 g aliquots of diol a from example 1 are placed in a 500 ml flask to which was added 0 02 g of 50 naoh solution and heated to 50 u00b0 c under aspirator vacuum to condense silanol groups of diol and produce diols of higher chain length and lower silanol contents the vacuum is removed at various times to control the amount of condensation that occurs using this procedure diols of lower silanol content that the 6 2 silanol of diol a could be obtained chain lengths can be calculated from the.