| 摘要 |
A mixture of 100 parts by weight of a homogeneous mixture of 50 to 85 weight percent of an organodialkoxysiloxy endblocked polydiorganosiloxane, 10 to 35 weight percent hexamethyldisilazane, 4 to 30 weight percent water and 0 to 15 weight percent organotrialkoxysilane and from 125 to 250 parts by weight of a metal oxide filler, such as aluminum oxide is a silicone elastomer composition with increased extrusion rate after the volatile materials have been removed. Adding organotrialkoxysilane and organotitanate catalyst to the devolatized composition provides a one package silicone elastomer which is stable in the absence of moisture but curable upon exposure to moisture. The mixtures are prepared by mixing the polymer, hexamethyldisilazane, water and organotrialkoxysilane into a homogeneous mixture and thereafter adding the metal oxide filler and removing the volatiles under reduced pressure and adding organotrialkoxysilane and organotitanate catalyst to provide the silicone elastomer composition which is stable in the absence of moisture but curable upon exposure to moisture.
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