Condensation of α,ω-dihydroxypolydimethylsiloxane oligomers with 1,3-dimethyl-1,3-diphenyl-1,3-disiloxanediol diacetate

1. An investigation was made of the reaction of some α,ω-dichloropolymethylphenylsiloxane oligomers with acetic anhydride, and some α,ω-diacetoxypolymethylphenylsiloxanes were synthesized. 2. Octamethyl-1,7-tetrasiloxanediol was condensed with 1,3-dimethyl-1,3-diphenyl-1,3-disiloxanediol diacetate. The polymer formed had a higher glass point (−55°) than a polymer prepared from heptamethylphenyl-cyclotetrasiloxane (−70°).