Polysiloxane compound
    18.
    发明授权

    公开(公告)号:US2851472A

    公开(公告)日:1958-09-09

    申请号:US54403355

    申请日:1955-10-31

    CPC classification number: C07F7/0849 C08F30/08 C08G77/20

    Abstract: The invention comprises the compound 1,1,1,5,5,5 - hexamethyl - 3 - trimethylsiloxy-3-vinyl trisiloxane of the formula: CH2=CHSi[OSi(CH3)3]3, and polymers thereof. The compound may be prepared by (1) cohydrolysis of vinyl trichlorosilane and trimethylchlorosilane in an aqueous organic solvent system; (2) reaction of tris-(trimethylsiloxy) silane with acetylene; or (3) equilibration of hexamethyl disiloxane with triethoxyvinylsilane. The compound polymerizes to soluble, linear polymers and may be copolymerized with other olefinic compounds such as styrene, acrylonitrile, vinyl acetate, vinyl chloride and N-vinyl pyrrolidone and with sulphur dioxide. The trisiloxane or its copolymers may also be equilibrated with siloxanes such as dimethyl siloxanes.

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