Unsaturated polysiloxanes, polymerizable compositions and contact lenses therefrom

摘要: Unsaturated polysiloxanes, polymerizable compositions and contact lenses thereof Abstract of the Disclosure Polysiloxanes uniform molecular weight (MW) distribution with 400-10,000 MW segments polysiloxane containing at least one vinyl group connected to said through intervening alkylene-urea or -urethane linkages are prepared from polysiloxane-polyols, -polyamines -polythiols by reaction an unsaturated compound isocyanato moiety, for example 2-isocyanatoethyl methacrylate. The polysiloxanes groups useful as radiation- thermally curable coatings glass, textiles, plastics, wood, ceramics, metals, films bandages medicinal purposes, molded shapes, in form lenses, catheters implants, either themselves combination other monomers; particularly preparing hard soft including hydrogel lenses.