Sheet and tube siloxane polymers containing a pendent organofunctional group

摘要

Gels, cast films, coatings, extruded rods, extruded fibers, compression molded discs and machined compression molded discs, are made from organopolysiloxane sheet or tube polymers such as an apophyllite-derived 3cyanopropyldimethyl siloxy sheet polymer of the formula Ä((NCC3H6) (CH3) 2SiO) x (HO1-xSiO1.5)n. Polymers are prepared by contacting sheet or tube silicates with an organohalosilane containing at least one polar group such as cyanoalkyl, acyloxy or haloalkyl, in the presence of a polar solvent or a mixture of a polar solvent and a non-polar solvent; and heating the mixture until a polymer is formed.