Siloxane co-polymers

摘要

The invention comprises copolymers consisting essentially of from 5 to 25 mol. per cent units of the formula in which R is a monovalent hydrocarbon radical, with or without substituents, and from 75 to 95 mol. per cent of monophenylsiloxane. The copolymers may be mixed with fillers, e.g. glass roving, glass fabric, asbestos fibres, diatomaceous earth, sand, clays, Al2O3, TiO2, Fe2O3 and C black, and thereafter moulded to form articles of improved mechanical strength. In a typical example (1) the copolymer obtained by cohydrolysis of phenyltrichlorosilane and (Ph=phenyl) was used for making a 6-ply glass cloth laminate (see Group VIII).