Polymers of the benzene phosphonic acid dichloride and 4,4 '- thiodiphenol and their application to contribute a first delay in the inflammation of the compositions of polyester.

摘要

P the present invention relates to a copolymer of the benzene phosphonic acid dichloride and 4,4 '- thiodiphenol. It also relates to compositions of the polyesters containing an effective quantity to impart a delay in the inflammation of the copolymer. / p & & p & the present invention relates to polymers of phosphonates resinous polymers having properties of the ignition delay to be improved and relates to compositions of polyesters containing said polymers. / p