Modified polypropylenes - grafted with cis-unsatd alicyclic carboxylic acids for improved adhesion to inorganic fibres

摘要

Crystalline polypropylene and one or more alicyclic carboxylic acids with a cis double bond in the ring or their anhydrides, are heated together in presence of a substance producing free radicals. Adhesion to fibres esp. to glass, and to metals is greatly improved by the grafting process. Fibres coated with the modified polypropylenes in soln. show better adhesion to polyolefines. The modified polypropylenes can be readily coloured, esp. with basic dyes, printed and plated, without roughening the surface.