Method of production of polymers transplants by grafting alphamethylstyrene and acrylonitrile, a composition for the implementation of this process and polymers transplants high resistance to impact, obtained by this

摘要

P the present invention relates to the field of polymers grafted. / p & & p & the method of the invention consists in grafting, in aqueous medium, of the alpha - para-methylstyrene, and a nitrile copolymerizable monomer, such as acrylonitrile, on a skeleton of diene rubber, containing at least 30% of small particles, this rubber being, in particular, the polybutadiene or a poly (styrene butadiene -). The reaction is carried out using an anionic emulsifier and a free radical polymerization initiator soluble in water, such as a persulphate. / p & & p & the invention makes it possible to obtain polymers grafted with a high temperature of the deformation under heat, and a balanced assembly of the tensile strength properties of resistance to impact and / p