Use of nitric oxide to reduce reactor pollution during graft copolymerization of polypropylene

摘要

Production of a graft copolymer comprises, in a non- oxidising environment: (a) treating a propylene polymer material (A) with an organic free radical polymerisation initiator; (b) treating (A) simultaneously or sequentially with 5-240 parts by weight (pts.wt.) per 100 pts.wt. (A) of a free radical polymerisable grafting monomer(s); and (c) removing any unreacted grafting monomer from the resulting grafted propylene polymer material, decomposing any unreacted initiator, and deactivating any residual free radicals in the material, wherein (a) and (b) are carried out in the presence of nitric oxide that is added in an inert gas as 0.05-50 ppm, based on the inert gas, to reduce reactor fouling.