Propylene polymer and copolymers grafted with vinylpolybutadiene and their preparation process

摘要

Crystalline propylene (co)polymers modified by grafting with a vinylpolybutadiene having 1,2-structure content of at least l0%. The (co)polymers are reacted with a liquid vinylpolybutadiene in the presence of a non-peroxidic radical initiator at a temperature in the range 200 DEG to 350 DEG C., the liquid vinylpolybutadiene having a 1,2-structure content of at least 10% and being generally used in amounts within the range 0.5 to 20% by weight.