Process for the modification of an olefin polymer to form a coupling agent.

摘要

The invention relates to a process for the modification of an olefin polymer to form a coupling agent by grafting it with an unsaturated acid or acid derivative in the presence of a free-radical initiator. The process comprises stages at which a) the olefin polymer, the unsaturated acid or acid derivative and a first free-radical initiator are heated together to a first temperature, at which the first free-radical initiator substantially breaks down into free radicals, and b) the reaction mixture derived from stage a) is heated together with a second free-radical initiator to a second temperature, at which the second free-radical initiator substantially breaks down into free radicals. By the process, olefin polymers can be modified effectively without their macromolecules degrading excessively. a