HEAT WELDABLE VULCANIZATE COMPRISING POLYOLEFIN RUBBER AND PROPYLENE POLYMER

摘要

A heat-weldable vulcanised polyolefin rubber based product containing 5 to 100 parts by weight per 100 parts by weight of polyolefin rubber, of one or more propylene polymers selected from homopolymers and copolymers of propylene with up to 20% by weight of ethylene, butene-1 or hexene-1. The propylene polymer has a heptane-extractable content of 5 to 60% by weight, an I-value of 100 to 600 cm3/g and a yield stress of 10 to 30 N/mm2. The products exhibit improved weldability to each other and to conventional vulcanised polyolefin rubber products and some non-vulcanised polyolefin rubbers.