CROSSLINKED COMPOSITIONS CONTAINING SILANE-MODIFIED POLYOLEFIN BLENDS

摘要

A moisture-crosslinkable polyolefin material, comprising a silane-grafted polyolefin blend, and coatings or insulations, including heat-shrinkable coatings and insulations, prepared therefrom. The coating material is formed by a process comprising: (a) reacting a pre--blended mixture of polyolefin and polypropylene, or higher polyolefin, resins and optional compatibilising agent, with an appropriate silane and silane-grafting initiator to produce a silane-modified polyolefin blend composition; (b) forming the coating or insulating material by melt processing the composition produced in step (a) with a silanol condensation catalyst; and (c) crosslinking the formed coating or insulating material by exposing it to moisture, preferably at an elevated temperature.