Propylene block copolymer
AssigneeMitsubishi Chemical Corporation
InventorsKenji Mitsutani, Kiyoshi Yukawa, Fumihiko Shimizu, Glen H. Ko, Eiji Tanaka, Fuminao Watanabe
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Abstract
The present invention provides a propylene block copolymer comprising polymer particles whose rubber-like component contents are 50% by weight or more, in an amount less than 1.0% by weight of the whole polymer particles finally discharged from a polymerization system.
Claims16
A propylene block copolymer produced by continuous polymerization method, comprising polymer particles, said polymer particles having rubber component of an α-olefin having 2 to 18 carbon atoms, and content of said rubber component being 50% by weight or more, wherein the amount of said polymer particles is less than 1.0% by weight of the whole polymer particles finally discharged from a polymerization system.
Dependencies are inferred from the claim text.