US Patent 7858708 Propylene-ethylene-butene block copolymer and molded article thereof

Patent 7858708 was granted and assigned to Sumitomo Chemical on December, 2010 by the United States Patent and Trademark Office.

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Patent

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Current Assignee

Sumitomo Chemical

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7858708

Date of Patent

December 28, 2010

Patent Application Number

12064647

Date Filed

August 29, 2006

Patent Primary Examiner

‌

Jeffrey C Mullis

Patent abstract

A propylene-ethylene-butene block copolymer is provided which includes from 60 to 85% by weight of a polypropylene portion and from 15 to 40% by weight of a propylene-ethylene-butene random copolymer portion, wherein the copolymer satisfies the requirements (1) and (2) given below. In addition, a molded article including such a propylene-ethylene-butene block copolymer is provided.

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