The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 1999
Filed:
Jan. 16, 1996
Tadashi Asanuma, Osaka-fu, JP;
Shigeru Kimura, Osaka-fu, JP;
Tamio Kawasumi, Kanagawa-ken, JP;
Shunji Ueda, Osaka-fu, JP;
Masami Hashimoto, Osaka-fu, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
A multi-layer blow molded article of a polypropylene comprising at least two layers, wherein at least one layer of the inner layer or layers comprises a resin composition containing 100-50 parts by weight of a syndiotactic polypropylene with an Mw/Mn of 3.0 or more and 0-50 parts by weight of an ethylene-.alpha.-olefin copolymer elastomer, and the outermost layer comprises a syndiotactic polypropylene with an Mw/Mn of less than 3.0, an isotactic polypropylene with an Mw/Mn of 6.0 or less, a resin composition containing 99-50 parts by weight of either of said polypropylenes and 1-50 parts by weight of an ethylene-.alpha.-olefin copolymer elastomer, or a polypropylene formed by heat degradation of a syndiotactic or isotactic polypropylene and having an Mw/Mn of 3.0 or more.