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:
Jul. 21, 2009
Filed:
Aug. 26, 2005
Mamoru Takahashi, Yamaguchi, JP;
Tetsuji Kasai, Yamaguchi, JP;
Junji Saito, Sodegaura, JP;
Naoto Matsukawa, Sodegaura, JP;
Kazutaka Tsuru, Sodegaura, JP;
Makoto Mitani, Sodegaura, JP;
Terunori Fujita, Sodegaura, JP;
Shiro Otsuzuki, Yamaguchi, JP;
Tetsuhiro Matsumoto, Yamaguchi, JP;
Toshiyuki Tsutsui, Yamaguchi, JP;
Mamoru Takahashi, Yamaguchi, JP;
Tetsuji Kasai, Yamaguchi, JP;
Junji Saito, Sodegaura, JP;
Naoto Matsukawa, Sodegaura, JP;
Kazutaka Tsuru, Sodegaura, JP;
Makoto Mitani, Sodegaura, JP;
Terunori Fujita, Sodegaura, JP;
Shiro Otsuzuki, Yamaguchi, JP;
Tetsuhiro Matsumoto, Yamaguchi, JP;
Toshiyuki Tsutsui, Yamaguchi, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
An ethylene (co)polymer of the present invention is a (co)polymer with excellent moldability and mechanical properties and either an ethylene homopolymer or a copolymer of ethylene and an α-olefin of 4 to 20 carbon atoms. The (co)polymer has methyl branches measured byC-NMR less than 0.1 in number per 1,000 carbon atoms and Mw/Mn measured by GPC not lower than 1.8 and lower than 4.5. The (co)polymer is either an ethylene homopolymer or a copolymer of ethylene and an α-olefin of 3 to 20 carbon atoms. The melt tension (MT) and the swell ratio (SR) satisfy the relation; log(MT)>12.9−7.15×SR; and the intrinsic viscosity ([η]) and the melt flow rate (MFR) satisfy the relation; [η]>1.85×MFRin the case of MFR<1 and the relation; [η]>1.85×MFRin the case of MFR≧1. Such an ethylene (co)polymer can be usable for various molding applications and especially suitable for pipes.