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:
Feb. 07, 2006
Filed:
Jul. 26, 2001
Norio Kashiwa, Chiba, JP;
Shinichi Kojoh, Chiba, JP;
Shingo Matsuo, Chiba, JP;
Junji Saito, Chiba, JP;
Terunori Fujita, Chiba, JP;
Makoto Mitani, Chiba, JP;
Mamoru Takahashi, Chiba, JP;
Yasuo Sato, Chiba, JP;
Norio Kashiwa, Chiba, JP;
Shinichi Kojoh, Chiba, JP;
Shingo Matsuo, Chiba, JP;
Junji Saito, Chiba, JP;
Terunori Fujita, Chiba, JP;
Makoto Mitani, Chiba, JP;
Mamoru Takahashi, Chiba, JP;
Yasuo Sato, Chiba, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
The present invention relates to a polymer having a melt tension (MT (g)) substantially the same as or lower than that of a conventional polymer which is substantially the same as the polymer in the recurring unit of the main skeleton, the molecular weight, the molecular weight distribution and the crystallinity, and having a flow activation energy (Ea (KJ/mol)) larger than a value obtained by adding 5 KJ/mol to the Ea value of the conventional polymer. A preferred example of the polymer is a branched polyolefin comprising 50 to 100% by mol of recurring units derived from ethylene and 0 to 50% by mol of recurring units derived from an α-olefin of 3 to 20 carbon atoms and having the following properties: the flow activation energy (Ea (KJ/mol)) and the α-olefin content (C (% by weight)) satisfy a specific relation, and the melt tension (MT (g)) and the melt flow rate (MFR (g/10 min)) satisfy a specific relation. This branched polyolefin is excellent in moldability and mechanical strength.