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:
Dec. 20, 2011
Filed:
May. 16, 2008
Masaaki Ito, Yokkaichi, JP;
Hideshi Uchino, Yokkaichi, JP;
Yoshiyuki Ishihama, Kawasaki, JP;
Masaru Aoki, Yokkaichi, JP;
Masato Nakano, Yokkaichi, JP;
Fusaaki Katou, Yokkaichi, JP;
Kazuo Asuka, Yokkaichi, JP;
Masaaki Ito, Yokkaichi, JP;
Hideshi Uchino, Yokkaichi, JP;
Yoshiyuki Ishihama, Kawasaki, JP;
Masaru Aoki, Yokkaichi, JP;
Masato Nakano, Yokkaichi, JP;
Fusaaki Katou, Yokkaichi, JP;
Kazuo Asuka, Yokkaichi, JP;
Japan Polypropylene Corporation, Tokyo, JP;
Abstract
A propylene-based polymer which is suitably applicable to foam molding, sheet molding, blow molding or the like, because of having good flow characteristics, high melt tension, high swell ratio and thus good molding workability. It is attained by a propylene-based polymer or the like characterized by satisfying the following requirements (i) to (vi). Requirement (i): MFR is 0.1 g/10 minutes to 100 g/10 minutes. Requirement (ii): Q value by GPC is 3.5 to 10.5. Requirement (iii): ratio of components with a molecular weight of equal to or higher than 2,000,000, in a molecular weight distribution curve obtained by GPC, is equal to or larger than 0.4% by weight and less than 10% by weight. Requirement (iv): components, which elute at a temperature of equal to or lower than 40° C., are equal to or less than 3.0% by weight, in temperature rising elution fractionation by ODCB. Requirement (v): isotactic triad fraction (mm) measured withC-NMR is equal to or higher than 95%. Requirement (vi): strain hardening degree (λmax), in measurement of extensional viscosity, is equal to or higher than 6.0.