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:
May. 05, 2015
Filed:
May. 17, 2012
Masahiko Okamoto, Chiba, JP;
Mayumi Yasuda, Ichihara, JP;
Tetsuji Kasai, Shunan, JP;
Kazuyoshi Kaneko, Ichihara, JP;
Kyoko Kobayashi, Chiba, JP;
Kotaro Ichino, Ichihara, JP;
Masahiko Okamoto, Chiba, JP;
Mayumi Yasuda, Ichihara, JP;
Tetsuji Kasai, Shunan, JP;
Kazuyoshi Kaneko, Ichihara, JP;
Kyoko Kobayashi, Chiba, JP;
Kotaro Ichino, Ichihara, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
To provide a propylene-based copolymer and a propylene-based copolymer composition, each of which has a high melt tension because it has a long-chain branched structure, exhibits excellent molding processability during molding, such as inflation molding, extrusion molding, blow molding, injection molding or vacuum forming, and is capable of favorably providing a foamed product having an excellent expansion ratio and excellent cell uniformity in the foaming stage. The propylene-based copolymer (A) of the present invention comprises 50 to 95% by mol of constituent units [i] derived from propylene, 4.9 to 49.9% by mol of constituent units [ii] derived from an α-olefin of 2 to 10 carbon atoms other than propylene and 0.1 to 10% by mol of constituent units [iii] derived from a non-conjugated polyene (with the proviso that the total amount of the constituent units [i], [ii] and [iii] is 100% by mol), and is characterized by satisfying specific requirements (a) and (c).