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:
Apr. 14, 2020
Filed:
Dec. 20, 2016
Sumitomo Chemical Company, Limited, Tokyo, JP;
Yu Higuchi, Ichihara, JP;
Takeshi Maruyama, Ichihara, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
A propylene-based polymer composition having good thermal stability and yielding a molded product have a favorable appearance is provided. The composition contains a propylene-based polymer (A) selected from a propylene homopolymer (A-1) and a heterophasic propylene-based polymer (A-2), carbon black (D), and optionally ethylene-α-olefin copolymer (B). The content of (D) is 0.001 to 1.7 parts by weight with respect to 100 parts by weight of (A). The primary particle size of the carbon black is 15 nm to 39 nm, and x defined by the following formula (1) is 1 to 430.  (1)In formula (1), a is the concentration (unit: atom %) of oxygen double-bonded to carbon on the surface of the carbon black, and S is the nitrogen adsorption specific surface area (unit: m/g) of the carbon black.