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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.:

US 9777127 B1

PDFFull Text
Date of Patent:
Oct. 03, 2017

Filed:

Sep. 04, 2013

Carbon fiber bundle for resin reinforcement purposes and method for producing same, and carbon-fiber-reinforced thermoplastic resin composition and molded product thereof

Applicant:

Mitsubishi Rayon Co., Ltd., Chiyoda-ku, JP;

Inventors:

Tadashi Ohtani, Toyohashi, JP;

Akira Harada, Yokkaichi, JP;

Shoya Yoda, Yokohama, JP;

Atsushi Takahashi, Toyohashi, JP;

Assignee:

Mitsubishi Chemical Corporation, Chiyoda-ku, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Richard A Huhn

Int. Cl.
CPC ...
C08J 5/04 (2006.01); C08J 5/24 (2006.01); C08J 5/06 (2006.01); B29B 15/12 (2006.01); B29B 15/14 (2006.01); C08K 3/04 (2006.01); C08L 33/02 (2006.01); C08L 23/26 (2006.01); B29K 23/00 (2006.01); B29K 307/04 (2006.01);
U.S. Cl.
CPC ...
C08J 5/042 (2013.01); B29B 15/12 (2013.01); B29B 15/122 (2013.01); B29B 15/14 (2013.01); C08J 5/06 (2013.01); C08J 5/24 (2013.01); B29K 2023/12 (2013.01); B29K 2307/04 (2013.01); C08J 2323/12 (2013.01); C08J 2323/26 (2013.01); C08J 2323/36 (2013.01); C08K 3/046 (2017.05); C08L 23/26 (2013.01); C08L 33/02 (2013.01);
Abstract

The purpose of the present invention is to provide a carbon fiber bundle for resin reinforcement purposes, which is produced using a sizing agent that can exert satisfactory interface adhesiveness to both of a carbon fiber bundle and a thermoplastic resin in the production of a carbon-fiber-reinforced thermoplastic resin, and which has satisfactory emulsion stability. One embodiment of the present invention is a carbon fiber bundle for resin reinforcement purposes, which comprises a carbon fiber bundle and a polymer adhered onto the carbon fiber bundle, wherein the polymer is produced by binding an acid-modified polyolefin having a polyolefin structure and an acidic group in the molecular structure thereof to a hydrophilic polymer having a weight average molecular weight (Mw) of 450 or more, and wherein the ratio of the mass of the polyolefin structure to the mass of the acidic group in the acid-modified polyolefin is 100:0.1 to 100:10, the ratio of the mass of the acid-modified polyolefin to the mass of the hydrophilic polymer is 100:1 to 100:100, and the content of the polymer in the carbon fiber bundle for resin reinforcement purposes is 0.1 to 8.0 mass % inclusive.

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