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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 9139706 B1

PDFFull Text
Date of Patent:
Sep. 22, 2015

Filed:

Mar. 29, 2011

Prepreg, fiber-reinforced composite material, and method for producing prepreg

Applicants:

Takayuki Fujiwara, Ehime, JP;

Jun Misumi, Ehime, JP;

Ayumi Matsuda, Ehime, JP;

Kenichi Yoshioka, Ehime, JP;

Inventors:

Takayuki Fujiwara, Ehime, JP;

Jun Misumi, Ehime, JP;

Ayumi Matsuda, Ehime, JP;

Kenichi Yoshioka, Ehime, JP;

Assignee:

TORAY INDUSTRIES, INC., Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Tahseen N Khan

Int. Cl.
CPC ...
B32B 7/02 (2006.01); B32B 38/08 (2006.01); B32B 37/18 (2006.01); C08J 5/24 (2006.01); C08G 59/40 (2006.01); C08G 59/42 (2006.01); C08G 59/50 (2006.01); C08L 63/00 (2006.01); B32B 5/26 (2006.01); B32B 5/28 (2006.01); C08K 7/02 (2006.01);
U.S. Cl.
CPC ...
C08J 5/24 (2013.01); B32B 5/26 (2013.01); B32B 5/28 (2013.01); C08G 59/4021 (2013.01); C08G 59/4215 (2013.01); C08G 59/5033 (2013.01); C08L 63/00 (2013.01); B32B 2250/05 (2013.01); B32B 2250/20 (2013.01); B32B 2260/023 (2013.01); B32B 2260/046 (2013.01); B32B 2262/106 (2013.01); B32B 2264/0292 (2013.01); B32B 2307/54 (2013.01); B32B 2307/56 (2013.01); B32B 2307/718 (2013.01); C08J 2363/00 (2013.01); C08J 2475/04 (2013.01); C08K 7/02 (2013.01); Y10T 156/10 (2015.01); Y10T 428/2495 (2015.01);
Abstract

A prepreg containing components (A) to (C) defined below, wherein component (A) is placed on one surface or both surfaces of a layer comprising components (B) and (C), 90% or more by area of component (A) being present in a region(s) extending from the surface(s) of the resulting prepreg containing components (A) to (C) to a depth equal to 20% of the average thickness of the prepreg: (A) urethane particles having tan δ of 0.15 or more at 10° C. and having a three-dimensional cross-linked structure, (B) a first epoxy resin composition, and (C) reinforcing fiber. The present invention provides a fiber-reinforced composite material which excels in rigidity, strength, and vibration damping properties, and a prepreg which is suitably used for production thereof, and also provides methods for production thereof.

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