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:
Jun. 20, 2017
Filed:
Jul. 16, 2013
Toray Industries, Inc., Tokyo, JP;
Nobuyuki Arai, Iyo-gun, JP;
Tomoko Ichikawa, Iyo-gun, JP;
Hiroshi Taiko, Iyo-gun, JP;
Makoto Endo, Iyo-gun, JP;
Masanobu Kobayashi, Iyo-gun, JP;
Jun Misumi, Iyo-gun, JP;
TORAY INDUSTRIES, INC., Tokyo, JP;
Abstract
A prepreg is formed by impregnating sizing agent-coated carbon fibers coated with a sizing agent with a thermosetting resin composition. The sizing agent contains an aliphatic epoxy compound (A) and an aromatic compound (B) at least containing an aromatic epoxy compound (B1). The sizing agent-coated carbon fibers has an (a)/(b) ratio of 0.50 to 0.90 where (a) is a height (cps) of a component at a binding energy (284.6 eV) assigned to CHx, C—C, and C═C and (b) is a height (cps) of a component at a binding energy (286.1 eV) assigned to C—O in a Ccore spectrum of a surface of the sizing agent applied onto the carbon fibers analyzed by X-ray photoelectron spectroscopy using AlKαas an X-ray source at a photoelectron takeoff angle of 15°.