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:
Sep. 03, 2019
Filed:
Jul. 10, 2014
Toray Industries, Inc., Tokyo, JP;
Shizue Ueno, Iyo-gun, JP;
Nobuyuki Arai, Iyo-gun, JP;
Jun Misumi, Iyo-gun, JP;
Hiroshi Taiko, Otsu, JP;
TORAY INDUSTRIES, INC., Tokyo, JP;
Abstract
An epoxy resin composition including [A1] a hardener represented by Formula (1), and [B] an aromatic epoxy resin having tri- or higher functionality, wherein a carbon nuclear relaxation time Tcorresponding to a benzene ring carbon atom in the main backbone of Formula (1) assigned to 130 ppm in a solid-stateC-NMR spectrum is 42 seconds or longer, and a prepreg and a carbon fiber-reinforced composite material obtained using the epoxy resin composition: Provided are an epoxy resin composition that provides a carbon fiber-reinforced composite material excellent in tensile strength and compression strength and suitable as a structural material, a prepreg, and a carbon fiber-reinforced composite material.