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:
Oct. 20, 2026
Filed:
Feb. 10, 2022
Toray Industries, Inc., Tokyo, JP;
Kazunori Hondo, Nagoya, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
Provided is an epoxy resin composition and a fiber-reinforced composite material using the epoxy resin composition, where the epoxy resin composition is capable of maintaining a low viscosity while being injected into a reinforcing fiber substrate and is also capable of imparting to a fiber-reinforced composite material high-level physical properties required for use as a structural material even in cases where the temperature increase rate during thermal curing is low, where the epoxy resin composition contains [A] tetraglycidyl diaminodiphenylmethanein an amount of not less than 70% by mass and not more than 90% by mass of total epoxy resin components taken as 100% by mass, [B] a bisphenol F-type epoxy resin in an amount of not less than 10% by mass and not more than 30% by mass by mass of total epoxy resin components taken as 100% by mass, [C] 4,4'-methylenebis(3-chloro-2,6-diethylaniline), and [D] 4,4′-methylenebis(3,3′,5,5′-tetraisopropylaniline).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile