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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 12240975 B1

PDFFull Text
Date of Patent:
Mar. 04, 2025

Filed:

Apr. 01, 2020

Epoxy resin composition, intermediate substrate, and fiber-reinforced composite material

Applicant:

Toray Industries, Inc., Tokyo, JP;

Inventors:

Daisuke Konishi, Ehime, JP;

Yuichi Yamakita, Ehime, JP;

Hideki Hanabusa, Ehime, JP;

Noriyuki Hirano, Ehime, JP;

Masahiro Tsuzuki, Ehime, JP;

Assignee:

Toray Industries, Inc., Tokyo, JP;

Attorney:

Buchanan Ingersoll & Rooney PC

Primary Examiner:

Patrick D Niland

Int. Cl.
CPC ...
C08L 63/00 (2006.01); C08G 59/22 (2006.01); C08G 59/40 (2006.01); C08G 59/42 (2006.01); C08G 59/50 (2006.01); C08G 59/68 (2006.01); C08G 59/72 (2006.01); C08J 5/04 (2006.01); C08J 5/10 (2006.01); C08J 5/24 (2006.01);
U.S. Cl.
CPC ...
C08L 63/00 (2013.01); C08G 59/22 (2013.01); C08G 59/4021 (2013.01); C08G 59/4078 (2013.01); C08G 59/4253 (2013.01); C08G 59/50 (2013.01); C08G 59/68 (2013.01); C08G 59/72 (2013.01); C08J 5/04 (2013.01); C08J 5/10 (2013.01); C08J 5/249 (2021.05); C08J 2363/00 (2013.01); C08J 2451/04 (2013.01); C08L 2205/035 (2013.01); C08L 2207/53 (2013.01);
Abstract

The purpose of the present invention is to provide an epoxy resin composition which exhibits a high level of deforming capacity and fracture toughness and from which a resin cured product maintaining heat resistance can be obtained. The epoxy resin composition according to the present invention satisfies condition 1 or condition 2 below, wherein the resin cured product obtained by reacting the epoxy resin composition at 150° C. for 60 minutes has a tensile elongation at break of 7% or more. Condition 1: including all the following components [A], [B], and [C], component [A]: a bifunctional aliphatic epoxy resin having a specific structure, component [B]: a terminal carboxy-modified acrylic rubber, and component [C]: a dicyandiamide. Condition 2: including the following components [D], [E], and [F] and satisfying conditions [a] and [b] below, component [D]: core-shell type rubber particles, component [E]: a boric ester compound, component [F]: a curing agent, condition [a]: including 9-18 parts by mass of component [D] with respect to 100 parts by mass of the total epoxy resin, and condition [b]: 0.003≤(the content of component [E]/the content of component [D])≤0.05.

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