Epoxy resin mixture, epoxy resin composition and cured product of same

Patent metadata

Field	Value
Publication number	US-12473428-B2
Application number	US-202117780995-A
Country	US
Kind code	B2
Filing date	Jan 20, 2021
Priority date	Jan 22, 2020
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

An epoxy resin mixture which contains an epoxy resin represented by Formula (1) below and an epoxy resin represented by Formula (2) below at a weight ratio of 1:5 to 1:0.2. (In Formula (1), plural R1's each exist independently and represent a hydrogen atom or a C1-10 alkyl group, n represent a real number of 1 to 10, and G represents a substituted or unsubstituted glycidyl group.) (In Formula (2), plural R2's and R3's each exist independently and represent a hydrogen atom or a C1-10 alkyl group, n represents a real number of 1 to 10, and G represents a substituted or unsubstituted glycidyl group.).

First claim

The invention claimed is:

1 . An epoxy resin mixture which contains an epoxy resin represented by Formula (1) below and an epoxy resin represented by Formula (2) below at a weight ratio of 1:5 to 1:0.2,

in Formula (1), plural R 1 's each exist independently and represent a hydrogen atom or a C1-10 alkyl group, n represents a real number of 1 to 10, and G represents a substituted or unsubstituted glycidyl group, and

in Formula (2), plural R 2 's and R 3 's each exist independently and represent a hydrogen atom or a C1-10 alkyl group, n represents a real number of 1 to 10, and G represents a substituted or unsubstituted glycidyl group,
wherein the epoxy resin mixture is obtained through a reaction between a phenolic resin represented by Formula (3) below, a phenolic resin represented by Formula (4) below, and an epihalohydrin,

in Formula (3), plural R 1 's each exist independently and represent a hydrogen atom or a C1-10 alkyl group, and n represents a real number of 1 to 10, a total content of a component represented by n=1 and a component represented by n=3 as measured by gel permeation chromatography is greater than or equal to 1% by area and less than 20% by area, a total content of a component represented by n=2 and a component represented by n=4 as measured by gel permeation chromatography is greater than or equal to 25% by area and less than 80% by area, and

in Formula (4), plural R 2 's and R 3 's each exist independently and represent a hydrogen atom or a C1-10 alkyl group, and n represents a real number of 1 to 10.

2 . An epoxy resin composition comprising:
the epoxy resin mixture according to claim 1 ; and a curing agent.

3 . The epoxy resin composition according to claim 2 ,
wherein the curing agent is an amine-based curing agent.

4 . The epoxy resin composition according to claim 2 , which is for a carbon fiber-reinforced composite material.

5 . A resin sheet obtained by coating a support substrate with the epoxy resin composition according to claim 2 .

6 . A prepreg obtained by impregnating the resin sheet according to claim 5 into carbon fibers.

7 . A carbon fiber-reinforced composite material obtained by curing the prepreg according to claim 6 .

8 . A prepreg obtained by impregnating the epoxy resin composition according to claim 2 into carbon fibers.

9 . A carbon fiber-reinforced composite material obtained by curing the prepreg according to claim 8 .

Assignees

• Nippon Kayaku Kk

Inventors

• Kawano Yusuke
• Nakanishi Masataka

Classifications

• C08J2363/00

  Characterised by the use of epoxy resins; Derivatives of epoxy resins · CPC title

• C08J5/042

  with carbon fibres · CPC title

• C08G59/50

  Amines · CPC title

• C08G59/063

  with epihalohydrins · CPC title

• C08J5/243 Primary

  using carbon fibres · CPC title