Epoxy resin composition and fiber reinforced composite material

Patent metadata

Field	Value
Publication number	US-10253142-B2
Application number	US-201515519983-A
Country	US
Kind code	B2
Filing date	Sep 30, 2015
Priority date	Oct 21, 2014
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

An epoxy resin composition is provided including at least the following component [A], component [B], and component [C] or [D] wherein cured product obtained by curing the epoxy resin composition has a rubbery state modulus in dynamic viscoelasticity evaluation of 10 MPa or less, and the cured product has a glass transition temperature of at least 95° C.;
[A] an aromatic epoxy resin having a functionality of at least 3, [B] an aromatic diamine having a substituent at ortho position of each amino group or a cycloalkyldiamine wherein the carbon atom adjacent to the carbon atom bonded to each amino group has a substituent, [C] an aliphatic polyamine having an alkylene glycol structure, [D] a straight chain or branched aliphatic polyamine containing 6 to 12 carbon atoms.

First claim

The invention claimed is:

1. An epoxy resin composition comprising at least components [A] and [B] and component [C] or [D] wherein cured product obtained by curing the epoxy resin composition has a rubbery state modulus in dynamic viscoelasticity evaluation of 10 MPa or less, and the cured product has a glass transition temperature of at least 95° C.;
[A] an aromatic epoxy resin having a functionality of at least 3,
[B] an aromatic diamine having a substituent at ortho position of each amino group or a cycloalkyldiamine wherein the carbon atom adjacent to the carbon atom bonded to each amino group has a substituent,
[C] an aliphatic polyamine having an alkylene glycol structure,
[D] a straight chain or branched aliphatic polyamine containing 6 to 12 carbon atoms;
wherein component [B] and component [C] or [D] are present in a blend ratio in a range of 2:3 to 7:1.

2. An epoxy resin composition according to claim 1 wherein the component [B] is said aromatic diamine.

3. An epoxy resin composition according to claim 1 wherein the component [B] is said cycloalkyldiamine.

4. An epoxy resin composition according to claim 1 wherein the composition contains the component [C], and the component [C] is an aliphatic polyamine having 2-aminopropyl ether structure.

5. An epoxy resin composition according to claim 1 wherein the composition contains the component [C], and the component [C] is an aliphatic polyamine having 2-aminoethyl ether structure.

6. An epoxy resin composition according to claim 1 wherein the composition contains the component [C], and the component [C] is an aliphatic polyamine having aminopropyl ether structure.

7. An epoxy resin composition according to claim 1 wherein the composition further comprises a component [E] an optionally substituted diglycidylaniline.

8. An epoxy resin composition according to claim 1 wherein viscosity at 25° C. is 2000 mPa·s or less.

9. An epoxy resin composition according to claim 1 wherein the viscosity at 30° C. and after 30 minutes is up to 2 times of an original viscosity obtained 1 minute after introducing the epoxy resin composition in a viscometer being used to measure viscosity adjusted to 30° C.

10. A fiber reinforced composite material comprising a cured product of the epoxy resin composition according to claim 1 and a reinforcing fiber.

11. A molded article comprising the fiber reinforced composite material according to claim 10 .

12. A pressure vessel comprising the fiber reinforced composite material according to claim 10 .

Assignees

• Toray Industries

Inventors

• Matsuda Ayumi
• Miyoshi Masayuki
• Hirano Noriyuki

Classifications

• C08G59/5033

  aromatic · CPC title

• C08G59/5026

  cycloaliphatic · CPC title

• C08G59/5013

  containing more than seven carbon atoms, e.g. fatty amines · CPC title

• C08G59/50

  Amines · CPC title

• C08G59/32 Primary

  Epoxy compounds containing three or more epoxy groups · CPC title