Epoxy resin composition, prepreg, and fiber reinforced material

Patent metadata

Field	Value
Publication number	US-10316159-B2
Application number	US-201615760485-A
Country	US
Kind code	B2
Filing date	Jul 20, 2016
Priority date	Sep 17, 2015
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

An epoxy resin composition includes: an [A] epoxy resin at least comprising an [A1] isocyanurate epoxy resin and an [A2] glycidyl amine epoxy resin; [B] dicyandiamide; and [C] diaminodiphenyl sulfone, wherein (1) an average epoxy equivalent of the [A] epoxy resin is 115 g/eq to 150 g/eq, and (2) an amount of the component [C] added is an amount of 0.05 equivalent to 0.3 equivalent relative to epoxy groups in the [A] epoxy resin in terms of active hydrogen groups.

First claim

The invention claimed is:

1. An epoxy resin composition comprising:
[A] an epoxy resin component comprising at least [A1] an isocyanurate epoxy resin and [A2] one or more glycidyl amine epoxy resins other than an isocyanurate epoxy resin;
[B] dicyandiamide; and
[C] diaminodiphenyl sulfone, wherein:
(1) [A] has an average epoxy equivalent of 115 g/eq to 150 g/eq;
(2) [C] is present in an amount of 0.05 equivalent to 0.3 equivalent relative to epoxy groups in [A], in terms of active hydrogen groups;
(3) [A1] is present in an amount of 20 parts by mass to 40 parts by mass per 100 parts by mass of [A];
(4) [A2] is present in an amount of 10 parts by mass to 50 parts by mass per 100 parts by mass of [A]; and
(5) [A1] and [A2] are present in a total amount of 40 parts by mass to 90 parts by mass per 100 parts by mass of [A].

2. The epoxy resin composition according to claim 1 , wherein [A2] is one or more glycidyl amine epoxy resins having at least a tri-functionality, other than an isocyanurate epoxy resin.

3. The epoxy resin composition according to claim 1 , wherein [A] further comprises 20 parts by mass to 60 parts by mass per 100 parts by mass of [A] of [A3] a bisphenol epoxy resin.

4. The epoxy resin composition according to claim 3 , wherein [A3] is a bisphenol F epoxy resin.

5. The epoxy resin composition according to claim 1 , further comprising [D] an accelerator.

6. The epoxy resin composition according to claim 5 , wherein [D] is a urea compound.

7. The epoxy resin composition according to claim 1 , further comprising [E] a thermoplastic resin.

8. The epoxy resin composition according to claim 7 , wherein [E] is a polyethersulfone resin.

9. The epoxy resin composition of claim 1 , wherein [A2] is selected from the group consisting of diaminodiphenylmethane epoxy resins, aminophenol epoxy resins, diaminodiphenyl sulfone epoxy resins, and combinations thereof.

10. A prepreg formed by impregnating the epoxy resin composition according to claim 1 into reinforcement fibers.

11. The prepreg according to claim 10 , wherein the reinforcement fibers are carbon fibers.

12. A fiber reinforced material formed by curing the prepreg according to claim 10 .

13. An epoxy resin composition comprising:
[A] an epoxy resin component comprising at least [A1] an isocyanurate epoxy resin, [A2] one or more glycidyl amine epoxy resins other than an isocyanurate epoxy resin, and [A3] a bisphenol epoxy resin, wherein [A3] is present in an amount of 20 parts by mass to 60 parts by mass per 100 parts by mass of [A];
[B] dicyandiamide; and
[C] diaminodiphenyl sulfone, wherein:
(1) [A] has an average epoxy equivalent of 115 g/eq to 150 g/eq; and
(2) [C] is present in an amount of 0.05 equivalent to 0.3 equivalent relative to epoxy groups in [A], in terms of active hydrogen groups.

14. The epoxy resin composition according to claim 13 , wherein [A3] is a bisphenol F epoxy resin.

Assignees

• Toray Industries

Inventors

• Takaiwa Reo
• Kawasaki Junko
• Sano Kentaro
• Hirano Noriyuki

Classifications

• B32B27/38

  comprising epoxy resins · CPC title

• C08L63/06

  Triglycidylisocyanurates · CPC title

• C08G59/3245

  containing only nitrogen as a heteroatom · CPC title

• C08L63/00

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• B32B2260/021

  Fibrous or filamentary layer · CPC title