Two-pack epoxy resin composition for fiber-reinforced composite materials, and fiber-reinforced composite material

Patent metadata

Field	Value
Publication number	US-2016237273-A1
Application number	US-201415025932-A
Country	US
Kind code	A1
Filing date	Sep 19, 2014
Priority date	Sep 30, 2013
Publication date	Aug 18, 2016
Grant date	—

Abstract

A two-pack epoxy resin composition for a fiber-reinforced composite material, which composition includes the following components [A] to [D], and in which the mass compounding ratio of component [A] and component [B] is 5:95-50:50, there is provided a fiber-reinforced composite material which has exceptional workability during resin preparation, exceptional stability of viscosity of the resin composition at low temperatures, and exceptional impregnation properties such that low viscosity is maintained during injection into reinforcing fibers, and which cures with a short time during molding, and has high dimensional stability and exceptional heat resistance.

First claim

1 - 12 . (canceled)

13 . A two-pack epoxy resin composition for fiber-reinforced composite materials comprising components [A] to [D] as specified below, a ratio by mass of component [A] to component [B] being 5:95 to 50:50:
[A] an epoxy resin having an epoxy equivalent of 250 or less and a hydroxyl equivalent of 500 or less; [B] an epoxy resin other than component [A]; [C] an acid anhydride; and [D] an organic phosphorous compound or an imidazole derivative.

14 . The two-pack epoxy resin composition according to claim 13 , wherein the epoxy resin of component [A] has two or more epoxy groups.

15 . The two-pack epoxy resin composition according to claim 13 , wherein component [A] is an aliphatic glycidyl ether derived from a polyol.

16 . The two-pack epoxy resin composition according to claim 13 , wherein component [A] is an epoxy resin selected from the group consisting of glycerol-type epoxy resins, trimethylolpropane-type epoxy resins, and sorbitol-type epoxy resins.

17 . The two-pack epoxy resin composition according to claim 13 , wherein component [B] is a bisphenol-type epoxy resin.

18 . The two-pack epoxy resin composition according to claim 13 , wherein component [C] is an acid anhydride having an alicyclic structure.

19 . The two-pack epoxy resin composition according to claim 13 , wherein the amount of hydroxyl groups in the epoxy resin composition, which is expressed in moles per kilogram of the epoxy resin composition, is 0.1 mol/kg or larger and 1.0 mol/kg or smaller.

20 . The two-pack epoxy resin composition according to claim 13 , having a specific temperature T at which N×t90≦12 holds, where N is a ratio of viscosity of the resin composition after 20 minutes of keeping at 40° C. from when all the components are mixed to viscosity of the resin composition at 40° C. immediately after the mixing of all the components, and t90 (unit: minute) is a length of time that a cure index, as obtained in a dielectric measurement performed while maintaining a constant temperature T of the resin composition, takes to reach 90%.

21 . The two-pack epoxy resin composition according to claim 13 , having a viscosity at 25° C. of 0.1 to 2.5 Pa·s.

22 . The two-pack epoxy resin composition according to claim 13 , obtained by mixing a base resin pack containing components [A] and [B] with a curing agent pack containing components [C] and [D].

23 . A fiber-reinforced composite material produced by combining the two-pack epoxy resin composition recited in claim 13 with reinforcing fibers and allowing the two-pack epoxy resin composition to cure.

24 . The fiber-reinforced composite material according to claim 23 , wherein the reinforcing fibers are carbon fibers.

25 . The two-pack epoxy resin composition according to claim 14 , wherein component [A] is an aliphatic glycidyl ether derived from a polyol.

26 . The two-pack epoxy resin composition according to claim 14 , wherein component [A] is an epoxy resin selected from the group consisting of glycerol-type epoxy resins, trimethylolpropane-type epoxy resins, and sorbitol-type epoxy resins.

27 . The two-pack epoxy resin composition according to claim 14 , wherein component [B] is a bisphenol-type epoxy resin.

28 . The two-pack epoxy resin composition according to claim 15 , wherein component [B] is a bisphenol-type epoxy resin.

29 . The two-pack epoxy resin composition according to claim 16 , wherein component [B] is a bisphenol-type epoxy resin.

30 . The two-pack epoxy resin composition according to claim 14 , wherein component [C] is an acid anhydride having an alicyclic structure.

31 . The two-pack epoxy resin composition according to claim 15 , wherein component [C] is an acid anhydride having an alicyclic structure.

32 . The two-pack epoxy resin composition according to claim 16 , wherein component [C] is an acid anhydride having an alicyclic structure.

Assignees

• Toray Industries

Inventors

• Oka Hideki
• Tomioka Nobuyuki
• Honda Shiro

Classifications

• C08G59/4284

  together with other curing agents · CPC title

• C08L63/00 Primary

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

• C08J5/042

  with carbon fibres · CPC title

• C08J2363/00

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

• C08G59/688

  containing phosphorus · CPC title