Epoxy resin composition, prepreg, and fiber-reinforced composite material

Patent metadata

Field	Value
Publication number	US-2016130431-A1
Application number	US-201414897393-A
Country	US
Kind code	A1
Filing date	Jul 24, 2014
Priority date	Jul 26, 2013
Publication date	May 12, 2016
Grant date	—

Abstract

An epoxy resin composition comprising the following constituents [A], [B], and [C]:
[A] an epoxy resin having a structure represented by a formula (1);

in which a ring Z represents a condensed polycyclic aromatic hydrocarbon ring, R 1 and R 2 represent a substituent, R 3 represents a hydrogen atom or a methyl group, k is an integer of 0 to 4, m is an integer of 0 or more, and n is an integer of 1 or more;
[B] at least one resin selected from the group consisting of the following [Bx], [By] and [Bz]; [Bx] a bisphenol type epoxy resin; [By] an amine type epoxy resin; and [Bz] a thermoplastic resin; [C] a polyamine curing agent. Provided is an epoxy resin composition which provides a cured product having excellent heat resistance, toughness and elastic modulus.

First claim

1 . An epoxy resin composition comprising the following constituents [A], [B], and [C]:
[A] an epoxy resin having a structure represented by a formula (1);

in which a ring Z represents a condensed polycyclic aromatic hydrocarbon ring, R I and R 2 represent a substituent, R 3 represents a hydrogen atom or a methyl group, k is an integer of 0 to 4, m is an integer of 0 or more, and n is an integer of 1 or more;
[B] at least one resin selected from the group consisting of the following [Bx], [By] and [Bz];
[Bx] a bisphenol type epoxy resin;
[By] an amine type epoxy resin; and
[Bz] a thermoplastic resin;
[C] a polyamine curing agent.

2 . The epoxy resin composition according to claim 1 , comprising the constituents [A], [Bx], and [C], wherein in 100 parts by mass of the total amount of epoxy resins, the constituent [A] is contained in an amount of 10 to 70 parts by mass and the constituent [Bx] is contained in an amount of 20 to 80 parts by mass.

3 . The epoxy resin composition according to claim 2 , further comprising the thermoplastic resin [Bz] in an amount of 2 to 30 parts by mass with respect to 100 parts by mass of the total amount of epoxy resins.

4 . The epoxy resin composition according to claim 2 [[or 3]], further comprising the amine type epoxy resin [By] in an amount of 10 to 50 parts by mass in 100 parts by mass of the total amount of epoxy resins.

5 . The epoxy resin composition according to claim 1 , comprising the constituents [A], [By], and [C].

6 . The epoxy resin composition according to claim 5 , comprising the constituent [A] in an amount of 10 to 50 parts by mass and the constituent [By] in an amount of 10 to 50 parts by mass in 100 parts by mass of the total amount of epoxy resins.

7 . The epoxy resin composition according to claim 5 , further comprising the thermoplastic resin [Bz] in an amount of 2 to 30 parts by mass with respect to 100 parts by mass of the total amount of epoxy resins.

8 . The epoxy resin composition according to claim 5 , further comprising the bisphenol type epoxy resin [Bx] in an amount of 20 to 50 parts by mass in 100 parts by mass of the total amount of epoxy resins.

9 . The epoxy resin composition according to claim 1 , comprising the constituents [A], [Bz], and [C], wherein a glass transition temperature (Tg) of the thermoplastic resin [Bz] is 150° C. or higher.

10 . The epoxy resin composition according to claim 1 , further comprising the elastomer [D] in an amount of 2 to 15 parts by mass with respect to 100 parts by mass of the total amount of epoxy resins.

11 . The epoxy resin composition according to claim 1 , wherein its complex viscosity at 80° C. is 0.1 to 200 Pa·s.

12 . A prepreg formed by impregnating reinforcing fibers with the epoxy resin composition according to claim 1 .

13 . The prepreg according to claim 12 , wherein the reinforcing fibers are carbon fibers.

14 . A fiber-reinforced composite material containing reinforcing fibers and a cured product of an epoxy resin composition, wherein the epoxy resin composition is the epoxy resin composition according to claim 1 .

Assignees

• Toray Industries

Inventors

• Nagano Maki
• Fuse Ayako
• Tomioka Nobuyuki

Classifications

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08L63/00 Primary

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

• C08J5/243

  using carbon fibres · CPC title

• C08J2453/00

  Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers · CPC title

• C08J2400/26

  Elastomers · CPC title