Prepreg, fibre-reinforced composite material, and particle-containing resin composition

Patent metadata

Field	Value
Publication number	US-2016289403-A1
Application number	US-201415037415-A
Country	US
Kind code	A1
Filing date	Oct 28, 2014
Priority date	Nov 19, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

The prepreg comprises: a reinforcing fiber layer including reinforcing fibers and a resin composition with which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and a surface layer provided on a surface of the reinforcing fiber layer and containing (A) a benzoxazine resin, (B) an epoxy resin, (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule, and (D) polyamide resin particles having an average particle size of 5 to 50 μm, wherein the polyamide resin particles include a polyamide resin particle made of a copolymer in which caprolactam and laurolactam are copolymerized at a molar ratio of 1:9 to 3:7 and a polyamide 1010 resin particle.

First claim

1 . A prepreg comprising:
a reinforcing fiber layer including reinforcing fibers and a resin composition with which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and a surface layer provided on at least one surface of the reinforcing fiber layer and containing (A) a benzoxazine resin, (B) an epoxy resin, (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule, and (D) polyamide resin particles having an average particle size of 5 to 50 μm, wherein the polyamide resin particles include a polyamide resin particle made of a copolymer in which caprolactam and laurolactam are copolymerized at a molar ratio of 1:9 to 3:7 and a polyamide 1010 resin particle.

2 . The prepreg according to claim 1 , wherein the surface layer contains 65 to 78 parts by mass of the (A) component, 22 to 35 parts by mass of the (B) component, 5 to 20 parts by mass of the (C) component, and 15 to 45 parts by mass of the (D) component when it is assumed that the total amount of the (A) component and the (B) component is 100 parts by mass.

3 . A fiber-reinforced composite material obtained by stacking the prepreg according to claim 1 plurally and performing heating under increased pressure.

4 . A resin composition containing particles comprising:
(A) a benzoxazine resin; (B) an epoxy resin; (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and (D) polyamide resin particles having an average particle size of 5 to 50 μm, wherein the polyamide resin particles include a polyamide resin particle made of a copolymer in which caprolactam and laurolactam are copolymerized at a molar ratio of 1:9 to 3:7 and a polyamide 1010 resin particle.

5 . A fiber-reinforced composite material obtained by stacking the prepreg according to claim 2 plurally and performing heating under increased pressure.

Assignees

• Jx Nippon Oil & Energy Corp
• Fuji Heavy Ind Ltd

Inventors

• Minami Masaki
• Matsumoto Takayuki
• Fukuda Yoshihiro
• Sekine Naoyuki
• Nakajima Masanori

Classifications

• B32B5/30

  one layer {being formed of particles, e.g. chips,} granules, powder · CPC title

• C08L61/34

  Condensation polymers of aldehydes or ketones with monomers covered by at least two of the groups C08L61/04, C08L61/18 and C08L61/20 · CPC title

• C08J2379/04

  Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors · CPC title

• C08J2477/06

  Polyamides derived from polyamines and polycarboxylic acids (C08J2477/10 takes precedence) · CPC title

• C08L77/02

  Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08L77/10 takes precedence) · CPC title