摘要:
The present invention relating to prepegs has the following constitution to achieve the above object. That is, a prepreg, comprising long reinforcing fibers [A], matrix resin [B] and a knitted fabric made from thermoplastic resin fibers [C], with the component [C] distributed near either or both of the surface layers. Moreover, the present invention relating to processes for production of prepregs has either of the following constitution to achieve the above object. That is, a process for preparing a prepreg, comprising the steps of impregnating long reinforcing fibers [A] with matrix resin [B], and bonding a knitted fabric made from thermoplastic resin fibers [C] onto one side or both sides of the intermediate product, or a process for preparing a prepreg, comprising the step of bonding matrix resin [B] formed as a film, a knitted fabric made from thermoplastic resin fibers [C] and long reinforcing fibers [A]. The prepregs of the present invention, therefore, are tacky and drapable, and the composite materials obtained by heating and forming the prepregs are high in heat resistance, and very high in impact resistance and inter-layer toughness. Furthermore, the prepregs are easy to produce and high in their latitude in availability of materials, this being industrially significant.
摘要:
Prepregs, comprising the following components [A], [B] and [C], with the component [C] distributed near either or both of the surface layers without being regularly arranged.[A]: Long reinforcing fibers[B]: A matrix resin[C]: Long thermoplastic resin fibersThe prepregs of the present invention are tacky and drapable, and the composite materials obtained by heating and forming the prepregs are high in heat resistance, and very high in impact resistance and inter-layer toughness. Furthermore, the prepregs are easy to produce and high in their latitude in availability of materials.
摘要:
An embodiment of the invention relates to an epoxy resin composition for fiber reinforced composite material having an epoxy resin that is liquid at room temperature (component 1), aromatic polyamine that is liquid at room temperature (component 2) and diaminodiphenylsulfone (component 3). The proportion of component (1) relative to the entire epoxy resin in the composition is 60-100 wt %. The sum of the proportions of components (2) and (3) relative to the entire polyamine in the composition is 70-100 wt %. The proportion of component (3) relative to the entire polyamine in the composition is 25-60 wt %. The stoichiometric ratio of the entire polyamine to the entire epoxy resin in the composition is 0.7-1.3. Additional embodiments of the invention relate to other aspects of the invention.
摘要:
The invention provides a resin composition for a fiber reinforced composite which can be used to produce a prepreg excellent in tackiness, drapability and windability around a mandrel, and also provides a prepreg in which reinforcing fibers are impregnated with a resin composition, and a fiber reinforced composite obtained from them. The resin composition includes a thermosetting resin and a thermoplastic resin with a weight average molecular weight of 200,000 to 5,000,000.
摘要:
A liquid aliphatic polyamine material, sealed in a container, has an ammonia concentration of at most about 100 ppm, and can be made by removing volatile odor forming components from a liquid comprised of aliphatic polyamine, and enclosing it in an air-tight container, with substantially no oxygen present, whereby the odor of the liquid aliphatic polyamine is reduced to a very low level even after extended storage.
摘要:
A thermosetting resin composition for carbon fiber reinforced composite materials of the present invention chiefly comprises (A)2 thermosetting resin such as epoxy resin and a curing agent, and (B)2 compound containing one functional group which can react with thermosetting resin (A) or its curing agent, and a moiety selected from the following formulae (1) to (4) Furthermore, the present invention also relates to a prepreg formed by impregnating reinforcing fiber with the aforesaid resin composition and to carbon fiber reinforced composite materials comprising reinforcing fiber and a cured aforesaid thermosetting resin composition.
摘要:
An epoxy resin composition having a low viscosity around a room temperature and excellent reinforcing fiber impregnating properties provides a composite material having excellent heat resistance and mechanical properties including compressive strength. The epoxy resin composition includes an aromatic epoxy resin having at least di-functionality, an aromatic amine compound and/or an alicyclic amine compound, wherein 5 minutes after the main agent comprising the epoxy resin and the curing agent comprising the aromatic amine compound and/or the alicyclic amine compound are mixed, the composition shows a viscosity at 25° C. in the range of from 1 to 1500 mPa sec, and Tc, tc, and Tg satisfy the following equation (1): Tg≧Tc+20−k×(Tc−90) (1), wherein k=0 when 60≦Tc
摘要:
An embodiment of the invention relates to an epoxy resin composition for fiber reinforced composite material having an epoxy resin that is liquid at room temperature (component 1), aromatic polyamine that is liquid at room temperature (component 2) and diaminodiphenylsulfone (component 3). The proportion of component (1) relative to the entire epoxy resin in the composition is 60-100 wt %. The sum of the proportions of components (2) and (3) relative to the entire polyamine in the composition is 70-100 wt %. The proportion of component (3) relative to the entire polyamine in the composition is 25-60 wt %. The stoichiometric ratio of the entire polyamine to the entire epoxy resin in the composition is 0.7-1.3. Additional embodiments of the invention relate to other aspects of the invention.
摘要:
The invention provides epoxy resin composition containing, as epoxy resin, the following epoxy resin (a) and epoxy resin (b), solid rubber at a ratio of 1 to 20 parts by weight to 100 parts by weight of the entire epoxy resins, and an aromatic amine as a curing agent and having a glass transition temperature of 160 to 220° C. in form of a cured material after heat curing at 180° C. for 2 hours: (a) an epoxy resin having oxazolidone rings and (b) a glycidylamine type epoxy resin.
摘要:
An epoxy resin composition comprises (a) an epoxy resin, (b) an anionic polymerization initiator and (c) from 1 to 30 parts by weight per 100 parts by weight of epoxy resin (a) of an aromatic ring-containing proton donor of a polyhydric alcohol and/or a polymercaptan.