摘要:
Provided are a shape memory polymer composition, which comprises a bifunctional isocyanate and/or a trifunctional isocyanate, and a polyol having an average molecular weight of from 100 to 550, with a molar ratio in terms of functional groups of isocyanate:polyol=0.9 to 1.1:1.0; FRP having the shape memory polymer and a fibrous material; and a production process of the FRP comprising impregnating the fibrous material with, as a matrix resin, the shape memory polymer composition and curing. According to the present invention, the shape memory polymer composition has an extended pot life and FRP has excellent inflatability.
摘要:
A prepreg of FRP (fiber reinforced plastic) having with (i) a matrix resin composition containing a bifunctional isocyanate and/or a trifunctional isocyanate, a polyol and a bifunctional chain extender having two active hydrogen groups at a molar ratio, as a functional group, of isocyanate:polyol:chain extender=5.0 to 1.0:1.0:4.0 to 0, or containing a bifunctional isocyanate and/or a trifunctional isocyanate and a polyol at a molar ratio, as a functional group, of liquid isocyanate:polyol=0.9 to 1.1:1.0; and (ii) a fibrous material. A production process of the prepreg. According to the present invention, the prepreg has a sufficient pot life and permits convenient production of an FRP molding.
摘要:
There is provided a neutron shielding material which has heat resistance and has ensured neutron shielding performance even in a high-temperature environment during storage of a spent nuclear fuel for high burnup. A neutron shielding material having improved heat resistance and ensured neutron shielding performance due to the absence of an amine curing agent is provided by a neutron shielding material composition comprising a polymerization initiator, a polymerization component, a density increasing agent and a boron compound. As the polymerization component of the present invention, an epoxy component and an oxetane component are particularly preferably used.
摘要:
A prepreg of FRP (fiber reinforced plastic) having with (i) a matrix resin composition containing a bifunctional isocyanate and/or a trifunctional isocyanate, a polyol and a bifunctional chain extender having two active hydrogen groups at a molar ratio, as a functional group, of isocyanate:polyol:chain extender=5.0 to 1.0:1.0:4.0 to 0, or containing a bifunctional isocyanate and/or a trifunctional isocyanate and a polyol at a molar ratio, as a functional group, of liquid isocyanate:polyol=0.9 to 1.1:1.0; and (ii) a fibrous material. A production process of the prepreg. According to the present invention, the prepreg has a sufficient pot life and permits convenient production of an FRP molding.
摘要:
A resin transfer molding (RTM) molding device is designed to mold a fiber-reinforced plastic (FRP) molded body by injecting a resin composition into a mold and by impregnating the molded body therewith. The resin composition is a chain curing polymer (CCP). A CCP accommodating layer is disposed adjacent to an outer side of the molded body. The layer contains the CCP. The layer is provided with a Vf limit value, the value defined by the curing characteristics of the CCP and the characteristics of dissipation of heat from the CCP to the exterior. An element for separating the molded body is disposed between the body and the layer.
摘要:
Provided is an RTM moldable chain curing resin composition which can be molded with less energy in a short time, and which makes it possible to obtain a cured product that is superior in mechanical strength. A chain curing resin composition of the present invention includes an alicyclic epoxy compound (A) having two cyclohexene oxides in a molecule and a specific modified bisphenol A-type epoxy resin (B), and the content of the alicyclic epoxy compound (A) is 25 to 90% by mass, when the total of the component (A) and the component (B) is taken as 100% by mass.
摘要:
Provided is an RTM molding method enabling to yield an FRP molded body formed so as to be increased in the fiber volume content and to thereby be made more excellent in strength and lightweightness. The resin composition is a chain-curing resin composition, and after the initiation of the curing of the resin composition, the highest temperature at the curing head of the resin composition, undergoing chain curing, within 10 seconds after the initiation of the curing is increased to be higher by 50° C. or more than the temperature of the resin composition at after the impregnation and before the curing, and thus, the resin composition is chain-cured with a Vf of 41% or more.
摘要:
Provided are a matrix resin composition for fiber reinforced plastic, which comprises a bifunctional or trifunctional liquid diisocyanate, a bifunctional polyol and a bifunctional chain extender containing an active hydrogen group, with a molar ratio of the functional groups of the diisocyanate, polyol and chain extender of 5.0 to 1.0:1.0:4.0 to 0, respectively; and a process for producing fiber reinforced plastic, which comprises impregnating a fibrous material with the resin composition and then curing. The present invention makes it possible to produce a molding containing fibers densely, having excellent strength and inflatability, in the production of an FRP molding by using a thermosetting resin having an extended pot life.
摘要:
Provided is an RTM molding method enabling to yield an FRP molded body formed so as to be increased in the fiber volume content and to thereby be made more excellent in strength and lightweightness. The resin composition is a chain-curing resin composition, and after the initiation of the curing of the resin composition, the highest temperature at the curing head of the resin composition, undergoing chain curing, within 10 seconds after the initiation of the curing is increased to be higher by 50° C. or more than the temperature of the resin composition at after the impregnation and before the curing, and thus, the resin composition is chain-cured with a Vf of 41% or more.
摘要:
An energy-ray curing resin composition comprising a photopolymerizable resin component which can be cured by irradiation with an energy ray, a photopolymerization initiator component which makes it possible to cure the above photopolymerizable resin component by irradiation with an energy ray and a curing agent component used for curing at least one of the above photopolymerizable resin components by a method other than irradiation with an energy ray. To provide a high curability energy-ray curing resin composition which has a very high curing capacity as compared with those of conventional energy-ray curing resins and which is simple and has a high design freedom.