摘要:
A photocurable prepreg sheet for waterproofing includes (1) a fiber-reinforced resin layer which comprises a sheet-shaped inorganic or organic fibrous reinforcing material impregnated with a resin composition comprising: (A) an unsaturated polyester resin and/or vinyl ester resin: 100 parts by weight, and (B) at least two photopolymerization initiators having photosensitivity in different wavelength ranges from ultraviolet range to near infrared range: 0.01 to 10 parts by weight, and which is treated with light of a specific wavelength to thereby undergo prepolymerization which causes at least one of the polymerization initiators and radical-polymerizable unsaturated groups to remain partially intact; and (2) film which covers an upper surface and a back surface of the fiber-reinforced resin layer. The waterproofing material does not require resin impregnation work, can be installed within a short time with successful resin setting, is free form the risk and cumbersome procedure which are caused when a peroxide catalyst is directly handled, and permits adjustment of the pot life. Also disclosed are method and apparatus for production of the prepreg sheet, and waterproofing method using the sheet.
摘要:
A photocurable prepreg composition which is characterized by easy control of a B stage state of a thermosetting resin such as an unsaturated polyester resin or an epoxy acrylate resin, excellent storage stability, and remarkable curability after being shaped; as well as a production method therefor. A photocurable prepreg composition which contains an unsaturated polyester resin and/or an epoxy acrylate resin; at least two photopolymerization initiators with photosensitivity in different wavelength ranges; and an inorganic or an organic fiber-reinforcing material and/or filler, and which composition is treated with light of a specific wavelength such that at least one photopolymerization initiator and radical-polymerizable unsaturated groups remain partially in said resin; a production method therefor; and formed articles produced therefrom.
摘要:
A curable composite material composition comprising (A) a polymerizable unsaturated compound, (B) a fiber reinforcing material and/or fiber, and (C) a polymerization initiator comprising an organic boron compound represented by the general formula (1) wherein R1, R2, R3 and R4 each independently represent an alkyl, aryl, allyl, aralkyl, alkenyl, alkynyl, silyl or heterocyclic group, a halogen atom, or a substituted alkyl, substituted aryl, substituted allyl, substituted aralkyl, substituted alkenyl, substituted alkynyl or substituted silyl group, and Z+ represents a cation, and an acidic compound, as well as a curing process for the curable composite material composition which includes irradiating and/or heating the curable composite material composition.
摘要:
A curable composite material composition comprising (A) a polymerizable unsaturated compound, (B) a fiber reinforcing material and/or fiber, and (C) a polymerization initiator comprising an organic boron compound represented by the general formula (1) wherein R1, R2, R3 and R4 each independently represent an alkyl, aryl, allyl, aralkyl, alkenyl, alkynyl, silyl or heterocyclic group, a halogen atom, or a substituted alkyl, substituted aryl, substituted allyl, substituted aralkyl, substituted alkenyl, substituted alkynyl or substituted silyl group, and Z+ represents a cation, and an acidic compound, as well as a curing process for the curable composite material composition which includes irradiating and/or heating the curable composite material composition.
摘要:
Color reversion of photocured products which have been photocured with cationic dyes and quaternary organo borates can be notably suppressed by addition of phenolic compounds, aromatic thiol compounds, amine compounds and/or phosphorous compounds.
摘要:
A photocurable composition comprising an ultraviolet radical polymerization initiator, a cationic dye with absorptions in the visible light region, a quaternary boron salt and optionally a polymerization accelerator, is irradiated with ultraviolet light and visible light either simultaneously or separately, to achieve adequate hardening in air of both the surface and the interior of the cured product, and to provide a cured product with an excellent appearance and without production of coloring substances derived from the polymerization initiator.
摘要:
A photocurable paint composition for road markings is disclosed, comprising (A) a compound having an ethylenically unsaturated group, (B) a filler, (C) a cationic dye represented by formula (1): D+&Circlesolid;A1− (1) (wherein D+ represents a cation having an absorption maximum wavelength in the wavelength region of from 400 to 1,200 nm, and A1− represents an optional anion), (D) a quaternary organic borate-type sensitizer represented by formula (2): (wherein R1, R2, R3 and R4 each independently represents an alkyl group, an aryl group, an aralkyl group, an alkenyl group, an alkynyl group, a silyl group, a heterocyclic group or a halogen atom, and Z+ represents an optional cation) and (E) an ultraviolet radical polymerization initiator capable of generating a radical upon absorption of light at a wavelength of 400 nm or less, or additionally comprising (F) glass beads.
摘要:
An ink composition for ink jet printing is provided which gives a cured object excellent in adhesion to metallic plates, resistance to etchants, and alkali removability and can be stably ejected with an ink jet apparatus. The ink jet composition for etching resists has a viscosity at 25° C. of 3-50 mPa s and includes monomers comprising: either a polymerizable phosphoric ester compound represented by general formula (I); a polyfunctional monomer having two or more ethylenic double-bond groups per molecule and having no phosphoric ester group, the content of the ethylenic double-bond groups being 4×10−3 to 8×10−3 mol/g; and a monofunctional monomer having one ethylenic double-bond group per molecule and having neither phosphoric ester group nor carboxy group. In the formula, X represents C1-3 alkylene, Y represents C2-3 alkylene, and R represents hydrogen or methyl.
摘要:
In an organic electroluminescence element which incorporates a substrate having thereon an anode and a cathode and which incorporates a plurality of organic layers between the aforesaid anode and cathode, wherein at least one of the aforesaid organic layers is a first organic layer incorporating a compound having at most 10 repeating units, the first organic layer being prepared by coating the compound having at least one polymerizable group, followed by polymerization.
摘要:
A silver halide light-sensitive color photographic material is disclosed. A green-sensitive silver halide emulsion layer of the material comprises a coupler the formula M-I or formula M-II defined in the specification, and the color photographic material provides enhanced sensitivity and excellent color reproduction property when it is printed, and improved resistance against formalin gas and storage preservation property before exposure. ##STR1##