Abstract: Disclosed are a photopolymerizable composition and a recording material containing the composition. The composition comprises a polymerizable compound having an ethylenic unsaturated bond, a compound of the following general formula (1), and a radical generator that interacts with the compound of formula (1) to generate a radical.

Abstract: The present invention provides a photopolymerizable composition and a recording material using the photopolymerizable composition, which contains a polymerizable compound having an ethylenic unsaturated group, an organic borate and a cationic compound that interacts with the organic borate. The organic borate is represented by the following formula (1) wherein R1 represents an alkyl group, R2 represents an electron-donating group, R3 to R6 each represent a hydrogen atom or a substituent, the sum of Hammett's substituent constants &sgr; of R2 to R6 is 0 to 1, and Z+ represents a group that can form a cation. The organic borate has a melting point of no more than 100° C.

Abstract: A photopolymerizable composition and a recording material containing the composition. The composition include at least a radical-polymerizable compound and a photopolymerization initiator, in which the photopolymerization initiator contains a borate compound, having a melting point of not more than 140° C., of the following general formula (I) in which R1, R2, R3 and R4 each independently represent an alkyl group, aryl group, heterocyclic group, or silyl group; and Z+ represents a cation.

Abstract: The present invention provides a dye precursor for forming color through contact with a base and which is represented by either of the following formulas (1) and (2): wherein Ar represents an aromatic ring or a heterocyclic ring, each of which may have a substituent; Cp represents a coupler residue; L1 represents a protective group which can be eliminated by a base; and L2 represents an elimination group or a protective group which is eliminated after L1 is eliminated. Further, the present invention provides an image forming material and an image forming method, wherein the image forming material has an image forming layer on a support, the image forming layer containing at least one type of each of a photopolymerization initiator, a dye precursor which can form color through contact with a base, a base or a base precursor, and a polymerizable compound.

Abstract: Disclosed are a photopolymerizable composition and a recording material containing the composition. The composition comprises a polymerizable compound having an ethylenic unsaturated bond, a compound of the following general formula (1), and a radical generator that interacts with the compound of formula (1) to generate a radical. In formula (1), each of R1, R2 and R4 is an aliphatic or aromatic group; R3 is a group shown below; R5 is a hydrogen atom, or an aliphatic, aromatic or heterocyclic group; Each of L1 to L4 is a substituted or unsubstituted methine group; Each of Z1 to Z3 is an atomic group which forms a 5-membered nitrogen-containing hetero ring; and X− is a group which forms an anion.

Abstract: A photopolymerizable composition that is highly sensitive not only to ultraviolet light, but also light in the range from visible light to infrared light, and a recording material containing the photopolymerizable composition, which is excellent in sensitivity and decolorization property in the background part, and which is capable of forming sharp images with high contrast. The photopolymerizable composition contains a polymerizable compound having an ethylenic unsaturated bond and a radical generator capable of forming a radical by the action of the compound and the radical generator upon each other.

Abstract: A novel cyanine-based dye, a photopolymerizable composition having high sensitivity not only to ultraviolet light but also to visible-to-infrared light, and a recording material which is excellent in sensitivity and decolorization in background and which can form sharp, high-contrast images. The cyanine-based dye is an organic dye represented by the following general formula (3).

Abstract: Disclosed is a photopolymerizable composition containing a polymerizable compound having an addition-polymerizable unsaturated bond, an organic dye, and an organoboron compound represented by the following general formula (I), wherein at least one kind of the organoboron compound is included and the proportion thereof is one mole or more per mole of the organic dye.

Abstract: Disclosed is a photosensitive composition useful for preparation of various imaging materials and having good stability over time and a high sensitivity. The composition comprises a polymerizable monomer, a photopolymerization initiator, and a diazonium salt having a specific, borate anion portion represented by the general formula (I-1) or (I-2) given below, or the like. A combination of a specific borate compound and a general-purpose diazonium salt can also be used in place of the above-mentioned diazonium salt.

Abstract: Disclosed is a light and heat sensitive recording material which permits recording using infrared laser light, requires no developing solution or the like, causes no unnecessary generation of waste, and is capable of forming completely dry, black-and-white monochrome or color, and clear images with high contrast. The light and heat sensitive recording material comprises a light and heat sensitive recording layer disposed on a support member, comprising the light and heat sensitive recording layer. It includes an electron donating colorless dye contained in heat-responsive microcapsules; and an electron accepting compound, a polymerizable monomer which is cured by irradiation with light, and an organic borate salt or an organic borate salt of a cationic coloring material which develops functions as a photo polymerizing initiator when irradiated with light which are arranged outside the heat responsive microcapsules.

Abstract: A light-sensitive resin composition which can be developed in an alkaline aqueous solution and has an excellent image-forming performance and a sufficient UV absorbance after an image formation is disclosed. The light-sensitive resin composition includes (1) a photopolymerization initiator or a photopolymerization initiator system, (2) an addition-polymerizable monomer having an ethylenically unsaturated double bond, (3) a high molecular binder which is soluble in an alkaline aqueous solution and insoluble in water, and (4) at least one of the compounds which substantially do not absorb light in a specified UV region and which, when subjected to treatment with an aqueous alkali solution and/or to heating, are capable of absorbing light in that region and have substantially no absorption in the visible region.

Abstract: A polymerizable phenol compound represented by the formula (I): ##STR1## wherein X represents a hydrogen atom, an alkyl group, a halogen atom, an alkylsulfonyl group, a hydroxyl group or a substituted or unsubstituted phenyl group; Y represents a hydrogen atom, a hydroxyl group, an alkoxy-carbonyl group, a halogen atom, an alkyl group, an alkyl-sulfonyl group, an alkoxy group, an alkanoyloxy group, an acryloyloxy group or a methacryloyloxy group; Z represents --COO--, --O--, --SO.sub.2 -- or --SO.sub.2 NH--; R represents a divalent linkage group having an --O--, --S--, --SO.sub.2 --, --CO--, --NH--, or a cyclic structure; and P represents an acryloyloxy group or a methacryloyloxy group.

Abstract: A hydroxybenzenesulfone compound represented by the following formula (I): ##STR1## wherein all symbol are defined in the specification, and a process for producing the compound is disclosed. Further, a process for producing a hydroxybenzenesulfone compound having an alcoholic hydroxyl group and represented by the following formula (III): ##STR2## wherein all symbols are defined in the specification, comprising the step of oxidizing a hydroxyalkylthiophenol compound having an alcoholic hydroxyl group is disclosed. Furthermore a process for producing a compound represented by the following formula (IV): ##STR3## wherein all symbols are defined in the specification, comprising the step of reacting a hydroxyalkylthiophenol compound with an acrylic acid halide or a methacrylic halide in a polar solvent is disclosed.

Abstract: A recording medium which comprises a support having thereon a layer containing an electron-donating achromatic dye incorporated in microcapsules and an electron-accepting compound, wherein said electron-accepting compound is a 3-halo-4-hydroxybenzoic acid ester having a polymerizable ethylene group. The recording medium provides a high color density at image part, a low fog density at non-image part and markedly high stability of the non-image part.

Abstract: A light- and heat-sensitive recording material comprising a support having thereon at least one light- and heat-sensitive layer comprising, (1) microcapsules containing an electron donative colorless dye, and (2) a light-hardenable composition containing (a) a polymerizable vinyl monomer, (b) a photopolymerization initiator, and (c) an electron acceptive developer and a light- and heat-sensitive recording material comprising a support having thereon at least one light- and heat-sensitive layer comprising, (1) microcapsules containing an electron donative colorless dye, and (2) a light-hardenable composition containing (d) an electron acceptive polymerizable vinyl monomer and (b) a photopolymerization initiator.