Abstract: A heat mode type negative image recording material is provided which comprises (A) a polymer compound that is insoluble in water but is soluble in an alkali aqueous solution and has at least one of groups represented by general formulae (1) to (3) on a side chain; (B) a photothermal conversion agent; and (C) an onium salt compound forming radicals by heat mode exposure with light that is capable of being absorbed by said photothermal conversion agent (B), said heat mode type negative image recording material being capable of recording an image by heat mode exposure. The general formulae are defined in the specification.

Abstract: A photosensitive composition comprising: at least one photopolymerization initiator; an N-oxyamide compound represented by formula (1); and a compound of undergoing a reaction by an effect of at least one of a radical and an acid to irreversibly change in its physical or chemical property, wherein X, Y and Z each independently represents a monovalent substituent.

Abstract: An image forming material includes an image forming layer containing a water-insoluble and alkali-soluble resin, a light-heat converting agent and a compound represented by the following general formula (1). In general formula (1), R1 to R3 independently represent an organic group, where R1 represents a residue forming a ring containing a N1 atom, R2 and R3 may bond to each other to form a ring or at least one of R2 and R3 may bond to R1 to form a ring and X? represents a conjugate base of an organic acid or inorganic acid. The ring containing the N1 atom is preferably a piperidine ring.

Abstract: An image recording material comprising (a) an infrared ray absorber and (b) a polymer to lower a dynamic coefficient of friction to from 0.38 to 0.60, which can undergo image formation upon exposure with infrared laser; or a long-chain alkyl group-containing polymer having a reduction rate of coefficient of friction to a base polymer of from 0.5 to 0.97, the polymer being a copolymer of a long-chain alkyl group-containing monomer having 6 or more carbon atoms and a hydrophilic monomer.

Abstract: A heat mode type negative image recording material is provided which comprises (A) a polymer compound that is insoluble in water but is soluble in an alkali aqueous solution and has at least one of groups represented by general formulae (1) to (3) on a side chain; (B) a photothermal conversion agent; and (C) an onium salt compound forming radicals by heat mode exposure with light that is capable of being absorbed by said photothermal conversion agent (B), said heat mode type negative image recording material being capable of recording an image by heat mode exposure. The general formulae are defined in the specification.

Abstract: A heat mode type negative image recording material is provided which comprises (A) a polymer compound that is insoluble in water but is soluble in an alkali aqueous solution and has at least one of groups represented by general formulae (1) to (3) on a side chain; (B) a photothermal conversion agent; and (C) an onium salt compound forming radicals by heat mode exposure with light that is capable of being absorbed by said photothermal conversion agent (B), said heat mode type negative image recording material being capable of recording an image by heat mode exposure. The general formulae are defined in the specification.

Abstract: This invention describes a heat sensitive composition comprising: (A-I) a compound which is represented by the following general formula (I) and generates a radical when heated, and (B-I) a compound having physical and chemical properties that are changed irreversibly by a radical, R—SO2?M+??General formula (I) wherein R represents an alkyl group or aryl group, and M+ represents a counter cation selected from sulfonium, iodonium, diazonium, ammonium and azinium; and a negative planographic printing plate precursor which can be recorded by heat mode using this composition. This invention also describes a planographic printing plate precursor comprising a substrate having disposed thereon a photosensitive layer containing (C-II) a light-heat converting agent, (B-II) a compound having a polymerizable unsaturated group, and (A-II) an onium salt having at least two cation parts in one molecule.

Abstract: A desensitizing treatment liquid for offset printing plates, which contains a compound represented by formula (I) wherein ? represents —PO3H2, —OPO3H2, or the salt thereof and R1 represents an organic residue which may have a substituent. The desensitizing treatment liquid gives no problems to environmental pollution, is stable to the long-period storage and the continuous use, can shorten the etching treatment time, and is excellent in the desensitizing treatment ability as well as can provide an offset printing plate having a good reproducibility of highly minute images of a middle tone, screen tint, etc., and capable of printing without forming scumming at the non-image area.

Abstract: A heat mode corresponding negative-type image recording material by which ablation in laser scanning when recording is suppressed, the intensity of the formed image portion can be high and a planographic plate excellent in plate life can be formed is provided. It is characterized in that it contains (A) polyurethane resin insoluble in water and soluble in an aqueous alkaline solution or a polymeric compound which has on the side chain thereof a group represented by the general formula (39) or the general formula (40) as a polymeric compound insoluble in water and soluble in an aqueous alkaline solution, (B) a radical-polymerizable compound, (C) a light-to-heat converting agent and (D) a compound generating a radical by heat mode exposure of a light of wavelength which can be absorbed by (C) a light-to-heat converting agent and image recording can be carried out by the heat mode exposure.

Abstract: The invention provides a negative image-recording material for heat-mode exposure systems, which comprises (A) an IR absorbent including cyanine dye having a substituent that contains an atom having an atomic weight of at least 28 such as halogen atom, or a substituent that contains a non-covalent electron pair such as carbonyl group, (B) a radical generator and (C) a radically-polymerable compound, and which is imagewise exposed to IR rays for image formation thereon.

Abstract: This invention describes a heat sensitive composition comprising: (A-I) a compound which is represented by the following general formula (I) and generates a radical when heated, and (B-I) a compound having physical and chemical properties that are changed irreversibly by a radical,

Abstract: A lithographic printing plate precursor comprises an image forming layer containing at least one polymer compound having a fluoroaliphatic group on the side chain, wherein the fluoroaliphatic group is derived from a fluoroaliphatic compound produced by a telomerization or oligomerization method.

Abstract: A negative image-recording material which can be imagewise-exposed by IR radiation from IR lasers and enables direct image formation from digital data of a computer or the like. The material, when used in a lithographic printing plate, ensures good hardenability in an image area, exhibits good printing durability, even if not heated for image-formation, and ensures a large number of good prints from the printing plate. The material includes (A) an IR absorber having an oxidation potential of at most 0.35 V (vs. SCE), (B) a thermal radical generator and (C) a radical-polymerizing compound. The material is imagewise-exposed to IR radiation for image formation. Preferably, the IR absorber (A) has, in a chromophoric group, an electron-donating substituent having a Hammett's &sgr;para value of at most −0.10, and the thermal radical generator (B) is an onium salt.

Abstract: This invention describes a heat sensitive composition comprising: (A-I) a compound which is represented by the following general formula (I) and generates a radical when heated, and (B-I) a compound having physical and chemical properties that are changed irreversibly by a radical, R—SO2−M+  General formula (I) wherein R represents an alkyl group or aryl group, and M+ represents a counter cation selected from sulfonium, iodonium, diazonium, ammonium and azinium; and a negative planographic printing plate precursor which can be recorded by heat mode using this composition. This invention also describes a planographic printing plate precursor comprising a substrate having disposed thereon a photosensitive layer containing (C-II) a light-heat converting agent, (B-II) a compound having a polymerizable unsaturated group, and (A-II) an onium salt having at least two cation parts in one molecule.

Abstract: A lithographic printing plate precursor comprises: a support; and an image-forming layer including a copolymer containing a specific fluoroaliphatic group and a repeating unit corresponding to at least one of a poly(oxyalkylene) acrylate and a poly(oxyalkylene) methacrylate.

Abstract: Provided is a photopolymerizable composition which has a high sensitivity to not only ultraviolet light but also to visible to infrared light.

Abstract: A negative image-recording material which can be imagewise exposed to IR radiation from IR lasers and ensures direct image formation from digital data of a computer or the like. The material, when used in a lithographic printing plate, ensures good hardenability in an image area and exhibits good printing durability, even if not heated for image formation, and ensures a large number of good prints from the printing plate. The recording material contains (A) an IR absorber, (B) a radical generator having an onium salt structure, (C) a radical-polymerizing compound, and (D) a reducing additive, and this is imagewise exposed to IR radiation for image formation. Preferably, the reducing additive (D) is highly reactive with radicals and a reaction product with a radical has high reductivity. Preferred examples of the reducing additive are ether-type hydrogen donors, alcohol-type hydrogen donors, vinyl ethers and phosphine-type compounds.

Abstract: A method for producing a lithographic printing plate is disclosed, comprising performing the plate-making by scan exposing a lithographic printing original plate comprising a hydrophilic support having thereon a photosensitive layer containing i) at least one polyurethane resin binder, ii) at least one compound having an addition polymerizable ethylenically unsaturated bond, and iii) at least one photopolymerization initiation system. Also disclosed are a photosensitive composition for use in the photosensitive layer of the lithographic printing original plate.

Abstract: The present invention includes a support having thereon an image forming layer containing at least a water-insoluble and alkali-soluble high-molecular compound and a dissolution inhibitor. The dissolution inhibitor is a compound having a structure represented by the following general formula (1) and having an absorption maximum at a wavelength in a range of 760 nm to 1,200 nm, or an onium salt represented by the following general formula (2).

Abstract: A negative image recording material on which an image is formable by exposure, comprising (A) a specific polymer compound that has at least one carbon—carbon double bond in a side chain thereof and a glass transition temperature of 80° C. or more, and is soluble in an aqueous alkaline solution, (B) a light-heat converting agent, and (C) a compound that generates radicals by exposure using light of a wavelength absorbable by the light-heat converting agent. The negative image recording material may also preferably includes (D) a radical-polymerizable compound. Preferably, the (A) specific polymer compound contains at least 1.5 meq/g of the carbon—carbon double bond in the side chain thereof.