摘要:
A planographic printing plate precursor obtained by laminating on a substrate, a layer composed of a hydrophobic polymer which can be made hydrophilic by heating, and a layer of which exposed portions can be removed by heat mode exposure.
摘要:
A planographig printing plate precursor which can be written by heat mode exposure of low energy, has excellent strength in image portions and blemishing resistance, can be developed with water, or can be installed in a printing machine as it is for conducting printing without requiring specific treatment such as wet developing treatment, rubbing and the like after writing of an image, and a method for producing the same, are provided. The planographic printing plate precursor of the present invention is obtained by laminating on a substrate having a hydrophilic surface a layer composed of a hydrophobic polymer which is made hydrophilic by heating and either a layer composed of a hydrophilic polymer compound having in the side chain at least one of alkylene oxide groups or functional groups selected from --COOR, --COOM, --SOR, --SO.sub.2 R, --SO.sub.3 R, --SOM, --SO.sub.2 M, --SO.sub.3 M, --OH, --NR.sup.22 R.sup.23 (wherein, R represent a hydrogen atom, alkyl group or aryl group, M represents a metal atom, R.sup.22 and R.sup.23 each independently represent a hydrogen atom, alkyl group or aryl group) or a layer of which exposed portions can be removed by heat mode exposure.
摘要:
A radiation-sensitive planographic printing plate which is excellent in terms of durability wherein development with water, or direct production of the plate from digital data through infrared laser recording in particular such that a special process is not necessary, is possible, by forming on a support a photosensitive layer containing a reaction product of a compound having in a molecule thereof a functional group X and a functional group Y and a compound represented by a formula (1) stated below, or alternatively, containing a polymerization product of a compound having the functional group X and a compound represented by the formula (1) stated below. Further by incorporating water-insoluble particles in this photosensitive layer, many voids are formed in the photosensitive layer, further improving sensitivity and discrimination. The functional group X is a group selected from among a sulfonic acid ester group, a disulfone group, a sulfonimide group, and an alkoxyalkyl ester group and the functional group Y is a group selected from among --OH, --NH.sub.2, --COOH, --NH--CO--R.sub.3, and --Si(OR.sub.4).sub.3 [wherein R.sub.3 and R.sub.4 each represents an alkyl group or an aryl group].(R.sub.1).sub.n --X--(OR.sub.2).sub.4-n (1)wherein R.sub.1 and R.sub.2 each represents an alkyl group or an aryl group; X represents Si, Al, ti, or Zr; and n represents an integer from 0 to 2.
摘要:
A base material for a lithographic printing plate comprising a support, a hydrophilic organic polymer compound that is chemically bonded to a surface of the support, and an ionic compound that is ionically bonded to the hydrophilic organic polymer compound; and a lithographic printing plate comprising the base material and an image forming layer provided thereon.
摘要:
Disclosed is a positive or negative lithographic printing plate precursor which can form an image at high sensitivity by heating or heat developed by light-heat conversion, requires no development processing after image writing, has good sensitivity and excellent printing durability, is significantly improved in scumming resistance, and can directly make a plate by operating an infrared laser based on a digital signal, the precursor comprising a polymer compound having a functional group changeable in hydrophilicity by heat, acid or radiation and an under layer with which the polymer compound combined, wherein the polymer compound is a straight-chain polymer compound directly combined at an end of a polymer chain thereof with a surface of the under layer by chemical bonding, or comprises (i) a polymer backbone chemically combined with a surface of the under layer and (ii) a straight-chain polymer compound combined at an and of a polymer chain thereof with the polymer backbone and having a functional group changeable in hydrophilicity.
摘要:
An object of the present invention is to provide excellent in terms of durability wherein development with water, or direct production of the plate from digital data through infrared laser recording in particular such that a special process is not necessary, is possible, by forming on a support a photosensitive layer containing a reaction product of a compound having in a molecule thereof a functional group X and a functional group Y and a compound represented by a formula (1) stated below, or alternatively, containing a polymerization product of a compound having the functional group X and a compound represented by the formula (1) stated below. Further by incorporating water-insoluble particles in this photosensitive layer, many voids are formed in the photosensitive layer, further improving sensitivity and discrimination. The functional group X is a group selected from among a sulfonic acid ester group, a disulfone group, a sulfonimide group, and an alkoxyalkyl ester group and the functional group Y is a group selected from among —OH, —NH2, —COOH, —NH—CO—R3, and —Si(OR4)3 [wherein R3 and R4 each represents an alkyl group or an aryl group]. (R1)n—X—(OR2)4−n (1) (1) is (R1)n—X—(OR2)4−n wherein R1 and R2 each represents an alkyl group or an aryl group; X represents Si, Al, Ti, or Zr; and n represents an integer from 0 to 2.
摘要:
A lithographic printing plate precursor is disclosed, comprising a support having sequentially formed thereon a layer containing an ionic polymer complex (Layer A) which is insoluble in water and an aqueous alkali solution and a recording layer thermally variable in the solubility in at least one of water and an aqueous solution (Layer B), the support having a hydrophilic surface and at least one of Layer A and Layer B containing a light-heat converting agent.
摘要:
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.
摘要:
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.
摘要:
A method of making a lithographic printing plate by forming images at the surface of a lithographic printing plate precursor by means of a thermal head, with the lithographic printing plate precursor having on a support a recording layer comprising a polymer having at least either carboxylic acid or carboxylate groups capable of causing thermal decarboxylation; and a photopolymer composition for recording by exposure to infrared laser beams, wherein a thermally decarboxylation-causing polymer and a photothermal converter are comprised.