IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0923415
(2004-08-20)
|
우선권정보 |
JP-2003-306272(2003-08-29) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Konica Minolta Medical &
- Graphic, Inc.
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대리인 / 주소 |
Frishauf, Holtz, Goodman &
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인용정보 |
피인용 횟수 :
1 인용 특허 :
6 |
초록
▼
Disclosed is a planographic printing plate material comprising a hydrophilic support and provided thereon, a light sensitive layer and an overcoat layer in that order, wherein the light sensitive layer contains (a) an alkali soluble polymer, (b) a polymerizable compound having an ethylenically unsat
Disclosed is a planographic printing plate material comprising a hydrophilic support and provided thereon, a light sensitive layer and an overcoat layer in that order, wherein the light sensitive layer contains (a) an alkali soluble polymer, (b) a polymerizable compound having an ethylenically unsaturated bond, (c) a polymerization initiator, and (d) an anionic dye represented by the following formula (1) ,
대표청구항
▼
What is claimed is: 1. A planographic printing plate material comprising a hydrophilic support and provided thereon, a light sensitive layer and an overcoat layer in that order, wherein the light sensitive layer contains (a) an alkali soluble polymer, (b) a polymerizable compound having an ethyleni
What is claimed is: 1. A planographic printing plate material comprising a hydrophilic support and provided thereon, a light sensitive layer and an overcoat layer in that order, wherein the light sensitive layer contains (a) an alkali soluble polymer, (b) a polymerizable compound having an ethylenically unsaturated bond, (c) a polymerization initiator, and (d) an anionic dye, wherein the polymerization initiator is a metallocene compound, and the anionic dye is represented by the following formula (1), Formula (1) wherein R1 represents a substituted or unsubstituted alkyl group having a carbon atom number of from 4 to 18, a cycloalkyl group having a carbon atom number of from 4 to 18, or a substituted or unsubstituted aryl group having a carbon atom number of from 6 to 18; R2 through R11 independently represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having a carbon atom number of from 1 to 6, a cycloalkyl group having a carbon atom number of from 4 to 6, a substituted or unsubstituted aryl group having a carbon atom number of from 6 to 18 or--N(R12) (R 13) in which R12 and R13 independently represent a substituted or unsubstituted alkyl group having a carbon atom number of from 1 to 6, a cycloalkyl group having a carbon atom number of from 4 to 6, or a substituted or unsubstituted aryl group having a carbon atom number of from 6 to 18; and Y+ represents a hydrogen ion, an alkali metal ion or an onium ion. 2. The planographic printing plate material of claim 1 wherein the light sensitive layer further contains a polyhalogenated compound as the polymerization initiator. 3. The planographic printing plate material of claim 2, wherein the polyhalogenated compound is a polyhalomethylsulfone, a polyhalomethyl oxadiazole, or a compound having a polyhaloacetyl structure represented by the following formula (2), description="In-line Formulae" end="lead"R21--CX2--(C═O)--R22 Formula (2)description="In-line Formulae" end="tail" wherein R21 represents a hydrogen atom, a bromine atom, a chlorine atom, an alkyl group, an arylgroup, an acyl group, an alkylsulfonyl group, an arylsulfonyl group or a cyano group; R22 represents a hydrogen atom or a monovalent organic substituent, provided that R21 and R22 may combine with each other to form a ring; and X represents a bromine atom or a chlorine atom. 4. The planographic printing plate material of claim 1, wherein the alkali soluble polymer has a weight average molecular weight of from 15,000 to 500,000, and an acidvalue of from 30 to 200. 5. The planographic printing plate material of claim 1, wherein the alkali soluble polymer has a repeating monomer unit having an ethylenically unsaturated bond in an amount of from 5 to 50 mol % in the molecule. 6. The planographic printing plate material of claim 1, wherein the polymerizable compound having an ethylenically unsaturated bond is a polyfunctional acrylate having an amido bond and a secondary or tertiary amino group in the molecule. 7. A process of preparing a planographic printing plate, the process comprising the steps of: imagewise exposing the planographic printing plate material of claim 1, employing a laser with an emission wavelength of from 400 to 600 nm; heating the resulting exposed material at a temperature of from 80 to 150째 C. for 3 to 30 seconds; and developing the heated material with an alkali developer having a pH of from 10 to 12.5.
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