Lithographic printing plate precursor

Patent metadata

Field	Value
Publication number	US-10151975-B2
Application number	US-201415037332-A
Country	US
Kind code	B2
Filing date	Dec 10, 2014
Priority date	Dec 11, 2013
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

A lithographic printing plate precursor includes (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, and (ii) a coating including a photopolymerisable layer, characterised in that the photopolymerisable layer includes a compound including at least one free radically polymerisable group and at least one moiety having a structure according to Formula (I):

wherein X represents O or NR* and R* represents hydrogen, an optionally substituted alkyl, aryl, aralkyl or heteroaryl group; and * denotes the linking positions to the rest of the compound.

First claim

The invention claimed is:

1. A lithographic printing plate precursor comprising:
a support including a hydrophilic surface or a hydrophilic layer; and
a coating including a photopolymerizable layer; wherein
the photopolymerizable layer includes a compound including a free radical polymerizable group and at least one moiety having a structure according to Formula (I):

wherein
X represents O; and
* denotes linking positions to remaining portions of the compound.

2. The lithographic printing plate precursor according to claim 1 , wherein the compound is represented by Formula (II):

wherein
X represents O;
L 1 and L 2 are independently a divalent, trivalent, four-valent, five-valent, or six-valent linking group;
L* represents a divalent linking group;
A 1 and A 2 independently represent an ethylenical unsaturated group or a terminal group;
a represents 1, 2, 3, 4, or 5, respectively, for the divalent, trivalent, four-valent, five-valent, or six-valent linking group L 1 ;
b represents 1, 2, 3, 4, or 5, respectively, for the divalent, trivalent, four-valent, five-valent, or six-valent linking group L 2 ; and
c is an integer ranging from 0 to 150.

3. The lithographic printing plate precursor according to claim 2 , wherein the compound is represented by Formula (V):

wherein
X represents O;
L 1 and L 2 are independently a divalent, trivalent, four-valent, five-valent, or six-valent linking group;
A 1 and A 2 independently represent an ethylenical unsaturated group or a terminal group;
a represents 1, 2, 3, 4, or 5, respectively, for the divalent, trivalent, four-valent, five-valent, or six-valent linking group L 1 ; and
b represents 1, 2, 3, 4, or 5, respectively, for the divalent, trivalent, four-valent, five-valent, or six-valent linking group L 2 .

4. The lithographic printing plate precursor according to claim 3 , wherein the compound is represented by Formula (VI):

wherein
X represents O;
L 1 and L 2 represent a divalent linking group; and
A 1 and A 2 independently represent an ethylenical unsaturated group or a terminal group.

5. The lithographic printing plate precursor according to claim 2 , wherein the ethylenical unsaturated group includes an acrylamide group or a methacrylamide group.

6. The lithographic printing plate precursor according to claim 3 , wherein the ethylenical unsaturated group includes an acrylamide group or a methacrylamide group.

7. The lithographic printing plate precursor according to claim 4 , wherein the ethylenical unsaturated group includes an acrylamide group or a methacrylamide group.

8. The lithographic printing plate precursor according to claim 2 , wherein L 1 and L 2 independently represent an optionally substituted alkylene, cycloalkylene, arylene, or heteroarylene, —CH2-, —O—, —CO—, —CO—O—, —O—CO—, —CO—NH—, —NH—CO—, >N—CO—, —CO—N<, —NH—CO—O—, >N—CO—O—, —O—CO—NH—, —O—CO—N<, —NH—CO—NH—, >N—CO—NH—, —NH—CO—N<, >N—CO—N<, —NH—CS—NH—, >N—CS—NH—, —NH—CS—N<, >N—CS—N<, —CO—NR′—, —NR″—CO—, —SO—, —SO 2 —, —SO 2 —NH—, —SO 2 —N<, —NH—SO 2 —, >N—SO 2 —, —CH═N—, >C═N—, —NH—NH—, >N—NH—, —NH—N<, >N—N<, —N + (CH 3 ) 2 —, —N + (CH 3 )<, >N + (CH 3 )—, >N + <, —S—, —S—S—, —NH—CO—CO—NH—, —NH—CO—CO—N<, >H—CO—CO—NH—, >N—CO—CO—N<,

and/or combinations thereof; and
R′ and R″ each independently represent an optionally substituted alkyl, aryl, aralkyl, or heteroaryl.

9. The lithographic printing plate precursor according to claim 3 , wherein L 1 and L 2 independently represent an optionally substituted alkylene, cycloalkylene, arylene, or heteroarylene, —CH2-, —O —, —CO—, —CO—O—, —O—CO—, —CO—NH—, —NH—CO—, >N—CO—, —CO—N<, —NH—CO—O—, >N—CO—O—, —O—CO—NH—, —O—CO—N<, —NH—CO—NH—, >N—CO—NH—, —NH—CO—N<, >N—CO—N<, —NH—CS—NH—, >N—CS—NH—, —NH—CS—N<, >N—CS—N<, —CO—NR′—, —NR″—CO—, —SO—, —SO 2 —, —SO 2 —NH—, —SO 2 —N<, —NH—SO 2 —, >N—SO 2 —, —CH═N—, >C═N—, —NH—NH—, >N—NH—, —NH—N<, >N—N<, —N + (CH 3 ) 2 —, —N + (CH 3 )<, >N + (CH 3 )—, >N + <, —S—, —S—S—, —NH—CO—CO—NH—, —NH—CO—CO—N<, >H—CO—CO—NH—, >N—CO—CO—N<,

and/or combinations thereof; and
R′ and R″ each independently represent an optionally substituted alkyl, aryl, aralkyl, or heteroaryl.

10. The lithographic printing plate precursor according to claim 4 , wherein L 1 and L 2 independently represent an optionally substituted alkylene, cycloalkylene, arylene, or heteroarylene, —CH2-, —O—, —CO—, —CO—O—, —O—CO—, —CO—NH—, —NH—CO—, >N—CO—, —CO—N<, —NH—CO—O—, >N—CO—O—, —O—CO—NH—, —O—CO—N<, —NH—CO—NH—, >N—CO—NH—, —NH—CO—N<, >N—CO—N<, —NH—CS—NH—, >N—CS—NH—, —NH—CS—N<, >N—CS—N<, —CO—NR′—, —NR″—CO—, —SO—, —SO 2 —, —SO 2 —NH—, —SO 2 —N<, —NH—SO 2 —, >N—SO 2 —, —CH═N—, >C═N—, —NH—NH—, >N—NH—, —NH—N<, >N—N<, —N + (CH 3 ) 2 —, —N + (CH 3 )<, >N + (CH 3 )—, >N + <, —S—, —S—S—, —NH—CO—CO—NH—, —NH—CO—CO—N<, >H—CO—CO—NH—, >N—CO—CO—N<,

and/or combinations thereof; and
R′ and R″ each independently represent an optionally substituted alkyl, aryl, aralkyl, or heteroaryl.

11. A method of making the lithographic printing plate precursor according to claim 1 , the method comprising the steps of:
providing the support and the coating ;
applying the coating to the support; and
drying the lithographic printing plate precursor.

12. A method of making a lithographic printing plate comprising the steps of:
providing the lithographic printing plate precursor according to claim 1 ;
image-wise exposing the lithographic printing plate precursor with a laser emitting IR-light or violet light; and
developing the lithographic printing plate precursor off-press by treating the lithographic printing plate precursor with a developing solution to remove non-exposed areas of the coating from the support.

Assignees

• Agfa Nv

Inventors

• Steenackers Marin
• Loccufier Johan
• Verbrugghe Sam

Classifications

• B41C2210/22

  characterised by organic non-macromolecular additives, e.g. dyes, UV-absorbers, plasticisers · CPC title

• G03F7/004

  Photosensitive materials (G03F7/12, G03F7/14 take precedence) · CPC title

• B41C2210/24

  characterised by a macromolecular compound or binder obtained by reactions involving carbon-to-carbon unsaturated bonds, e.g. acrylics, vinyl polymers · CPC title

• G03F7/0045

  with organic non-macromolecular light-sensitive compounds not otherwise provided for, e.g. dissolution inhibitors · CPC title

• B41C1/1008 Primary

  by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials · CPC title