Lithographic printing plate precursor, method for producing lithographic printing plate, polymer particle, and composition

Patent metadata

Field	Value
Publication number	US-11590751-B2
Application number	US-201916695206-A
Country	US
Kind code	B2
Filing date	Nov 26, 2019
Priority date	May 31, 2017
Publication date	Feb 28, 2023
Grant date	Feb 28, 2023

Abstract

A lithographic printing plate precursor has an image-recording layer on a hydrophilic support, wherein the image-recording layer includes a polymer particle including an addition polymerization resin having a hydrophilic structure and a crosslinking structure. A method for producing a lithographic printing plate uses the lithographic printing plate precursor. A polymer particle includes an addition polymerization resin having a hydrophilic structure and a crosslinking structure. A composition includes the polymer particle.

First claim

What is claimed is:

1. A lithographic printing plate precursor comprising:
an image-recording layer on a hydrophilic support,
wherein the image-recording layer includes a polymer particle including an addition polymerization resin having a hydrophilic structure and a crosslinking structure, an infrared absorber, a polymerization initiator, a polymerizable compound, and a radical production aid,
the crosslinking structure is a constituent unit formed by the polymerization of a polyfunctional ethylenically unsaturated compound, and
the addition polymerization resin has a constituent unit represented by Formula A-4 as a constituent unit having the hydrophilic structure,

in Formula A-4, L 3 represents an alkylene group having 2 to 10 carbon atoms, L 4 represents an alkylene group having 1 to 10 carbon atoms, R 6 represents a hydrogen atom, an alkyl group, or an aryl group, R 7 represents a hydrogen atom or a methyl group, m2 represents an integer of 2 to 20, and * represents a bonding position with other structures.

2. The lithographic printing plate precursor according to claim 1 ,
wherein the crosslinking structure includes at least one constituent unit selected from the group consisting of constituent units represented by BR-1 to BR-16,

in the structure, R BR each independently represent a hydrogen atom or a methyl group, n represents an integer of 1 to 20, and * represents a bonding position with other structures.

3. The lithographic printing plate precursor according to claim 1 ,
wherein the image-recording layer further includes a binder polymer.

4. The lithographic printing plate precursor according to claim 1 , further comprising:
a protective layer on the image-recording layer.

5. The lithographic printing plate precursor according to claim 4 ,
wherein the protective layer includes an inorganic lamellar compound.

6. The lithographic printing plate precursor according to claim 1 ,
wherein a non-exposed portion of the image-recording layer can be removed by at least any of dampening water or printing ink.

7. A method for producing a lithographic printing plate comprising:
exposing the lithographic printing plate precursor according to claim 1 in an image shape and forming an exposed portion and a non-exposed portion; and
removing the non-exposed portion by supplying at least one of printing ink or dampening water.

8. A method for producing a lithographic printing plate comprising:
exposing the lithographic printing plate precursor according to claim 1 in an image shape and forming an exposed portion and a non-exposed portion; and
removing the non-exposed portion by supplying a developer having a pH of 2 or higher and 11 or lower.

9. The lithographic printing plate precursor according to claim 1 , wherein the crosslinking structure is a difunctional to quinquedecafunctional branched unit.

10. A lithographic printing plate precursor comprising:
an image-recording layer on a hydrophilic support,
wherein the image-recording layer includes a polymer particle including an addition polymerization resin having a hydrophilic structure and a crosslinking structure, an infrared absorber, a polymerization initiator, a polymerizable compound, and a radical production aid,
the crosslinking structure is a constituent unit formed by the polymerization of a polyfunctional ethylenically unsaturated compound,
the addition polymerization resin has a constituent unit represented by Formula A-3 or Formula A-4 as a constituent unit having the hydrophilic structure,

in Formula A-3 and Formula A-4, L 2 represents an ethylene group or a propylene group, L 3 represents an alkylene group having 2 to 10 carbon atoms, L 4 represents an alkylene group having 1 to 10 carbon atoms, R 4 and R 6 each independently represents a hydrogen atom, an alkyl group, or an aryl group, R 5 and R 7 each independently represents a hydrogen atom or a methyl group, m1 represents an integer of 2 to 200, m2 represents an integer of 2 to 20, and * represents a bonding position with other structures, and
the crosslinking structure includes at least one constituent unit selected from the group consisting of constituent units represented by BR-1 to BR-16,

in BR-1 to BR-16, R BR each independently represent a hydrogen atom or a methyl group, n represents an integer of 1 to 20, and * represents a bonding position with other structures.

11. The lithographic printing plate precursor according to claim 10 ,
wherein the image-recording layer further includes a binder polymer.

12. The lithographic printing plate precursor according to claim 10 , further comprising:
a protective layer on the image-recording layer.

13. The lithographic printing plate precursor according to claim 12 ,
wherein the protective layer includes an inorganic lamellar compound.

14. The lithographic printing plate precursor according to claim 10 ,
wherein a non-exposed portion of the image-recording layer can be removed by at least any of dampening water or printing ink.

15. A method for producing a lithographic printing plate comprising:
exposing the lithographic printing plate precursor according to claim 10 in an image shape and forming an exposed portion and a non-exposed portion; and
removing the non-exposed portion by supplying at least one of printing ink or dampening water.

16. A method for producing a lithographic printing plate comprising:
exposing the lithographic printing plate precursor according to claim 10 in an image shape and forming an exposed portion and a non-exposed portion; and
removing the non-exposed portion by supplying a developer having a pH of 2 or higher and 11 or lower.

Assignees

• Fujifilm Corp

Inventors

• Hirano Shuji
• Nozaki Atsuyasu

Classifications

• G03F7/00

  Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor (using photoresist structures for special production processes, see the relevant places, e.g. B44C, H10P76/00, H05K) · CPC title

• C08F222/00

  Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof · CPC title

• B41C2210/08

  Developable by water or the fountain solution · 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

• C08F212/34

  Monomers containing two or more unsaturated aliphatic radicals · CPC title