Polymerizable composition
View Patent ↗A polymerizable composition comprising (A) a resin selected from the group consisting of a polyamide resin which is soluble or swells in water or aqueous alkali solutions and a polyester resin which is soluble or swells in water or aqueous alkali solutions, (B) an infrared absorber, (C) a radical polymerization initiator, and (D) a radical-polymerizable compound.
1. A polymerizable composition comprising
(A) a resin selected from the group consisting of a polyamide resin which is soluble or swells in water or aqueous alkali solutions and a polyester resin which is soluble or swells in water or aqueous alkali solutions,
(B) an infrared absorber,
(C) a radical polymerization initiator, and
(D) a radical-polymerizable compound,
wherein the resin (A) has carboxy groups in side chains thereof; and
wherein the resin (A) has bonds represented by one of the following formulae (II) to (V) in side chains thereof:
wherein R 5 to R 7 each independently represents a hydrogen atom or a monovalent organic group; X represents an oxygen atom, a sulfur atom, or —N(R 17 )—, in which R 17 represents a hydrogen atom or a monovalent organic group; R 8 to R 12 each independently represents a hydrogen atom or a monovalent organic group; Y represents an oxygen atom, a sulfur atom, or —N(R 18 )—, in which R 18 represents a hydrogen atom or a monovalent organic group; R 13 to R 15 each independently represents a hydrogen atom or a monovalent organic group; Z represents an oxygen atom, a sulfur atom, —N(R 19 )—, or optionally substituted phenylene, in which R 19 represents a hydrogen atom or a monovalent organic group; R 16 represents a hydrogen atom or a monovalent organic group; and A represents an optionally substituted alkylene or optionally substituted phenylene group.
2. The polymerizable composition according to claim 1 , wherein the content of carbon-carbon unsaturated bonds in the side chains of the resin (A) is 0.1 meq/g or higher.
3. The polymerizable composition according to claim 1 , wherein the content of the carbon-carbon unsaturated bonds in the side chains of the resin (A) is 0.5-3.0 meq/g.
4. The polymerizable composition according to claim 1 , wherein the resin (A) has ethylenic bonds in side chains thereof.
5. The polymerizable composition according to claim 1 , wherein the resin (A) has a weight-average molecular weight is 5,000 or higher.
6. The polymerizable composition according to claim 1 , wherein a content of the resin (A) in the polymerizable composition is 10-95% by weight.
7. The polymerizable composition according to claim 1 , wherein a content of the resin (A) in the polymerizable composition is 30-85% by weight.
8. The polymerizable composition according to claim 1 , wherein the resin (A) contains aromatic groups in an amount of 10% by weight or larger.
9. The polymerizable composition according to claim 1 , wherein the resin (A) contains aromatic groups in an amount of 20% by weight or larger.
10. The polymerizable composition according to claim 1 , wherein the ratio of the weight-average molecular weight of the resin (A) to the number-average molecular weight of the resin (A) is 1 or higher.
11. The polymerizable composition according to claim 1 , wherein the ratio of the weight-average molecular weight of the resin (A) to the number-average molecular weight of the resin (A) is 1.1 to 10.
12. A lithographic printing plate precursor comprising an image-recording layer on a support, the image-recording layer containing a polymerizable composition according to claim 1 .