Lithographic printing plate precursor and polymerizable composition
View Patent ↗A polymerizable composition containing: (A) a polyurethane compound soluble or swellable in water or an aqueous alkali solution which is obtained by reacting at least one diol compound having an unsaturated bond in a main chain and having a molecular weight of 500 or more with at least one polyisocyanate compound; (B) a radical initiator; and (C) a photothermal converting agent, and a polymerizable composition containing: (A′) a polyurethane resin which is soluble or swellable in water or an aqueous alkali solution and has an unsaturated carbon-carbon bond in its side chain; and (B) a radical initiator, wherein the polyurethane resin (A′) is obtained by adding an epoxy compound having an unsaturated carbon-carbon bond to a polyurethane resin having carboxyl group.
1. A lithographic printing plate precursor comprising a support and a recording layer, the recording layer containing:
(A) a polyurethane compound soluble or swellable in water or an aqueous alkali solution which is obtained by reacting at least one polyolefin diol compound having an unsaturated bond in a main chain and having a molecular weight of 500 or more with at least one polyisocyanate compound; and
(B) a radical initiator.
2. The lithographic printing plate precursor according to claim 1 , wherein the recording layer further containins (D) a polymerizable compound.
3. The lithographic printing plate precursor according to claim 1 , wherein the polyurethane compound (A) has 0.4 meq/g or more of a carboxyl group in its side chain.
4. The lithographic printing plate precursor according to claim 1 , wherein the at least one polyolefin diol compound is selected from the group consisting of a polybutadiene diol and a polyisoprene diol.
5. A polymerizable composition containing:
(A) a polyurethane compound soluble or swellable in water or an aqueous alkali solution which is obtained by reacting at least one polyolefin diol compound having an unsaturated bond in a main chain and having a molecular weight of 500 or more with at least one polyisocyanate compound;
(B) a radical initiator; and
(C) an infrared absorbing agent.
6. The polymerizable composition according to claim 5 , further containing (D) a polymerizable compound.
7. The polymerizable composition according to claim 5 , wherein the polyurethane compound (A) has 0.4 meq/g or more of a carboxyl group in its side chain.
8. The lithographic printing plate precursor according to claim 5 , wherein the at least one polyolefin diol compound is selected from the group consisting of a polybutadiene diol and a polyisoprene diol.
9. A polymerizable composition containing:
(A′) a polyurethane resin which is soluble or swellable in water or an aqueous alkali solution and has a hydroxyl group and an unsaturated carbon-carbon bond in its side chain; and
(B) a radical initiator,
wherein the polyurethane resin (A′) is obtained by adding an epoxy compound having an unsaturated carbon-carbon bond to a polyurethane resin having carboxyl group.
10. The polymerizable composition according to claim 9 , further containing (D) a polymerizable compound.
11. The polymerizable composition according to claim 9 , further containing (C) an infrared absorbing agent.
12. The polymerizable composition according to claim 9 , wherein the polyurethane resin (A′) has 0.4 meq/g or more of a carboxyl group in its side chain.