| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polymerizable composition useful as the recording layer of a negative lithographic printing original plate excellent in printing durability and raw preservability. <P>SOLUTION: The polymerizable composition contains (A) a polyurethane resin which is obtained by adding an epoxy compound having a carbon-carbon unsaturated bond to a carboxylic polyurethane resin, has a hydroxyl group and a carbon-carbon unsaturated bond in a side chain, and is soluble or swellable in water or an alkaline aqueous solution, (B) a radical initiator, (C) a polymerizable compound and (D) a sensitizing dye having a maximum absorption wavelength in a range of 350-450 nm. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
