| abstract |
Disclosed is a polymerizable composition useful as an image recording material for a negative planographic printing plate precursor having excellent sensitivity and storage stability. The method includes (A) a compound that is decarboxylated and / or dehydrated by heat, (B) a radical initiator, (C) a compound having an ethylenically unsaturated bond, and (D) an infrared absorber. It is characterized by doing. (A) As a compound to be decarboxylated and / or dehydrated by heat, a monocarboxylic acid compound represented by the following general formula (I-2) is preferable, and in formula (I-2), A represents an aromatic group or a heterocyclic ring. Represents a group. X represents —O—, —S—, —SO 2 —, —NH—, —N (R 3 ) —, —CH 2 —, —CH (R 4 ) — and —C (R 4 ) (R 5. )-Represents a divalent linking group selected from-, R 3 , R 4 or R 5 each independently represents a hydrogen atom or a monovalent substituent. [Chemical 1] [Selection figure] None |