Patent ID: 7416835

Claim:
A polymerizable composition comprising: (A) a monocarboxylic acid compound which causes at least one of decarboxylation and dehydration by heat; (B) a radical initiator; (C) a compound having at least one ethylenically unsaturated bond; and (D) an infrared ray absorber, wherein the compound (A) and the radical initiator (B) are separate and distinct compounds from each other, and wherein the compound (A) is one having a group represented by the following formula: wherein A represents an aromatic group or a heterocyclic group, R 1 , R 2 , R 6 , R 7 and R 8 each independently represents a hydrogen atom or a monovalent substituent, provided that R 1 and R 2 , either one of R 1 and R 2 and A, or R 8 and Z may be taken together to form a ring structure, and Z represents a monovalent substituent.