Patent ID: 8133654

Claim:
A flexographic printing plate precursor of a laser engraving type comprising a heat-decomposable resin layer having a thickness of 0.05 to 10 mm comprising a cured laser-decomposable resin composition comprising a polymerizable compound and at least one of a polyurethane resin comprising, as a basic skeleton, a structural unit based on a reaction product of at least one diisocyanate compound represented by the formula (4) and at least one diol compound selected from the formulae (A-1) to (A-3), and polyurethane resin having a structure wherein an aromatic group is directly connected to a urethane bond and wherein an acetal site is present in a main chain: OCN—X 0 —NCO (4) HO—Ar 1 —OH (A-1) HO—(Ar 1 —Ar 2 ) m —OH (A-2) HO—Ar 1 —X—Ar 2 —OH (A-3) wherein X 0 represents a divalent organic residue; Ar 1 and Ar 2 , which may be the same or different, each represents an aromatic ring which may have a substituent selected from an alkyl group, an aralkyl group, an aryl group, an alkoxy group, an aryloxy group and a halogen atom; X represents a divalent organic residue; and m is an integer of from 1 to 3.