Patent ID: 7179582

Claim:
A radical polymerizable composition comprising (A) an alkali-soluble resin containing a radical polymerizable group, (B) a radical polymerizable compound, and (C) a radical initiator, wherein the crosslinking reactivity of a polymerizable group of the polymerizable compound (B) to a polymerizable group of the polymerizable compound (B) is larger than the crosslinking reactivity of a polymerizable group of the polymerizable compound (B) to a radical polymerizable group of the alkali-soluble resin (A), and the crosslinking reactivity of a radical polymerizable group of the alkali-soluble resin (A) to a polymerizable group of the polymerizable compound (B) is larger than the crosslinking reactivity of a radical polymerizable group of the alkali-soluble resin (A) to a radical polymerizable group of the alkali-soluble resin (A), and wherein the combination of polymerizable group (B)/polymerizable group (A) in radical polymerizable compound (B)/polymerizable alkali-soluble resin (A) is selected from the group consisting of acrylate/crotonate, methacrylate/crotonate, and methacrylate/itaconate.