Patent ID: 7314698

Claim:
A polymerizable composition comprising: (A) a compound including a polymerizable unsaturated group; and (B) a macromolecular compound including, at a side chain thereof, a structure represented by the following general formula (I): Z − M + General formula (I) wherein Z − represents COCOO − , COO − —, SO 3 − , or SO 2 —N − —R where R represents a monovalent organic group and M + represents an onium cation, wherein the (B) macromolecular compound including, at a side chain thereof, the structure represented by general formula (I) has a structural unit represented by the following general formula (II): wherein X represents a hydrogen atom, a monovalent organic group, a hydroxyl group, a urethane group, a urea group, a halogen atom, an amino group, an amide group, a sulfonyl group or a sulfonate group, Y represents a divalent organic connecting group, n denotes 0 or 1, Z − represents COCOO − , COO − , SO 3 − or SO 2 —N − —R where R represents a monovalent organic group and M + is an onium cation.