Patent ID: 7632912

Claim:
An acid modified epoxymethacrylate compound obtained by reacting an epoxy (meth)acrylate represented by the formula (16), wherein R 1 is a hydrogen atom or a methyl group, —(O—X—O)— is represented by the formula (11) in which R 2 , R 3 , R 8 and R 9 are the same or different and are a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group, R 4 , R 5 , R 6 and R 7 are the same or different and are a hydrogen atom, a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group and A is a linear, branched or cyclic hydrocarbon having 20 or less carbon atoms, —(Y—O)— is an arrangement of one kind of structure defined by the formula (12) or a random arrangement of two or more kinds of structures defined by the formula (12) in which R 10 and R 11 are the same or different and are a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group and R 12 and R 13 are the same or different and are a hydrogen atom, a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group, each of a and b is 0 or an integer of 1 to 300, provided that at least either a or b is not 0, and each of c and d is 0 or an integer of 1, and Z is an organic group which has one or more carbon atoms and optionally contains an oxygen atom, and n is 0 or an integer of 1 to 10, with a carboxylic acid or a carboxylic anhydride.