Patent ID: 6949667

Claim:
An alkenylphosphonic acid ester compound of the following general formula (I): R 1 CH═CR 2 [P(O)(OCR 3 R 4 CR 5 R 6 0 )] (I) wherein R 1 and R 2 each stand for a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, a heteroaryl group, an alkenyl group, an alkoxy group, an aryloxy group or a silyl group, provided that R 1 does not stand for a hydrogen atom or a methyl group, and R 3 , R 4 , R 5 and R 6 each stand for a hydrogen atom, an alkyl group, a cycloalkyl group, an aralkyl group or an aryl group.