Novel acrylic ester phosphonic acids for use in dental materials e.g. cements or adhesives comprise improved hydrolytic stability

摘要

Acrylic ester phosphonic acids and their stereoisomers and mixtures are new. Novel acrylic ester phosphonic acids are of formula (I), their stereoisomers and mixtures also being new. R1 when n=1 = group of formula (A) or (B); R1 when n=2 = group of formula (C)-(E); R2 = 1-12C alkylene, 4-8C cycloalkylene or 7-15C alkylenephenylene; R3 = H, 1-5C alkyl or 1-5C O-alkyl; and R4 and R5 = 1-5C alkyl or 1-5C O-alkyl. An Independent claim is also included for compositions containing (I).