A dental composition comprising a polymerizable acidic compound of the following formula (I):
wherein
R1 which may be the same or different when more than one R1 is present, represents a hydrogen atom or a methyl group;
R2 which may be the same or different when more than one R2 is present, represents a hydrogen atom, a straight-chain or branched C1-6 alkyl group, a C3-8 cycloalkyl group or a straight-chain or branched C2-6 alkenyl group;
R3 which may be the same or different when more than one R3 is present, represents a monovalent organic moiety substituted by a group selected from —COOM, —PO3M, —O—PO3M2 and —SO3M, wherein M independently represents a hydrogen atom or a metal atom; or
R2 and R3
form together a divalent organic moiety substituted by a group selected from —COOM, —PO3M, —O—PO3M2 and —SO3M, wherein M independently represents a hydrogen atom or a metal atom;
L represents a (m+n+1)-valent organic linker group;
X represents a hydrogen atom or a group selected from —COOM, —PO3M, —O—PO3M2 or —SO3M, wherein M independently is a hydrogen atom or a metal atom;
m is an integer of 0 to 6;
n is an integer of 0 to 6;
wherein (m+n) is at least 2;
provided that when n is 0, then X cannot be a hydrogen atom.
一种牙科组合物,包含下式(I)的可聚合酸性化合物:
其中
R1 代表氢原子或甲基,当存在一个以上 R1 时,R1 可以相同或不同;
代表氢原子、直链或支链 C1-6 烷基、C3-8 环烷基或直链或支链 C2-6 烯基;
R3 可以相同,也可以不同,当存在多个 R3 时,代表被选自 -COOM、-PO3M、-O-PO3M2 和 -SO3M 的基团取代的一价有机分子,其中 M 独立地代表氢原子或
金属原子;或
R2 和 R3
共同形成被选自-COOM、-PO3M、-O-PO3M2 和-SO3M 的基团取代的二价有机分子,其中 M 独立地代表氢原子或
金属原子;
L 代表(m+n+1)价有机连接基团;
X 代表氢原子或选自 -COOM、-PO3M、-O-PO3M2 或 -SO3M 的基团,其中 M 独立地代表氢原子或
金属原子;
m 是 0 至 6 的整数;
n 是 0 至 6 的整数;
其中 (m+n) 至少为 2;
但当 n 为 0 时,X 不能为氢原子。