| 摘要 |
Dental composite comprising
(i) a polymerizable composition obtainable by reacting a mixture comprising:
(a) x equivalents of one or more compounds of the following formula (I):
wherein
L' is an (I+1)-valent hydrocarbon group which may contain in its backbone 1 to 3 heteroatoms selected from oxygen atoms and sulfur atoms and which may be substituted by one or more hydroxyl groups or groups -COOL" wherein L" is a polymerizable moiety;
I is an integer of from 1 to 3;
(b) y equivalents of one or more compounds of the following formula (IIa), (IIb) and/or (IIc):
wherein
n
is an integer of from 1 to 3,
Y
may be present or absent, and when present represents a carbonyl group;
Y'
independently may be present or absent, represents a carbonyl group;
R m
which may be the same or different represent 1 to 3 substituents selected from halogen atoms, alkyl groups, and alkoxy groups, or wherein two R m form together with the carbon atoms of the ring to which they are bonded an annelated aromatic ring; and
(c) z equivalents of one or more compounds of the following formula (III):
wherein
R 1
is a hydrogen atom or an alkyl group;
k
is an integer of from 1 to 3, whereby
when k is 1, 2 or 3, then L is a (k+1)-valent hydrocarbon group which may contain 1 to 3 heteroatoms selected from oxygen atoms and sulfur atoms, and X is a carboxylic acid group, or a hydroxyl group bonded to an aromatic ring forming part of L; or
wherein 0.05 ‰¤ x/y ‰¤ 0.66, and 2y - f x ‰¤ z ‰¤ 1.5(2y - f x),
wherein x, y, and z are the molar equivalents of components (a), (b) and (c) and f is the mean acid functionality of component (a) : f €¾ = ˆ‘ l = 1 3 x l x �¢ l + 1 wherein I is as defined in formula (I); and optionally reacting the hydroxyl groups and/or carboxylic acid groups on L' of the reaction product of the mixture with a compound having a polymerizable double bond; and
(ii) a particulate filler. |
