| 摘要 |
Dental composition comprising
(a) one or more di- or polyepoxides having 2 to 5 epoxide groups and having a molecular weight of from 200 to 700 Da, or a macromonomeric reaction product obtainable by reacting the diepoxide with a dicarboxylic acid in a molar ratio [diepoxide]/[dicarboxylic acid] of at least 2;
(b) one or more primary monoamines and/or disecondary diamines;
(c) optionally one or more aliphatic polyamines;
(d) a particulate filler,
wherein the molar ratio of epoxide groups in component (a) to the N-H bonds in component (b) and (c) [epoxide (a) ]/[N-H (b),(c) ] is in the range of from 0.9 to 1.1;
wherein the di- or polyepoxide having 2 to 5 epoxide groups is a compound of the following formula (I):
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ A(BZ m ) n €ƒ€ƒ€ƒ€ƒ€ƒ(I)
wherein
A
represents an n-valent organic moiety optionally having 1 to 10 heteroatoms selected from oxygen atoms and sulfur atoms; and
B
represents an m+1-valent organic moiety,
Z
is an epoxide group which may have a substituent,
m
which are independent from each other represent an integer of at least 1; and
n
is an integer of from 1 to 5;
wherein the m are selected so that 2 to 5 epoxide groups are present;
wherein the composition does not contain any 2,2-bis-(4-hydroxyphenyl)-propane, or 2,2-bis-(4-hydroxyphenyl)-methane. |
