Patent number: 6566413
Abstract: The invention relates to novel cyclic siloxane compounds of the following general formula (I):
in which:
n=0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 preferably 1, 2, 3, 4, 5;
A=H or C1-C15 alk(en)yl, C3-C15 cycloalk(en)yl, C6-C12 aryl, C8-C18 alkaryl, where, in the said radicals, in each case one or more C atoms can be replaced by O, C═O, O(C═O), SiR2 and/or NR, R being an aliphatic radical with 1 to 7 C atoms, in which one or more C atoms can be replaced by O, C═O, and/or O(C═O);
B=E or a linear, branched or polycyclic aliphatic- or aromatic-groups-containing hydrocarbon radical which links 2 to 10 of the cyclosiloxane radicals defined above, less B, to one another and contains 2 to 50 C atoms and additionally 0 to 30 other atoms from the group O, N, S, P, Si, Cl, F, Br, I and from which correspondingly 1 to 9, preferably 1 to 4 of the above defined cyclosiloxane radicals, less B, are pending;
E=A or a polymerizable group G—Q—L, where o
Type:
Grant
Filed:
September 19, 2001
Date of Patent:
May 20, 2003
Assignee:
3M ESPE AG
Inventors:
Wolfgang Weinmann, Joachim Zech, Oswald Gasser, Rainer Guggenberger, Gunther Eckhardt, Peter Bissinger, Wolfgang Soglowek