Tertiary aromatic amine accelerators derived from para-aminophenethanol
AssigneeAmerican Dental Association Health Foundation
InventorHarold Argentar
Life of this patent
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Abstract
Tertiary aromatic amines derived from para-aminophenethanol act as accelerators for the peroxide catalyzed polymerization of vinyl monomers, especially methacrylates and acrylates, and for the curing of unsaturated polyesters. The amines are characterized by generally high reactivity and low toxicity, and by their yielding polymers of high strength and low color, and are thereby particularly suited for use in polymerizable or curable formulations employed in the filling and restoration of human teeth, in the preparation of cold-curing denture base materials for fabricating or repairing dentures and in the cementing of bone.
Claims12
A composition of matter comprising (1) a component selected from the group consisting of polymerizable vinyl monomers and unsaturated polyesters, (2) a peroxide catalyst, and (3) a tertiary aromatic amine having the following structure:
- ##STR22## where R.sub.1 and R.sub.2 are the same or different and are selected from the following groups:
- (a) --CH.sub.3,
- (b) --CH.sub.2 CH.sub.2 C.sub.n H.sub.2n+1 with n varying between 0 and 18, ##STR23## where R.sub.1 ', R.sub.2 ' and R.sub.3 ' are each either hydrogen, normal alkyl, --C.sub.n H.sub.2n+1, with n varying between 1 and 20, or t-butyl, but if one R' is t-butyl, then the adjacent R' is hydrogen, ##STR24## where R.sub.1 " is --C.sub.n H.sub.2n+1 with n varying from 0 to 17, or (f) --CH.sub.2 CH.sub.2 OH;
- and where R.sub.3 is either hydrogen, or a lower normal alkanoyl group, ##STR25## with n varying between 1 and 20, or ##STR26## wherein R is hydrogen or a methyl group;
- or (B) a polymeric amine having 10 or fewer amine groups which is the reaction product of the amine ##STR27## in which R.sub.1 and R.sub.2 are each hydrogen and R.sub.3 is as defined in (A), with the diglycidyl ether of bisphenol A, viz., ##STR28## where n varies between 1 and 10, or the hydrolysis product of this polymeric amine, viz., ##STR29## (C) an amine having the formula ##STR30## with n varying between 1 and 10, where R.sub.1 and R.sub.2 are as defined in (A) or are of the formula ##STR31## and where R.sub.3 is as defined in (A);
- or (D) a polymeric amine having 10 or fewer amine groups which is the reaction product of the amine (B) with methacrylic or acrylic acid;
- or
- (E) an amine having the formula ##STR32## where R.sub.1 and R.sub.2 are as defined in (A) but with no greater than 5 carbon atoms in the alkyl substituents of R.sub.1 and R.sub.2, and where n varies between 2 and 10;
- or
- (F) an amine having the formula ##STR33## where R.sub.1 and R.sub.2 are as defined in (A), and where n varies between 2 and 10.
Dependencies are inferred from the claim text.