Dental resin materials
AssigneeJeneric/Pentron Incorporated
InventorSamuel Waknine
Life of this patent
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Abstract
A polycarbonate dimethacrylate which is the condensation product of 2 parts of hydroxyalkylmethacrylate of the formula ##STR1## in which A is C.sub.1 -C.sub.6 alkylene, and 1 part of a bis(chloroformate) of the formula ##STR2## in which R is C.sub.2 -C.sub.5 alkylene having at least two carbon atoms in its principal chain and n is an integer from 1 to 4, is usable, admixed with a secondary monomer suitable for dental applications, such as BIS-GMA; PUDMA or the like, as an adhesive system for dental restorative materials. Particularly useful is the novel condensation product of 2-hydroxyethylmethacrylate and triethylene glycol bis(chloroformate).
Claims20
A dental resin composition which comprises:
- (A) from about 30 to about 80 weight percent of a polycarbonate dimethacrylate of the formula:
- ##STR10## wherein A is C.sub.1 -C.sub.6 alkylene, R is C.sub.2 -C.sub.5 alkylene having at least 2 carbon atoms in its principal chain and n is an integer from 1 to 4;
- (B) from about 5 to about 60 weight percent of a secondary monomer suitable for dental applications for imparting strength and rigidity to said dental resin composition, said secondary monomer being BIS-GMA;
- and
- (C) from about 0 to about 50 weight percent of a diluent monomer for decreasing the viscosity of said dental resin composition,
- wherein each of the components (A), (B), and (C) is a different monomer and such that the specific amounts within the ranges yield a 100% by weight polymerization system.
A dental resin composition which comprises:
- BIS-GMA in an amount ranging from about 20 to about 60 weight percent and a polycarbonate dimethacrylate of the formula ##STR11## wherein A is C.sub.1 -C.sub.6 alkylene, R is C.sub.2 -C.sub.5 alkylene having at least 2 carbon atoms in its principal chain and n is an integer from 1 to 4, said polycarbonate dimethacrylate being present in an amount ranging from about 40 to about 80 weight percent.
A dental resin composition comprising from about 30 to about 80 weight percent of a polycarbonate dimethacrylate of the formula:
- ##STR12## wherein A is C.sub.1 -C.sub.6 alkylene, R is C.sub.2 -C.sub.5 alkylene having at least 2 carbon atoms in its principal chain and n is an integer from 1 to 4;
- from about 5 to about 40 weight percent of BIS-GMA;
- from about 10 to about 50 of 2-hydroxyethylmethacrylate.
Dependencies are inferred from the claim text.