Photosensitizers for free radical polymerization initiation resins and method of making the same
AssigneeBisco, Inc.
InventorsH. Ralph Rawls, Yeong-Joon Park, Kyu-Ho Chae
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Abstract
A photoinitiator composition that includes (a) 1-aryl-2-alkyl-1,2-ethanedione and (b) a rigid 1,2-dione in a weight ratio of (a):(b) in a range of about 1:20 to about 20:1 is disclosed. The photoinitiator composition can be used in a photocurable dental composition in an amount sufficient to achieve a degree of double-bond conversion of at least 50%. Methods for making the photocurable dental composition are also disclosed.
Claims30
A composition for use in forming photocured dental composites, the composition comprising a mixture of:
- (a) a 1-aryl-2-alkyl-1,2-ethanedione;
- and,
- (b) a rigid 1,2-dione,
- in a weight ratio of (a):(b) in a range of about 1:20 to about 20:1.
A photocurable dental composition comprising:
- (a) a mixture of
- (i) a 1-aryl-2-alkyl-1,2-ethanedione;
- and,
- (ii) a rigid 1,2-dione,
- in a weight ratio of(i):(ii) in a range of about 1:20 to about 20:1;
- and,
- (b) at least one photopolymerizable monomer,
- wherein the mixture is present in an amount sufficient to achieve a degree of double-bond conversion of at least 50%.
A method of making a composition for use in forming photocured dental composites, the method comprising the step of combining at least one photopolymerizable monomer with a photoinitiator system comprising a mixture of (a) a 1-aryl-2-alkyl-1,2-ethanedione and (b) a rigid 1,2-dione in a weight ratio of(a):(b) in a range of about 1:20 to about 20:1, the mixture being present in an amount sufficient to achieve a degree of double-bond conversion of at least 50%.
Dependencies are inferred from the claim text.