Ternary photoinitiator system for curing of epoxy/polyol resin composition
Assignee3M Innovative Properties Company
InventorsJoel D. Oxman, Dwight W. Jacobs
Life of this patent
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Abstract
Photocurable, addition polymerizable compositions contain an epoxy resin and a photoinitiator system containing (a) an epoxy resin, (b) a hydroxyl containing material and (c) a photoinitiator system comprising: (i) an iodonium salt; (ii) a visible light sensitizer; and (iii) an electron donor compound, wherein the photoinitiator system has a photoinduced potential of at least about 100 mV relative to a standard solution of 2.9×10−5 moles/g diphenyl iodonium hexafluoroantimonate and 1.5×10−5 moles/g camphorquinone in 2-butanone. The compositions cure on exposure to light in the visible spectrum and are useful in a variety of applications, including dental adhesives and composites.
Claims9
A photopolymerizable composition comprising:
- (a) a blend of epoxy resins comprising:
- (i) a cycloaliphatic epoxide;
- and
- (ii) an epoxide that is different than the cycloaliphatic epoxide, and which is selected from the group consisting of aliphatic epoxide, aromatic epoxide, and mixtures thereof;
- (b) a hydroxyl-containing material;
- and
- (c) a photoinitiator system comprising:
- (i) an iodonium salt;
- (ii) a visible light sensitizer;
- and
- (iii) an electron donor compound, wherein the photoinitiator system has a photoinduced potential greater than or equal to that of 3-dimethylaminobenzoic acid in a standard solution of 2.9×10−5 moles/g diphenyl iodonium hexafluoroantimonate and 1.5×10−5 moles/g camphorquinone in 2-butanone.
A photopolymerizable composition comprising:
- (a) an epoxy resin;
- (b) a hydroxyl-containing material;
- and
- (c) a photoinitiator system comprising:
- (i) an iodonium salt;
- (ii) a visible light sensitizer;
- and
- (iii) an electron donor compound, wherein the photoinitiator system has a photoinduced potential greater than or equal to that of 3-dimethylaminobenzoic acid in a standard solution of 2.9×10−5 moles/g diphenyl iodonium hexafluoroantimonate and 1.5×10−5 moles/g camphorquinone in 2-butanone;
- wherein the composition provides a photocurable adhesive or a photocurable composite.
A photopolymerizable composition comprising:
- (a) an epoxy resin;
- (b) a hydroxyl-containing material;
- and
- (c) a photoinitiator system comprising:
- (i) an iodonium salt;
- (ii) a visible light sensitizer, and
- (iii) an electron donor compound, wherein the photoinitiator system has a photoinduced potential greater than or equal to that of 3-dimethylaminobenzoic acid in a standard solution of 2.9×10−5 moles/g diphenyl iodonium hexafluoroantimonate and 1.5×10−5 moles/g camphorquinone in 2-butanone;
- wherein the composition is polymerizable into a dental prosthesis.
Dependencies are inferred from the claim text.