Dental visible light curable epoxy system with enhanced depth of cure
AssigneeMinnesota Mining and Manufacturing Company
InventorsDavid A. Kaisaki, Sumita B. Mitra, William J. Schultz, Robert J. DeVoe
Life of this patent
Estimating the term…
Abstract
A visible-light photopolymerizable composition comprising a) a cationically polymerizable epoxy resin, b) a hydroxyl-containing material c) an aryliodonium salt and d) a visible light sensitizer that is an alpha-dicarbonyl compound having an extinction coefficient less than about 1000. Particularly preferred compositions of the present invention are dental materials.
Claims36
A visible-light photopolymerizable dental composition useful for polymerization in the oral environment comprising:
- a) a cationically polymerizable epoxy resin,
- b) a hydroxyl-containing material having no additional functionality or a hydroxyl-containing material that contains other functionalities that do not substantially interfere with cationic cure at room temperature,
- c) an aryliodonium salt,
- d) a visible light sensitizer having an extinction coefficient less than about 1000 lm.sup.-1 cm.sup.-1 in the visible light range and having a Sensitizer Test pH of less than about 3, and
- e) a dental filler present in the composition as at least about 50% by weight of the total composition;
- wherein the components of said composition are present in amounts sufficient to provide cure of said composition resin by exposure to visible light to a cure depth of at least about 1 mm.
A visible-light photopolymerizable dental composition useful for polymerization in the oral environment comprising:
- a) a cationically polymerizable epoxy resin,
- b) a hydroxyl-containing material that does not substantially interfere with cationic cure at room temperature,
- c) an aryliodonium salt, and
- d) a visible light sensitizer having an extinction coefficient less than about 1000 lm.sup.-1 cm.sup.-1 in the visible light range and having a Sensitizer Test pH of less than about 3;
- wherein the components of said composition are present in amounts sufficient to provide cure of said photopolymerizable resin by exposure to visible light to a cure depth of at least about 1 mm.
Dependencies are inferred from the claim text.