Photocurable materials for the production of dental prostheses and devices
AssigneePac-Dent, Inc.
InventorsMinhdang Son Nguyen, Daniel Wang
Life of this patent
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Abstract
A resin based material whose composition includes a light-curable mixture of monomers of no more than 35 wt. % of an ethoxylated difunctional bisphenol A dimethacrylate; of no more than 10 wt. % of a methacrylate monomer; of no more than 10 wt. % of a difunctional urethane acrylate; of no more than 0.1 wt. % of an optical brightener; of no more than 5 wt. % of silica particles having methacrylate functionalization layers and having an average particle size of less than about 200 nm; of having more than 40 wt. % of an inert glass; of no more than 15 wt. % of a heavy metal oxide; of no more than 2.5 wt. % of an ultraviolet/visible (UV/Vis) light-photo-polymerization initiator; a colorant; and a stabilizer.
Claims18
A photocurable material comprising:
- an ethoxylated difunctional bisphenol A dimethacrylate, not exceeding 35 wt. % of the photocurable material;
- a methacrylate monomer, not exceeding 10 wt. % of the photocurable material;
- a difunctional urethane acrylate not exceeding 10 wt. % of the photocurable material;
- an optical brightener not exceeding 0.1 wt. % of the photocurable material;
- filler material comprising:
- silica particles having methacrylate functionalization layers and having an average particle size of less than about 200 nm, said silica particles not exceeding 5 wt. % of the photocurable material;
- an inert glass in an amount exceeding 40 wt. % of the photocurable material;
- a heavy metal oxide not exceeding 15 wt. % of the photocurable material;
- and
- an ultraviolet/visible (UV/Vis) light-photo-polymerization initiator not exceeding 2.5 wt. % of the photocurable material;
- wherein
- the filler material comprises a first plurality of particles with sizes in the range of 10 to 20 microns, a second plurality of particles with sizes in the range of 5 to 10 microns, and a third plurality of particles with sizes smaller than 5 microns.
A photocurable material comprising:
- an ethoxylated difunctional bisphenol A dimethacrylate, not exceeding 35 wt. % of the photocurable material;
- a methacrylate monomer, not exceeding 10 wt. % of the photocurable material;
- a difunctional urethane acrylate not exceeding 10 wt. % of the photocurable material;
- an optical brightener not exceeding 0.1 wt. % of the photocurable material;
- filler material comprising:
- silica particles having methacrylate functionalization layers and having an average particle size of less than about 200 nm, said silica particles not exceeding 5 wt. % of the photocurable material;
- an inert glass in an amount exceeding 40 wt. % of the photocurable material;
- a heavy metal oxide not exceeding 15 wt. % of the photocurable material;
- and
- an ultraviolet/visible (UV/Vis) light-photo-polymerization initiator not exceeding 2.5 wt. % of the photocurable material;
- wherein
- the inert glass of the filler material comprises a first plurality of inert glass particles with sizes in the range of 10 to 20 microns, a second plurality of inert glass particles with sizes in the range of 5 to 10 microns, and a third plurality of inert glass particles with sizes smaller than 5 microns.
Dependencies are inferred from the claim text.