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US 2020/0206090 A1Published application
Fillers for dental restorative materials
AssigneeKerr Corporation
InventorGuigui Wang
Life of this patent
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Abstract
Described herein are directed to dental filler particles and methods of making the same. The dental filler particles include a polymer coating with a plurality of ethylenically unsaturated groups on the surface of the coating. Also described herein are dental restorative materials comprising the particles.
Claims24
A dental filler particle comprising:
- an inorganic particle;
- and
- a polymer coating on a surface of the inorganic particle, comprising structural units derived from:
- (a) a first monomer having a silane group and an ethylenically unsaturated group;
- (b) a second monomer having at least one ethylenically unsaturated group and at least one functional group selected from the group consisting of a hydroxyl group, an amino group, a carboxyl group and combinations thereof;
- and
- (c) a third monomer having at least one ethylenically unsaturated group and at least one isocyanate group,
- wherein the dental filler particle comprises a plurality of ethylenically unsaturated groups on a surface of the polymer coating.
5 more elements
A method of making dental filler particles, the method comprising:
- (a) treating inorganic particles with a first monomer having a silane group and an ethylenically unsaturated group, to provide silane-treated particles;
- (b) adding a second monomer to the silane-treated particles to form a mixture, wherein the second monomer has at least one ethylenically unsaturated group and at least one functional group selected from the group consisting of a hydroxyl group, an amino group, and a carboxyl group;
- (c) polymerizing the mixture to provide polymer-coated particles;
- and
- (d) reacting the polymer-coated particles with a third monomer having an ethylenically unsaturated group and an isocyanate group,
- to provide the dental filler particles.
3 more elements
Dependencies are inferred from the claim text.