US 6,620,861 B1 · Dental fillers

Abstract

There are provided an inorganic filler, multi-functional filler, an organic compound filler, a modified filler, and a dental coloring filler suitable in use as a filler in a dental composition, compositions having a resin matrix of an organic polymer material, as well as a process for producing the same. Disclosed are an inorganic filler which comprises an inorganic fine particle, wherein the surface of the inorganic fine particle is covered with polysiloxane. Also disclosed is a multi-functional filler which comprises an inorganic fine particle containing an acid reactive element, wherein a cement reactive phase is formed on the surface of the inorganic fine particle, and the cement reactive phase is further covered with polysiloxane. Also disclosed is an organic compound filler which comprises an organic-inorganic polymer particle or an organic polymer particle, wherein the surface of the organic-inorganic polymer particle or an organic polymer particle is covered with an inorganic film. Also, disclosed is a modified filler which comprises an inorganic fine particle, wherein the surface of the inorganic fine particle is covered with polyorganosiloxane. Also disclosed is a dental col ring filler, which comprises an inorganic particle and a coloring particle, wherein the inorganic particle and the coloring particle are unifoy mixed and dispersed, the surfaces of these particles are covered with poly(organo)siloxane. Further disclosed are dental compositions containing above fillers, and processes for producing above fillers.

Claims50

Dependent claims

An inorganic filler which comprises an inorganic fine particle having an average particle size of 0.01˜5 μm, in which the surface of the inorganic fine particle is covered with polysiloxane, wherein the polysiloxane is a condensate obtained by hydrolysis or partial hydrolysis of a silane compound represented by the general formula (I):

wherein Z is RO— or OCN—, X is halogen, Y is —OH, R is an organic group having a carbon number of 8 or less, and n, m and L are an integer of 0 to 4, provided that n+m+L=4,
wherein the inorganic fine particle is at least one selected from the group consisting of quartz, amorphous silica, aluminium silicate, aluminium oxide, titanium oxide, zirconium oxide, glasses, calcium carbonate, talc, kaolin, clay, mica, aluminium sulfate, calcium sulfate, barium sulfate, calcium phosphate, hydroxyapatite, silicon nitride, aluminium nitride, titanium nitride, silicon carbide, boron carbide, calcium hydroxide, strontium hydroxide and zeolite and wherein the glasses are selected from the group consisting of a glass prepared by a melting process, a synthetic glass prepared by a sol-gel process, and a glass produced by a vapor phase process.

An organic compound filler, which comprises an organic-inorganic polymer particle or an organic polymer particle, wherein the surface of the organic-inorganic polymer particle or the organic polymer particle is covered with a poly(organo)siloxane film, wherein the poly(organo)siloxane film is

(1) a condensate obtained at least partially hydrolyzing a silane compound represented by the general formula (I):
wherein Z is RO— or OCN—, X is halogen, Y is —OH, R is an organic group having a carbon number of 8 or less, and n, m and L are each independently an integer of 0 to 4, provided that n+m+L=4, and/or a low-condensate of the silane compound:
(2) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of an organosilane compound represented by the general formula (II):
wherein Z is R1O— or OCN—, X is halogen, Y is —OH, R1 is an organic group having a carbon number of 8 or less, R2 is an organic group, a, b and c are each independently an integer of 0 to 3, and, is an integer of 1 to 3, provided that a+b+c+p=4, and/or a low-condensate of the organosilane compound,
(3) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of a metal compound, or
(4) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of the orpanosilane compound represented by the general formula (II) and/or the low-condensate of the organosilane compound and a metal compound, wherein the poly(organo)siloxane film is at least one selected from the group consisting of (2) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I), the low-condensate of the silane compound in the presence of the organosilane compound represented by the general formula (II), and the low-condensate of the organosilane compound.

3 more elements

An organic compound filler, which comprises an organic-inorganic polymer particle or an organic polymer particle, wherein the surface of the organic-inorganic polymer particle or the organic polymer particle is covered with a poly(orpano)siloxane film, wherein the poly(orpano)siloxane film is

(1) a condensate obtained at least partially hydrolyzing a silane compound represented by the general formula (I):
wherein Z is RO— or OCN—, X is halogen, Y is —OH, R is an organic group having a carbon number of 8 or less, and n, m and L are each independently an integer of 0 to 4, provided that n+m+L=4, and/or a low-condensate of the silane compound,
(2) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of an organosilane compound represented by the general formula (II):
wherein Z is R1O— or OCN—, X is halogen, Y is —OH, R1 is an organic group having a carbon number of 8 or less, R2 is an organic group, a, b and c are each independently an integer of 0 to 3, and p is an integer of 1 to 3, provided that a+b+c+p=4, and/or a low-condensate of the organosilane compound,
(3) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of a metal compound:
or
(4) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of the organosilane compound represented by the general formula (II) and/or the low-condensate of the organosilane compound and a metal compound, wherein the poly(organo)siloxane film is (3) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of a metal compound.

4 more elements

An oroanic compound filler, which comprises an organic-inorganic polymer particle or an organic polymer particle, wherein the surface of the organic-inorganic polymer particle or the organic polymer particle is covered with a poly(organo)siloxane film, wherein the poly(organo)siloxane film is

(1) a condensate obtained at least partially hydrolyzing a silane compound represented by the general formula (I):
wherein Z is RO— or OCN—, X is halogen, Y is —OH, R is an organic group having a carbon number of 8 or less, and n, m and L are each independently an integer of 0 to 4, provided that n+m+L=4, and/or a low-condensate of the silane compound;
(2) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of an organosilane compound represented by the general formula (II):
wherein Z is R1O— or OCN—, X is halogen, Y is —OH, R1 is an organic group having a carbon number of 8 or less, R2 is an organic group, a, b and c are each independently an integer of 0 to 3, and p is an integer of 1 to 3, provided that a+b+c+p=4, and/or a low-condensate of the organosilane compound;
(3) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of a metal compound;
or
(4) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of the organosilane compound represented by the general formula (II) and/or the low-condensate of the organosilane compound and a metal compound, wherein the poly(organo)siloxane film is (4) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of the organosilane compound represented by the general formula (II) and/or the low-condensate of the organosilane compound and a metal compound.

4 more elements

A process for producing an organic compound filler, which comprises an organic-inorganic polymer particle or an organic polymer particle, wherein the surface of the organic-inorganic polymer particle or the organic polymer particle is covered with a poly(organo)siloxane film, wherein the poly(organo)siloxane film is

(1) a condensate obtained at least partially hydrolyzing a silane compound represented by the general fonnula (I):
wherein Z is RO— or OCN—, X is halogen, Y is —OH, R is an organic group having a carbon number of 8 or less, and n, m and L are each independently an integer of 0 to 4, provided that n+m+L=4, and/or a low-condensate of the silane compound;
(2) a co-condensate obtained by at least partially hydrolyzin the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of an organosilane compound represented by the general formula (II):
wherein Z is R1O— or OCN—, X is halogen, Y is —OH, R1 is an organic group having a carbon number of 8 or less, R2 is an organic group, a, b and c are each independently an integer of 0 to 3, and p is an integer of 1 to 3, provided that a+b+c+p=4, and/or a low-condensate of the organosilane compound;
(3) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of a metal compound;
or
(4) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of the organosilane compound represented by the general formula (II) and/or the low-condensate of the organosilane compound and a metal compound, which comprises:
(1) a step of preparing a dispersion by dispersing an organic-inorganic polymer particle or an organic polymer particle in an aqueous medium, (2) a step of forming a poly(organo)siloxane film on the surface of the particle in the resulting dispersion, (3) a step of heat-treating the particle having the poly(organo)siloxane film formed thereon to form a heat-treated granule after separating the particle or without separating the particle, and (4) a step of disintegrating the heat-treated granule to a primary particle.

5 more elements

A modified filler which comprises an inorganic fine particle having an average particle size of 0.01˜5 μm, wherein the surface of said inorganic fine particle is covered with polyorganosiloxane and the polyorganosiloxane is at least one selected from the group consisting of:

(1) a co-condensate obtained by hydrolysis or partial hydrolysis of a silane compound represented by the general formula (I):
wherein Z is RO— or OCN—, X is halogen, Y is —OH, R is an organic group having a carbon number of 8 or less, and n, m and L are an integer of 0 to 4, provided that n+m+L=4, and/or a low condensate of the silane compound, and an organosilane compound represented by the general formula (II):
wherein Z is R1O— or OCN—, X is halogen, Y is —OH, R1 is an organic group having a carbon number of 8 or less, R2 is an organic group, p is an integer of 1 to 3, and a, b and c are each independently an integer of 0 to 3, provided that a+b+c+p=4, and/or a low condensate of the organosilane compound, and
(2) a co-condensate obtained by at least partial hydrolysis of a silane compound represented by the general formula (I) and/or a low-condensate of the silane compound and an organosilane compound represented by the general formula (II) and/or a low condensate of the organosilane compound in the presence of a metal compound.

1 more element

A dental coloring filler, which comprises an inorganic particle and a coloring particle, wherein the inorganic particle and the coloring particle are uniformly mixed and dispersed, the surfaces of these particles are covered with poly(organo)siloxane, and the poly(organo)siloxane is

(1) a condensate obtained by at least partially hydrolyzing a silane compound represented by the general formula (I):
wherein Z is RO— or OCN—, X is halogen, Y is —OH, R is an organic group having a carbon number of 8 or less, and n, m and L are each independently an integer of 0 to 4, provided that n+m+L=4, and/or a low-condensate of the silane compound;
(2) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of an organosilane compound represented by the general formula (II):
wherein Z is R1O— or OCN—, X is halogen, Y is —OH, R1 is an organic group having a carbon number of 8 or less, R2 is an organic group, p is an integer of 1 to 3, and a, b and c are each independently an integer of 0 to 3, provided that a+b+c+p=4, and/or a low-condensate of the organosilane compound;
(3) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of a metal compound;
or
(4) a co-condensate obtained by at least partially hydrolyzing the silane compound represented by the general formula (I) and/or the low-condensate of the silane compound in the presence of the organosilane compound represented by the general formula (II) and/or the low-condensate of the organosilane compound and a metal compound.

4 more elements

Dependencies are inferred from the claim text.

Dental fillers

Life of this patent

Dental fillers

Life of this patent

Abstract

Claims50