# US 5,708,051 A · Polymerizable dental material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,708,051 A - Document ID: US5708051A - Status: Granted - Kind: A - Application number: 08/574,522 - Filed: 1995-12-19 - Granted: 1998-01-13 - Earliest claimed: 1994-12-23 - Assignees: Heraeus Kulzer GmbH - Inventors: Albert Erdrich; Michael Eck; Kurt Reischl; Slawomira Weber-Pelka - Web page: https://patentgrep.com/patent/US5708051A ## CPC - A61K 6/887: Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds - A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D) ## Abstract A dental material that contains di- and poly(meth)acrylates and an inorganic filler in the form of a finely divided synthetic crystalline silicic acid with a sheet structure and optionally a very finely ground glass. ## Claims ### Claim 1 In an improved polymerizable dental material of the type containing monomeric (meth)acrylate, a finely divided inorganic filler, and a polymerization catalyst, the improvement wherein the inorganic filler consists essentially of 5 to 100% by weight of finely divided synthetic crystalline silicic acid with a sheet structure and of 0 to 95% by weight of very finely ground glass; wherein the finely divided silicic acid having a sheet structure, has a particle size distribution ranging from 1 to 40 .mu.m and a mean particle size of approximately 4 .mu.m; the very finely ground glass has a particle size distribution ranging from 0.1 to 5 .mu.m and a mean particle size of approximately 0.7 .mu.m; and the finely divided silicic acid has an overall composition H.sub.2 Si.sub.x O.sub.2x+1, wherein x denotes a number between 15 and 24, which exhibits a very strong first line in the X-ray diffraction pattern at (3.42.+-.0.1).multidot.10.sup.-8 cm and a further line at (18.+-.4).multidot.10.sup.-8 cm, the intensity of which is not more than 75% of the intensity of the first line, and which has a titratable acidity of 83 to 130 mmol of H+/mol of SiO.sub.2. ### Claim 2 (depends on 1) The dental material as claimed in claim 1, containing 20 to 80% by weight of the inorganic filler. ### Claim 3 (depends on 1) The dental material as claimed in claim 1, containing 40 to 75% by weight of the inorganic filler. ### Claim 4 (depends on 1) The dental material as claimed in claim 1, containing 40 to 55% by weight of the inorganic filler consisting entirely of finely divided synthetic crystalline silicic acid with a sheet structure. ### Claim 5 (depends on 1) The dental material as claimed in claim 1 containing 60 to 75% by weight of the inorganic filler consisting essentially of a mixture of 5 to 50% by weight of finely divided synthetic crystalline silicic acid with a sheet structure and 50 to 95% by weight of very finely ground glass. ### Claim 6 (depends on 5) The dental material as claimed in claim 5, wherein the mixture consists of 10-30% by weight of finely divided crystalline silicic acid with a sheet structure and 70 to 90% by weight of very finely ground glass. ### Claim 7 (depends on 1) The dental material as claimed in claim 1, containing glass with an index of refraction of 1.46 to 1.53. ### Claim 8 (depends on 1) The dental material as claimed in claim 1, wherein the glass is a barium-aluminum borosilicate glass. ### Claim 9 (depends on 1) The dental material as claimed in claim 1, wherein the finely divided silicic acid and the very finely ground glass have been silanized. ### Claim 10 (depends on 9) The dental material as claimed in claim 9, wherein the monomeric (meth)acrylate is at least one di(meth)acrylate selected from the group consisting of diurethanedi(meth)acrylate of 2, 2, 4-trimethylhexamethylene di-isocyanate and 2-hydroxyethyl(meth)acrylate, diurethane di(meth)acrylate of bis-(di-isocyanatomethyl)-tricyclodecane and 2-hydroxyethyl(meth)acrylate, decanediol di(meth)acrylate, dodecanediol di(meth)acrylate, tri-ethyleneglycol di(meth)acrylate, bis-(4-(2-hydroxy-3-methacryloyloxypropoxy)-phenyl)-dimethyl methane, and bis-(4-(2-hydroxy-3-acryloyloxypropoxy)-phenyl)-dimethyl methane, and at least one polyfunctional (meth)acrylate selected from the group consisting of tri(meth)acryloyloxyethoxytrimethylol propane, tetra(meth)acryloyloxyethoxy penta-erythritol, tetra(meth)acryloyloxy-isopropoxy penta-erythritol, and hexa(meth)acryloyloxyethoxy dipenta-erythritol. ### Claim 11 (depends on 10) The dental material as claimed in claim 10, wherein the monomeric (meth)acrylate consists of 5 to 60% by weight of monomeric poly(meth)acrylate. ### Claim 12 (depends on 11) The dental material as claimed in claim 11, wherein the monomeric (meth)acrylate consists of 30 to 60% by weight of monomeric poly(meth)acrylate. ### Claim 13 (depends on 2) The dental material as claimed in claim 2, wherein the silicic acid and the glass have been silanized and wherein the monomeric (meth)acrylate is at least one di(meth)acrylate selected from the group consisting of diurethanedi(meth)acrylate of 2,2,4-trimethylhexamethylene di-isocyanate and 2-hydroxyethyl(meth)acrylate, diurethane di(meth)acrylate of bis-(di-isocyanatomethyl)-tricyclodecane and 2-hydroxyethyl(meth)acrylate, decanediol di(meth)acrylate, dodecanediol di(meth)acrylate, tri-ethyleneglycol di(meth)acrylate, bis-›4-(2-hydroxy-3-methacryloyloxypropoxy)-phenyl!-dimethyl methane, and bis-›4-(2-hydroxy-3-acryloyloxypropoxy)-phenyl!-dimethyl methane, and at least one polyfunctional meth(acrylate) selcted from the group consisting of tri(meth)acryloyloxyethoxytrimethylol propane, tetra(meth)acryloyloxyethoxy penta-erythritol, tetra(meth)acryloyloxy-isopropoxy penta-erythritol, and hexa(meth)acryloyloxyethoxy dipenta-erythritol and wherein the monomeric (meth)acrylate consists of 5 to 60% by weight of monomeric poly(meth)acrylate. ### Claim 14 (depends on 13) The dental material as claimed in claim 13, wherein the glass is a barium-aluminum borosilicate glass. ### Claim 15 (depends on 13) The dental material as claimed in claim 13 wherein the inorganic filler consists essentially of the silicic acid. ### Claim 16 (depends on 13) The dental material as claimed in claim 13 wherein the inorganic filler consists essentially of 5 to 50% by weight of the silicic acid the remainder being the glass. ### Claim 17 (depends on 13) The dental material as claimed in claim 13 wherein the inorganic filler consists essentially of 5 to 100% of the silicic acid the remainder being the glass.