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US4188317A
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Dental restorative compositions containing titanium silicate
Assignee: Colgate Palmolive Co
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Filing: 1978-07-28
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Granted: 1980-02-12
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Expires: 1998-07-28
Abstract
Abstract Titanium silicate is used as the filler for dental restorative composites, especially dental restoratives cements, in combination with a conventional liquid polymerizable binder system, especially BIS-GMA combined with one or more dimethacrylates. The composite compositions possess improved mechanical properties, especially compressive strength, as well as a low coefficient of thermal expansion.
Inventors
- 👤 Samuel C. Temin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:13
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
42 words
In a dental restorative composite composition, which is a mixture of a finely divided, inert inorganic filler and a liquid polymerizable resin binder system, the improvement comprising, as at least the major portion of said finely divided inert inorganic filler, titanium silicate.
Claim 2
Dependent Claim
42 words
In a dental restorative composite composition, which is a mixture of a finely divided, inert inorganic filler and a liquid polymerizable resin binder system, the improvement comprising, as at least the major portion of said finely divided inert inorganic filler, titanium silicate.
Claim 3
Dependent Claim
30 words
The composite of claim 1, wherein the titanium silicate filler has an average particle size in the range of from less than about 1 micron up to about 10 microns.
Claim 4
Dependent Claim
27 words
The composite of claim 1, wherein the titanium silicate filler has an average particle size in the range of from about 1.1 microns to about 3.5 microns.
Claim 5
Dependent Claim
21 words
The composite of claim 1, wherein the finely divided, inert inorganic filler comprises at least 65% by weight of titanium silicate.
Claim 6
Dependent Claim
17 words
The composite of claim 1, wherein the finely divided, inert inorganic filler consists solely of titanium silicate.
Claim 7
Dependent Claim
21 words
The composite of claim 1, wherein the ratio of filler to binder is from about 1:1 to about 6:1 by weight.
Claim 8
Dependent Claim
20 words
The composition of claim 1 wherein the resin binder system includes the reaction product of bisphenol A and glycidyl methacrylate.
Claim 9
Dependent Claim
13 words
The composition of claim 7 wherein the resin binder further contains hexamethylene dimethacrylate.
Claim 10
Dependent Claim
35 words
The composition of claim 7 wherein the inorganic filler comprises at least 65% by weight of titanium silicate of an average particle size of from less than about 1 micron up to about 10 microns.
Claim 11
Dependent Claim
24 words
The composition of claim 9 which further contains a methacrylate selected from the group consisting of di- , tri, and tetra-methacrylates and mixtures thereof.
References Cited (Backward Citations)
US3709866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |