US4097994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental restorative composition containing oligomeric BIS-GMA resin and Michler's ketone
Assignee: Monsanto Co
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Filing: 1975-11-24
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Granted: 1978-07-04
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Expires: 1995-11-24
Abstract
Abstract A dental restorative composition and tooth coating comprising the combination of an adhesive resin of the oligomeric BIS-GMA type, a low molecular weight reactive extender or diluent acrylate, an organic peroxide catalyst or free radical initiator and, as a photosensitizer, Michler's ketone.
Inventors
- 👤 Eric T. Reaville
- 👤 Gudrun M. Streicher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:38
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/026; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; Y; Y10; Y10S; Y10S525/00; Y10S525/922; Y10S528/00; Y10S528/92; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
80 words
A photo-polymerizable composition suitable for dental restorative and tooth coating purposes comprising from about 30% to about 80% by weight of oligomeric resin having the formula ##STR5## wherein n ranges from about 1 to 10, and mixtures thereof, from about 70% to about 20% by weight low molecular weight low viscosity diluent aliphatic acrylate monomer, from about 0.5% to about 2% by weight organic peroxide free radical initiator and from about 0.25% to about 2% by weight photosensitizer comprising 4,4'-bis(dimethylamino)benzophenone.
Claim 2
Dependent Claim
80 words
A photo-polymerizable composition suitable for dental restorative and tooth coating purposes comprising from about 30% to about 80% by weight of oligomeric resin having the formula ##STR5## wherein n ranges from about 1 to 10, and mixtures thereof, from about 70% to about 20% by weight low molecular weight low viscosity diluent aliphatic acrylate monomer, from about 0.5% to about 2% by weight organic peroxide free radical initiator and from about 0.25% to about 2% by weight photosensitizer comprising 4,4'-bis(dimethylamino)benzophenone.
Claim 3
Dependent Claim
14 words
The composition of claim 1 in which n ranges from about 1 to 5.
Claim 4
Dependent Claim
13 words
The composition of claim 1 in which the diluent acrylate is methyl methacrylate.
Claim 5
Dependent Claim
13 words
The composition of claim 1 in which the organic peroxide is benzoyl peroxide.
Claim 6
Dependent Claim
27 words
The composition of claim 1 in which n ranges from about 1 to 5, the diluent acrylate is methyl methacrylate and the organic peroxide is benzoyl peroxide.
Claim 7
Dependent Claim
29 words
The composition of claim 1 in kit form suitable for use by admixture thereof in which the organic peroxide is packaged in a container separate from the oligomeric resin.
Claim 8
Dependent Claim
88 words
In the preparation of a photopolymerizable composition suitable for dental restorative and tooth coating purposes comprising a polymerizable acrylate resin, a low molecular weight low viscosity diluent aliphatic acrylate monomer, an organic peroxide free radical initiator and a photosensitizer, the improvement comprising providing as the polymerizable acrylate resin an oligomeric resin having the formula ##STR6## wherein n ranges from about 1 to 10, and mixtures thereof, and providing as the photosensitizer the compound 4,4'-bis-(dimethylamino)benzophenone, all said components being present in the relative amounts set forth in claim 1.
Claim 9
Dependent Claim
36 words
The method of treating teeth for restorative or coating purposes in the presence of oxygen comprising contacting said teeth with the composition of claim 1 and allowing said composition to cure to an essentially tack-free surface.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |