US4457818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental compositions from urethane acrylate, diacrylate monomer, camphorquinone and dimethylaminoethyl methacrylate
Assignee: Syngenta Ltd
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Filing: 1979-12-04
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Granted: 1984-07-03
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Expires: 1999-12-04
Abstract
Abstract The invention relates to a dental composition which is suitable as a fissure sealant, dental glaze, bonding agent or orthodontic adhesive and which is a mixture of a selected vinyl urethane prepolymer, selected comonomer, and visible light cure catalyst comprising an organic amine and selected alpha -diketone.
Inventors
- 👤 Robert Denyer
- 👤 Michael S. Fortuin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:13
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/20; Y; Y10; Y10S; Y10S525/00; Y10S525/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A liquid dental composition which comprises (A) 50 to 55 parts by weight of polymerisable vinyl urethane prepolymer which is the reaction product of a urethane prepolymer derived from the reaction of hexamethylene diisocyanate and propoxylated bisphenol A, and hydroxypropyl methacrylate, (B) 50 to 45 parts by weight of at least one glycol methacrylate selected from ethylene glycol dimethacrylate and triethylene glycol dimethacrylate, (C) 0.25 to 0.75 parts by weight per 100 parts by weight A+B of dimethylaminoethyl methacrylate, and (D) 0.5 to 1.0 parts by weight per 100 parts by weight A+B of camphorquinone.
Claim 2
Dependent Claim
95 words
A liquid dental composition which comprises (A) 50 to 55 parts by weight of polymerisable vinyl urethane prepolymer which is the reaction product of a urethane prepolymer derived from the reaction of hexamethylene diisocyanate and propoxylated bisphenol A, and hydroxypropyl methacrylate, (B) 50 to 45 parts by weight of at least one glycol methacrylate selected from ethylene glycol dimethacrylate and triethylene glycol dimethacrylate, (C) 0.25 to 0.75 parts by weight per 100 parts by weight A+B of dimethylaminoethyl methacrylate, and (D) 0.5 to 1.0 parts by weight per 100 parts by weight A+B of camphorquinone.
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) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |