US4330283A
Expired / Lapsed
US
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Synthetic dental compositions for production of dental restorations, and dental restorations produced therefrom
Assignee: Dentaire Ivoclar
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Filing: 1981-02-04
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Granted: 1982-05-18
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Expires: 2001-02-04
Abstract
Abstract A synthetic dental composition for the production of a dental restorative structure, comprising at least one methacryl compound of which at least one is a polyfunctional methacrylate, and containing a catalyst, as well as dental restorative structures produced therefrom. The catalyst comprises at least one 2,2'-dialkylbenzopinacol wherein the optionally substituted alkyl group contains from 1 to 6 carbon atoms.
Inventors
- 👤 Rudy Michl
- 👤 Hanspeter Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:24
CPC Classifications
C; C08; C08F; C08F4/00; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; Y; Y10; Y10S; Y10S528/00; Y10S528/92
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
75 words
A synthetic dental composition for the production of dental restorative structures comprising (a) one or more polymerizable methacryl compounds of which at least one is a polyfunctional methacrylate, optionally in admixture with a polymerization inhibitor; or (b) a synthetic dental composition produced from (a) by polymerization, or a mixture of (a) and (b); and (c) a catalyst comprising at least one 2,2'-dialkylbenzopinacol wherein the optically substituted alkyl group contains from 1 to 6 carbon atoms.
Claim 2
Dependent Claim
75 words
A synthetic dental composition for the production of dental restorative structures comprising (a) one or more polymerizable methacryl compounds of which at least one is a polyfunctional methacrylate, optionally in admixture with a polymerization inhibitor; or (b) a synthetic dental composition produced from (a) by polymerization, or a mixture of (a) and (b); and (c) a catalyst comprising at least one 2,2'-dialkylbenzopinacol wherein the optically substituted alkyl group contains from 1 to 6 carbon atoms.
Claim 3
Dependent Claim
11 words
A composition according to claim 1, wherein the catalyst comprises 2,2'-dimethylbenzopinacol.
Claim 4
Dependent Claim
18 words
A composition according to claim 1 wherein the catalyst additionally contains 2,2'-dichlorobenzopinacol and/or benzopinacol as an additional component.
Claim 5
Dependent Claim
26 words
A composition according to claim 3, wherein the proportion of the additional component is as high as about 80 weight percent, based on the total catalyst.
Claim 6
Dependent Claim
26 words
A composition according to claim 3, wherein said additional component is present in an amount of 10 to 60 weight percent, based on the total catalyst.
Claim 7
Dependent Claim
30 words
A composition according to claim 1, wherein the catalyst is present in an amount ranging from about 0.05 to 5 weight percent, based on the polymerizable methacryl compound or compounds.
Claim 8
Dependent Claim
21 words
A composition according to claim 1, wherein the catalyst is present in an amount from about 0.2 to 1.5 weight percent.
Claim 9
Dependent Claim
43 words
A polymerizable sythetic dental composition for the production of a dental restorative structure prepared by polymerizing a composition according to claim 1 containing the component (a) or a mixture of components (a) and (b) at temperatures ranging from about 70° to 180° C.
Claim 10
Dependent Claim
32 words
A polymerizable synthetic dental composition for the production of a dental restorative structure prepared by polymerizing a composition according to claim 1, wherein the polymerization is effected at 70° to 180° C.
Claim 11
Dependent Claim
22 words
A polymerizable composition according to claim 6, which is prepared by reducing the polymerization temperature after the polymerization reaction has been initiated.
Claim 12
Dependent Claim
22 words
A dental restorative structure in the form of an artificial tooth, crown, bridge or dental prosthesis, comprising the composition of claim 1.
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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |