US4131729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental compositions comprising acrylic esters of tricyclo [5.2.1.02,6 ] decane polymers
Assignee: THERA-PATENT GmbH and Co KG
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Filing: 1978-04-21
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Granted: 1978-12-26
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Expires: 1998-04-21
Abstract
Abstract An improved dental composition having shortened hardening time and after hardening increased compressive strength and abrasion resistance, including a radical-inducing compound and a polymerizable acrylic or methacrylic acid ester or diester compound with at least 20 percent by weight of the polymerizable compound being the diacrylic or dimethacrylic acid ester of bishydroxymethyltricyclo [5.2.1.0 2 ,6 ]-decane. Other monofunctional or difunctional acrylic or methacrylic acid esters as well as fillers, pigments and stabilizers can be included.
Inventors
- 👤 Werner Schmitt
- 👤 Robert Purrmann
- 👤 Peter Jochum
- 👤 Wolf-Dietrich Zahler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:26
CPC Classifications
C; C08; C08F; C08F120/00; C08F120/02; C08F120/10; C08F120/26; C08F120/30; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; Y; Y10; Y10S; Y10S522/00; Y10S522/908; Y10S528/00; Y10S528/92
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
52 words
A dental composition, especially for tooth fillings and dentures, including at least two components, one component comprising a polymerizable diacrylic acid ester selected from the group consisting of the diacrylic acid ester or dimethacrylic acid ester of bishydroxymethylthricyclo [5.2.1.0 2 ,6 ]-decane and mixtures thereof, the other component comprising a radical-forming substance.
Claim 2
Dependent Claim
52 words
A dental composition, especially for tooth fillings and dentures, including at least two components, one component comprising a polymerizable diacrylic acid ester selected from the group consisting of the diacrylic acid ester or dimethacrylic acid ester of bishydroxymethylthricyclo [5.2.1.0 2 ,6 ]-decane and mixtures thereof, the other component comprising a radical-forming substance.
Claim 3
Dependent Claim
19 words
The dental composition of claim 1, wherein said composition further includes at least one of fillers, stabilizers and pigments.
Claim 4
Dependent Claim
21 words
The dental composition of claim 1, wherein said composition further includes other polymerizable monofunctional or difunctional acrylic or methacrylic acid esters.
Claim 5
Dependent Claim
35 words
The dental composition of claim 3, wherein said other polymerizable diacrylic acid esters include the acrylic acid or methacrylic acid esters of at least one compound selected from hexanediol; 2,2 bis-[p-(hydroxyethoxy-)phenyl]-propane; and 2,2 bis-[ p-(γ-hydroxypropoxy-)phenyl]-propane.
Claim 6
Dependent Claim
24 words
The dental composition of claim 3, wherein at least 20% of said polymerizable diacrylic acid esters are esters of said bishydroxymethyltricyclo[5.2.1.0 2 ,6 ]-decane.
Claim 7
Dependent Claim
14 words
The dental composition of claim 1, wherein said radical-forming substance is an oxidation-reduction system.
Claim 8
Dependent Claim
15 words
The dental composition of claim 1, wherein said composition further includes an initiator for photo-polymerization.
Claim 9
Dependent Claim
23 words
The dental composition of claim 1, wherein said components are each liquid or in a liquid form in combination with another liquid component.
Claim 10
Dependent Claim
23 words
The dental composition of claim 1, wherein at least one of said components is in a paste form in combination with a filler.
Claim 11
Dependent Claim
15 words
The dental composition of claim 1, wherein both of said components are in paste form.
Claim 12
Dependent Claim
47 words
In a method for forming dental fillings and prosthetic dental applicances in which a polymerizable diacrylic or dimethacrylic acid ester is polymerized to form a hardened product, the improvement wherein at least 20 percent of said polymerizable ester is the ester of bishydroxymethyltricyclo [5.2.1.0 2 ,6 ]-decane.
Claim 13
Dependent Claim
47 words
In a method for forming dental fillings and prosthetic dental applicances in which a polymerizable diacrylic or dimethacrylic acid ester is polymerized to form a hardened product, the improvement wherein at least 20 percent of said polymerizable ester is the ester of bishydroxymethyltricyclo [5.2.1.0 2 ,6 ]-decane.
Claim 14
Dependent Claim
52 words
An improved dental composition having shortened hardening time and after hardening increased compressive strength and abrasion resistance comprising a polymerizable acrylic or methacrylic acid ester or diester and a radical-forming compound, at least 20 percent of the polymerizable ester being the diacrylic or dimethacrylic acid ester of bishydroxymethyltricyclo [5.2.1.0 2 ,6 ]-decane.
Claim 15
Dependent Claim
52 words
An improved dental composition having shortened hardening time and after hardening increased compressive strength and abrasion resistance comprising a polymerizable acrylic or methacrylic acid ester or diester and a radical-forming compound, at least 20 percent of the polymerizable ester being the diacrylic or dimethacrylic acid ester of bishydroxymethyltricyclo [5.2.1.0 2 ,6 ]-decane.
References Cited (Backward Citations)
US2454743A
Cited
US3923740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |