US4552906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerizable dental compositions and molded dental articles produced therefrom
Assignee: Kulzer GmbH
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Filing: 1984-04-27
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Granted: 1985-11-12
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Expires: 2004-04-27
Abstract
Abstract A dental composition suitable for being polymerized to a dental prosthesis approximately comprising by weight (A) 20 to 50% of a mixture of monofunctional and polyfunctional methacrylic esters and, optionally, other monomers, (B) 20 to 60% of an essentially non-crosslinked polymer homogeneously filled with microfine inorganic filler and based on (meth)acrylic esters and, optionally, other monomers, (C) 0.5 to 25% of a non-crosslinked polymer having a glass transition temperature≦0° C. and a molecular weight M w of 10 3 -5×10 5 , and (D) 0 to 40% of a finely divided inorganic filler treated with an adhesion promoter.
Inventors
- 👤 Wolfgang Podszun
- 👤 Fritjof Bley
- 👤 Michael Walkowiak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:22
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/02; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
In a polymerizable dental composition comprising a polyfunctional (meth)acrylic ester as binder, and about 5 to 50% by weight of a microfine inorganic filler, the improvement which comprises about 0.5 to 25% by weight of a non-crosslinked polymer having a glass transition temperature ≦0° C. and a molecular weight M w of about 10 3 -5×10 5 .
Claim 2
Dependent Claim
58 words
In a polymerizable dental composition comprising a polyfunctional (meth)acrylic ester as binder, and about 5 to 50% by weight of a microfine inorganic filler, the improvement which comprises about 0.5 to 25% by weight of a non-crosslinked polymer having a glass transition temperature ≦0° C. and a molecular weight M w of about 10 3 -5×10 5 .
Claim 3
Dependent Claim
86 words
A dental composition according to claim 1, comprising by weight (A) 20 to 50% of a mixture of monofunctional and polyfunctional methacrylic esters, (B) 20 to 60% of an essentially non-crosslinked polymer homogeneously filled with microfine inorganic filler and based on (meth)acrylic esters, (C) 0.5 to 25% of a non-crosslinked polymer having a glass transition temperature ≦0° C. and a molecular weight M w of 10 3 -5×10 5 , and (D) 0 to 40% of a finely divided inorganic filler treated with an adhesion promoter.
Claim 4
Dependent Claim
35 words
A dental composition according to claim 1, wherein the microfine inorganic filler has a particle size of about 10 to 500 nm and a BET surface area of about 30 to 300 m 2 /g.
Claim 5
Dependent Claim
44 words
A dental composition according to claim 1, wherein the microfine inorganic filler comprises silicon dioxide obtained by flame hydrolysis and having a mean particle size of about 10 to 40 nm and a BET surface area of about 40 to 200 m 2 /g.
Claim 6
Dependent Claim
14 words
A dental composition according to claim 1, wherein the microfine inorganic filler is silanized.
Claim 7
Dependent Claim
26 words
A dental composition according to claim 1, wherein the non-crosslinked polymer is an aliphatic polyester having a molecular weight of about 10 3 -5×10 5 .
Claim 8
Dependent Claim
99 words
A dental composition according to claim 1, wherein the non-crosslinked polymer comprises a polyester(ether)carbonate having repeating structural units of the formula ##STR5## in which X 1 denotes identical or different aliphatic polyester moieties having a molecular weight from about 200 to 6,000, X has the meaning of X 1 or represents identical or different aliphatic polyether moieties having a molecular weight from about 200 to 20,000, n is an integer from 0 to 20, p is an integer from 1 to 20, and m ≧20, the intrinsic viscosity of the polymer in tetrahydrofuran being about 0.5 to 2.5 dl/g.
Claim 9
Dependent Claim
68 words
A dental composition according to claim 7, in which X 1 denotes identical or different aliphatic polyester moieties having a molecular weight from about 750 to 3,500, X has the meaning of X 1 or represents identical or different aliphatic polyether moieties having a molecular weight from about 700 to 10,000, n is an integer from 10 to 20, and p is an integer from 10 to 20.
Claim 10
Dependent Claim
52 words
A dental composition according to claim 8, in which X 1 denotes identical or different aliphatic polyester moieties having a molecular weight from about 1,000 to 2,500, and X has the meaning of X 1 or represents identical or different aliphatic polyether moieties having a molecular weight from about 1,000 to 3,000.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |