US4155890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental plastic
Assignee: Individual
•
Filing: 1978-04-18
•
Granted: 1979-05-22
•
Expires: 1998-04-18
Abstract
Abstract Dental plastic, suitable for cold polymerization in the mouth, is formed of a mixture of acrylic polymer dissolved in monomer of methacrylate and/or acrylate of 6 - 10 carbons, to which is added metal soap and, if need be, metal silica and optionally a cross-linking agent.
Inventors
- 👤 Frauke Hofacker-Freifrau Von Nostitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:16
CPC Classifications
A; A61; A61Q; A61Q3/00; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; A61K6/90; A61K8/00; A61K8/18; A61K8/72; A61K8/81; A61K8/8141; A61K8/8152
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
65 words
In a polymerizable composition for manufacturing elastic, soft, or hard plastic for dental and related purposes, comprising a mixture of at least one acrylate or methacrylate polymer or copolymer in at least one acrylate or methacrylate monomer, and at least one additive, the improvement wherein: said composition further contains a metal soap component present in an amount sufficient to improve dimensional stability and surface quality.
Claim 2
Dependent Claim
65 words
In a polymerizable composition for manufacturing elastic, soft, or hard plastic for dental and related purposes, comprising a mixture of at least one acrylate or methacrylate polymer or copolymer in at least one acrylate or methacrylate monomer, and at least one additive, the improvement wherein: said composition further contains a metal soap component present in an amount sufficient to improve dimensional stability and surface quality.
Claim 3
Dependent Claim
11 words
A composition according to claim 1, further comprising a metal silicate.
Claim 4
Dependent Claim
19 words
A composition according to claim 1 or 2, said monomeric acrylic or methacrylic acid ester comprising a methyl ester.
Claim 5
Dependent Claim
25 words
A composition according to claim 1 or 2, said monomeric acrylic or methacrylic acid ester comprising predominantly an ester having 6 to 10 carbon atoms.
Claim 6
Dependent Claim
26 words
A composition according to claim 4, wherein the monomeric acrylic or methacrylic acid ester is a t-butyl ester, epoxy-propyl ester hexyl ester or a mixture thereof.
Claim 7
Dependent Claim
13 words
A composition according to claim 5, wherein said ester is a cyclohexyl ester.
Claim 8
Dependent Claim
30 words
A composition according to claim 1, wherein said monomeric acrylic or methacrylic acid ester, which serves for dissolving or dispersing the polymer component, constitutes at least partially a cross-linking dimethacrylate.
Claim 9
Dependent Claim
28 words
A composition according to claim 7, wherein the monomeric acrylic or methacrylic acid ester, which serves to dissolve or disperse the polymer component, completely constitutes said cross-linking agent.
Claim 10
Dependent Claim
19 words
A composition according to claim 7, wherein the cross-linking dimethacrylate is an olefinic dimethacrylate or a (poly)ethylene glycol dimethacrylate.
Claim 11
Dependent Claim
18 words
A composition according to claim 4, wherein the polymer is a mixture of polymethacrylates of medium molecular weight.
Claim 12
Dependent Claim
26 words
A composition according to claim 4, wherein the polymer is a mixture of at least one polymethacrylate of medium molecular weight and at least one polyacrylate.
Claim 13
Dependent Claim
23 words
A composition according to claim 4, wherein the amount by weight of the polymer is 10 to 40%, based on the total mass.
Claim 14
Dependent Claim
15 words
A composition according to claim 2, wherein the metal silicate is an alkali metal silicate.
Claim 15
Dependent Claim
32 words
A composition according to claim 2, wherein the amount of said at least one of the metal soap or the silicate is 0.1 to 10% by weight based on the total amount.
Claim 16
Dependent Claim
27 words
A composition according to claim 2, wherein the amount of said at least one of the metal soap or the silicate is 1.5 to 5% by weight.
Claim 17
Dependent Claim
19 words
A composition according to claim 1, wherein the metal soap is at least one alkaline earth fatty acid salt.
Claim 18
Dependent Claim
20 words
A composition according to claim 1, wherein the metal soap is calcium stearate or magnesium stearate or a mixture thereof.
Claim 19
Dependent Claim
15 words
A composition according to claim 2, wherein the metal silicate is an alkali aluminum silicate.
Claim 20
Dependent Claim
42 words
Use of the composition according to claim 4 for the manufacture of plastic dental prostheses, dental replacements, teeth, jaw impressions, or linings for prostheses comprising adding a catalyst to said composition, and placing said composition in the mouth for polymerization in situ.
Claim 21
Dependent Claim
60 words
Use of the material according to claim 19, whereby the catalyst is applied separately in a rapidly evaporating solvent or a primer film upon a tooth cavity or the underside of the prosthesis after preliminary roughening of the adhesive surface of the prosthesis or on the jaw side either alone or with the addition of a catalyst to the material.
Claim 22
Dependent Claim
16 words
Use of the material according to claim 1 for the manufacture of linings for limb prostheses.
Claim 23
Dependent Claim
14 words
Use of the material according to claim 1 for the manufacture of artificial fingernails.
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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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |