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US4873269A
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Resinous compositions for denture base
Assignee: GC Corp
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Filing: 1987-07-07
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Granted: 1989-10-10
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Expires: 2007-07-07
Abstract
Abstract A resinous composition for denture base, having improved performance suitable for microwave curing comprises (i) a powdery component containing as the main constituents a methacrylate ester polymer having a mean particle size of 50 to 120 microns, a barbituric acid derivative and an organic peroxide, and (ii) a liquid component containing as the main constituents a monomethacrylate ester monomer, a cross-linking agent and a quaternary ammonium chloride.
Inventors
- 👤 Ryoji Nakazato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:33
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F265/06; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
76 words
A resinous composition for denture base, having improved performance suitable for microwave curing, which comprises in combination a two component composition comprised of: (i) a powdery component containing as the main constituents a methacrylate ester polymer having a mean particle size of 50 to 120 microns, a barbituric acid derivative and an organic peroxide, and (ii) a liquid component containing as the main constituents a monomethacrylate ester monomer, a cross-linking agent and a quaternary ammonium chloride.
Claim 2
Dependent Claim
76 words
A resinous composition for denture base, having improved performance suitable for microwave curing, which comprises in combination a two component composition comprised of: (i) a powdery component containing as the main constituents a methacrylate ester polymer having a mean particle size of 50 to 120 microns, a barbituric acid derivative and an organic peroxide, and (ii) a liquid component containing as the main constituents a monomethacrylate ester monomer, a cross-linking agent and a quaternary ammonium chloride.
Claim 3
Dependent Claim
18 words
A resinous composition as defined in claim 1, wherein the methacrylate ester polymer is a methyl methacrylate polymer.
Claim 4
Dependent Claim
21 words
A resinous composition as defined in claim 1, wherein the methacrylate ester polymer is a copolymer composed mainly of methyl methacrylate.
Claim 5
Dependent Claim
29 words
A resinous composition as defined in claim 1, wherein the methacrylate ester polymer is a mixture of a methyl methacrylate polymer with a copolymer composed mainly of methyl methacrylate.
Claim 6
Dependent Claim
30 words
A resinous composition as defined in claim 1, wherein the methacrylate ester polymer is a mixture of a methyl methacrylate polymer with a methacrylate ester polymer other than methyl methacrylate.
Claim 7
Dependent Claim
32 words
A resinous composition as defined in claim 1, wherein the methacrylate ester polymer is a mixture of a methyl methacrylate polymer with a copolymer of a methacrylate ester other than methyl methacrylate.
Claim 8
Dependent Claim
35 words
A resinous composition as defined in claim 1, wherein the methacrylate ester polymer is a mixture of a copolymer composed mainly of methyl methacrylate with a polymer of a methacrylate ester other than methyl methacrylate.
Claim 9
Dependent Claim
35 words
A resinous composition as defined in claim 1, wherein the methacrylate ester polymer is a mixture of a copolymer composed mainly of methyl methacrylate with a copolymer of a methacrylate ester other than methyl methacrylate.
Claim 10
Dependent Claim
39 words
A resinous composition as defined in claim 1, wherein the methacrylate ester polymer is a mixture of a methyl methacrylate polymer, a copolymer composed mainly of methyl methacrylate and a polymer of a methacrylate ester other than methyl methacrylate.
Claim 11
Dependent Claim
39 words
A resinous composition as defined in claim 1, wherein the methacrylate ester polymer is a mixture of a methyl methacrylate polymer, a copolymer composed mainly of methyl methacrylate and a copolymer of a methacrylate ester other than methyl methacrylate.
Claim 12
Dependent Claim
25 words
A resinous composition as defined in claim 1, wherein the barbituric acid derivative is one or more of 4-n-butylbarbituric acid, 1-benzyl-5-phenylbarbituric acid and 1-cyclohexyl-5-ethylbarbituric acid.
Claim 13
Dependent Claim
21 words
A resinous composition as defined in claim 1, wherein the organic peroxide is benzoyl peroxide, dilauroyl peroxide, or a mixture thereof.
Claim 14
Dependent Claim
40 words
A resinous composition as defined in claim 1, wherein 0.05 to 1 weight part of the barbituric acid derivative and 0.1 to 2 weight parts of the organic peroxide are used per 100 weight parts of the methacrylate ester polymer.
Claim 15
Dependent Claim
37 words
A resinous composition as defined in claim 1, wherein the monomethacrylate ester monomer is a methyl methacrylate monomer or a mixture of a methyl methacrylate monomer with a monomethacrylate ester monomer other than said methyl methacrylate monomer.
Claim 16
Dependent Claim
24 words
A resinous composition as defined in claim 1, wherein the crosslinking agent is one or more selected from the group consisting of polyfunctional methacrylates.
Claim 17
Dependent Claim
28 words
A resinous composition as defined in claim 1, wherein the crosslinking agent is one or more selected from the group consisting of polyfunctional methacrylates and a diallyl phthalate.
Claim 18
Dependent Claim
16 words
A resinous composition as defined in claim 1, wherein the crosslinking agent is a diallyl phthalate.
Claim 19
Dependent Claim
30 words
A resinous composition as defined in claim 1, wherein the quaternary ammonium chloride is one or more selected from the group consisting of lauryldimethylbenzylammonium chloride, dilauryldimethylammonium chloride and dioctyldimethylammonium chloride.
Claim 20
Dependent Claim
40 words
A resinous composition as defined in claim 1, wherein 0.1 to 15 weight parts of the cross-linking agent and 0.05 to 1 weight part of the quaternary ammonium chloride are used per 100 weight parts of the monomethacrylate ester monomer.
Claim 21
Dependent Claim
12 words
A denture base prepared from a resinous composition according to 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) | 1992-10-09 | 1993-04-10 | 1993-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-09 | 1997-04-10 | 1997-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-09 | 2001-04-10 | 2001-10-10 | $7700.00 | Window Closed / Lapsed |