US4115479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting resins by polymerizing liquid monomer in mixture of particulated vinyl halide resins
Assignee: Vynacron Dental Co
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Filing: 1976-08-11
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Granted: 1978-09-19
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Expires: 1996-08-11
Abstract
Abstract A casting resin wherein the finished casting has a combined vinyl resin content of from 20 to 65% prepared by polymerizing monomer, for instance methyl methacrylate in the presence of A) vinyl resin, for instance, polyvinylchloride or polyvinylchloride-polyvinylidene chloride copolymer having a particle size within the range of 0.2 to 5 μ and B) vinyl resin, for instance polyvinylchloride or polyvinylchloride-polyvinylidene chloride copolymer having a particle size within the range of 15 to 150 μ, wherein said monomer is a non-solvent at room temperature for said vinyl resins.
Inventors
- 👤 Philip Daidone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:20
CPC Classifications
C; C08; C08F; C08F259/00; C08F259/02; C08L; C08L51/00; C08L51/003
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
A casting resin wherein the finished casting has a combined vinyl resin content of from 20 to 65% prepared by polymerizing a liquid monomer selected from the group consisting of methyl methacrylate, ethyl methacrylate, butylmethacrylate, i-butyl methacrylate, i-propyl methacrylate, the corresponding acrylates, hydroxyacrylates and hydroxy methacrylates and their mixtures; diethylene glycol dimethacrylate, triethylene glycol dimethacrylate and tetraethylene glycol dimethacrylate and their mixtures in the presence of (A) vinyl halide resin having a particle size within the range of 0.2 to 5 μ and (B) vinyl halide resin having a particle size within the range of 15 to 150 μ wherein said liquid monomer is a non-solvent at room temperature for said vinyl halide resins A and B and wherein said vinyl halide resins A and B are present in a ratio of A:B of 1-5:5-1.
Claim 2
Dependent Claim
135 words
A casting resin wherein the finished casting has a combined vinyl resin content of from 20 to 65% prepared by polymerizing a liquid monomer selected from the group consisting of methyl methacrylate, ethyl methacrylate, butylmethacrylate, i-butyl methacrylate, i-propyl methacrylate, the corresponding acrylates, hydroxyacrylates and hydroxy methacrylates and their mixtures; diethylene glycol dimethacrylate, triethylene glycol dimethacrylate and tetraethylene glycol dimethacrylate and their mixtures in the presence of (A) vinyl halide resin having a particle size within the range of 0.2 to 5 μ and (B) vinyl halide resin having a particle size within the range of 15 to 150 μ wherein said liquid monomer is a non-solvent at room temperature for said vinyl halide resins A and B and wherein said vinyl halide resins A and B are present in a ratio of A:B of 1-5:5-1.
Claim 3
Dependent Claim
29 words
A casting resin according to claim 1 wherein resin component B has a particle size wherein the majority of particles fall within the range of 15 to 30 μ.
Claim 4
Dependent Claim
20 words
A casting resin according to claim 1 wherein said polymerization is carried out in the presence of a peroxide catalyst.
Claim 5
Dependent Claim
23 words
A casting resin according to claim 1 wherein said polymerization is carried out in the presence of a tertiary aromatic amine as promoter.
Claim 6
Dependent Claim
38 words
A casting resin according to claim 1, wherein said vinyl resin is vinyl chloride homopolymer or vinyl chloride copolymer with vinyl acetate, vinyl propionate, methyl acrylate, butyl acrylate, methyl methacrylate, butyl methacrylate, acrylonitrile, vinylidine chloride, or dibutyl maleate.
Claim 7
Dependent Claim
17 words
A casting resin according to claim 1 wherein said vinyl halide resin is vinyl chloride-vinylidine chloride copolymer.
Claim 8
Dependent Claim
19 words
A casting resin according to claim 1 wherein said vinyl halide resin component B additionally contains an acrylic resin.
Claim 9
Dependent Claim
25 words
A casting resin according to claim 7 wherein said acrylic resin is present in an amount of up to 65% referred to said component B.
Claim 10
Dependent Claim
122 words
Method of making the casting resin according to claim 1, which comprises polymerizing said liquid monomer in the presence of (A) vinyl halide resin having a particle size within the range of 0.2 to 5 μ and (B) vinyl halide resin having a particle size within the range of 15 to 150 μ wherein said monomer is a non-solvent at room temperature for said vinyl resins, wherein said vinyl halide resin components A and B are present in a ratio of A:B of 1-5:5-1 for a sufficiently long period of time to allow said polymerized liquid monomer and vinyl halide resins to be cast, wherein said monomer is present in an amount of 35 to 80% by wt of the entire mixture.
Claim 11
Dependent Claim
20 words
Method according to claim 1, which comprises conducting said polymerizing in the presence of a tertiary aromatic amine as promoter.
Claim 12
Dependent Claim
17 words
Method according to claim 9, which comprises conducting said polymerizing in the presence of a peroxide catalyst.
References Cited (Backward Citations)
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Cited
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US3700616A
Cited
US3705137A
Cited
US3766106A
Cited
US4014956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |