US4331719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature curing thermosetting coatings for solvent-sensitive moldings
Assignee: DeSoto Inc
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Filing: 1980-12-23
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Granted: 1982-05-25
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Expires: 2000-12-23
Abstract
Abstract A low temperature curing solution coating composition is disclosed for the protection of solvent-sensitive thermoplastic moldings. In these compositions, a solvent medium consisting essentially of alcoholic solvents has dissolved therein a self-curing solution copolymer of monoethylenically unsaturated monomers containing an ether of an N-methylol functional monomer, especially isobutoxymethyl acrylamide. This solution is catalyzed with from 0.5% to 2.0%, based on the weight of the copolymer, of sulfuric acid. The catalyzed compositions are stable and cure at 150° F. to 200° F. without damaging the thermoplastic moldings.
Inventors
- 👤 Frank J. Ragas
- 👤 Ralph L. Minnis
- 👤 Edward J. Murphy
- 👤 Steve J. Vargo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:07
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/046; C08J2457/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
A low temperature curing solution coating composition adapted to be applied to solvent-sensitive thermoplastic moldings and cured at an elevated temperature without damaging said moldings comprising, a solvent medium consisting essentially of alcoholic solvents, said solvent medium having dissolved therein a self-curing solution copolymer of monoethylenically unsaturated monomers comprising nonreactive monomer and from 5% to 30% of the weight of the copolymer of an ether of an N-methylol functional monomer, said solution of copolymer in alcoholic solvent medium being catalyzed with from 0.5% to 2.0%, based on the weight of the copolymer, of sulfuric acid.
Claim 2
Dependent Claim
95 words
A low temperature curing solution coating composition adapted to be applied to solvent-sensitive thermoplastic moldings and cured at an elevated temperature without damaging said moldings comprising, a solvent medium consisting essentially of alcoholic solvents, said solvent medium having dissolved therein a self-curing solution copolymer of monoethylenically unsaturated monomers comprising nonreactive monomer and from 5% to 30% of the weight of the copolymer of an ether of an N-methylol functional monomer, said solution of copolymer in alcoholic solvent medium being catalyzed with from 0.5% to 2.0%, based on the weight of the copolymer, of sulfuric acid.
Claim 3
Dependent Claim
16 words
A coating composition as recited in claim 1 in which said ether is a butyl ether.
Claim 4
Dependent Claim
36 words
A coating composition as recited in claim 1 in which said monoethylenically unsaturated monomers include from 5% to 35% of an hydroxy alkyl acrylate or methacrylate in which the alkyl group contains from 2-4 carbon atoms.
Claim 5
Dependent Claim
20 words
A coating composition as recited in claim 3 in which said hydroxy alkyl acrylate or methacrylate is hydroxy propyl methacrylate.
Claim 6
Dependent Claim
31 words
A coating composition as recited in any one of claims 2-4 in which isobutoxymethyl acrylamide is present in an amount of from 7% to 20% of the weight of the copolymer.
Claim 7
Dependent Claim
23 words
A coating composition as recited in claim 5 in which said sulfuric acid is present in an amount of from 0.7% to 1.5%.
Claim 8
Dependent Claim
49 words
A coating composition as recited in claim 1 in which said N-methylol ether is a C 2 -C 8 alkyl ether of acrylamide or methacrylamide and is present in an amount of 7% to 20% and said sulfuric acid is present in an amount of from 0.7% to 1.5%.
Claim 9
Dependent Claim
23 words
A coating composition as recited in claim 1 in which said alcoholic solvents are selected from butanols, propanols, 2-ethoxy ethanol, and mixtures thereof.
Claim 10
Dependent Claim
128 words
A low temperature curing solution coating composition adapted to be applied to solvent-sensitive thermoplastic moldings and cured at an elevated temperature without damaging said moldings comprising, a solvent medium consisting essentially of alcoholic solvents consisting essentially of alcoholic solvents selected from butanol, propanols, 2-ethoxy ethanol, and mixtures thereof, said solvent medium having dissolved therein a self-curing solution copolymer of monoethylenically unsaturated monomers comprising from 5% to 30% of the weight of the copolymer of a butanol ether of N-methylol acrylamide, from 5% to 35% of an hydroxy alkyl acrylate or methacrylate in which the alkyl group contains from 2-4 carbon atoms, balance nonreactive monomer, said solution of copolymer in alcoholic solvent being catalyzed with from 0.7% to 1.5%, based on the weight of the copolymer, of sulfuric acid.
Claim 11
Dependent Claim
128 words
A low temperature curing solution coating composition adapted to be applied to solvent-sensitive thermoplastic moldings and cured at an elevated temperature without damaging said moldings comprising, a solvent medium consisting essentially of alcoholic solvents consisting essentially of alcoholic solvents selected from butanol, propanols, 2-ethoxy ethanol, and mixtures thereof, said solvent medium having dissolved therein a self-curing solution copolymer of monoethylenically unsaturated monomers comprising from 5% to 30% of the weight of the copolymer of a butanol ether of N-methylol acrylamide, from 5% to 35% of an hydroxy alkyl acrylate or methacrylate in which the alkyl group contains from 2-4 carbon atoms, balance nonreactive monomer, said solution of copolymer in alcoholic solvent being catalyzed with from 0.7% to 1.5%, based on the weight of the copolymer, of sulfuric acid.
Claim 12
Dependent Claim
40 words
A method of protecting the surface of a solvent-sensitive thermoplastic molding comprising applying to said surface the solution coating composition of claim 1, and curing the deposited coating at a temperature in the range of 150° F. to 200° F.
Claim 13
Dependent Claim
16 words
A method as recited in claim 10 in which the thermoplastic molding is a polystyrene molding.
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) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |