US4588649A
Expired / Lapsed
US
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Aqueous dielectric coatings based on copolymers of high acid content
Assignee: Rohm and Haas Co
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Filing: 1984-12-20
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Granted: 1986-05-13
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Expires: 2004-12-20
Abstract
Abstract Dielectric coating compositions intended for application to conductive papers are disclosed. These coating compositions comprise a pigmented aqueous dispersion of a carboxyl-functional copolymer of copolymerized monoethylenically unsaturated monomers including form 8% to 18% by weight of monoethylenically unsaturated carboxylic acid, such as acrylic acid. The carboxyl-functional copolymer is dispersed in water with the aid of a volatile amine, such as ammonia, and the water dispersion is pigmented to contain calcium carbonate and/or clay in a pigment to binder weight ratio of from 0.5:1 to 6:1.
Inventors
- 👤 Karel Kriz
- 👤 Ralph L Minnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:06
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/58; G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G5/0205; G03G5/0208; G03G5/0217; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
100 words
Conductive paper coated with a dielectric coating composition comprising, a pigmented aqueous dispersion of a carboxyl-functional copolymer of copolymerized monoethylenically unsaturated monomers including from 8% to 18% by weight of monoethylenically unsaturated carboxylic acid, based on the total weight of monoethylenic monomer, this carboxyl-functional copolymer being dispersed in water with the aid of a volatile amine, and the water dispersion being pigmented to contain calcium carbonate and/or clay in a pigment to binder weight ratio of from 0.5:1 to 6:1, said coating composition being applied to said conductive paper in an amount of at least about 4 pounds per ream.
Claim 2
Dependent Claim
100 words
Conductive paper coated with a dielectric coating composition comprising, a pigmented aqueous dispersion of a carboxyl-functional copolymer of copolymerized monoethylenically unsaturated monomers including from 8% to 18% by weight of monoethylenically unsaturated carboxylic acid, based on the total weight of monoethylenic monomer, this carboxyl-functional copolymer being dispersed in water with the aid of a volatile amine, and the water dispersion being pigmented to contain calcium carbonate and/or clay in a pigment to binder weight ratio of from 0.5:1 to 6:1, said coating composition being applied to said conductive paper in an amount of at least about 4 pounds per ream.
Claim 3
Dependent Claim
21 words
Conductive paper as recited in claim 1 in which said copolymer includes from 9% to 15% of copolymerized unsaturated carboxylic acid.
Claim 4
Dependent Claim
21 words
Conductive paper as recited in claim 1 in which said carboxylic acid is acrylic acid, methacrylic acid, or a mixture thereof.
Claim 5
Dependent Claim
14 words
Conductive paper as recited in claim 1 in which said volatile amine is ammonia.
Claim 6
Dependent Claim
15 words
Conductive paper as recited in claim 4 in which said carboxylic acid is acrylic acid.
Claim 7
Dependent Claim
27 words
Conductive paper as recited in claim 1 in which said volatile amine is present to neutralize from 20% to 50% of the carboxyl groups which are present.
Claim 8
Dependent Claim
30 words
Conductive paper as recited in claim 1 in which said water dispersion is pigmented to contain calcium carbonate in a pigment to binder weight ratio of from 0.8:1 to 3:1.
Claim 9
Dependent Claim
20 words
Conductive paper as recited in claim 7 in which said copolymerized monoethylenically unsaturated monomers are acrylic and methacrylic acid esters.
Claim 10
Dependent Claim
14 words
Conductive paper as recited in claim 8 in which said monomers comprise methyl methacrylate.
Claim 11
Dependent Claim
25 words
Conductive paper as recited in claim 9 in which said volatile amine is ammonia and said copolymer contains from 9% to 15% of acrylic acid.
Claim 12
Dependent Claim
27 words
Coated conductive paper as recited in claim 10 in which said coating is present in an amount of from about 6 to about 9 pounds per ream.
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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) | 1989-05-12 | 1989-11-11 | 1990-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-12 | 1993-11-11 | 1994-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-12 | 1997-11-11 | 1998-05-13 | $7700.00 | Window Closed / Lapsed |