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US4499520A
Expired / Lapsed
US
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Capacitor with dielectric comprising poly-functional acrylate polymer and method of making
Assignee: Spectrum Control Inc
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Filing: 1983-12-19
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Granted: 1985-02-12
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Expires: 2003-12-19
Abstract
Abstract Novel electrical capacitors comprise two electrodes separated by a dielectric member, said dielectric member comprising a polymer of at least one polyfunctional acrylate. The capacitor structure may constitute a single dielectric coating separating two electrode layers, or may comprise a plurality of alternating electrode layers and dielectric coatings.
Inventors
- 👤 Stanley W. Cichanowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:40
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/14; H01G4/18; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/447; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
61 words
A capacitor comprising two electrodes separated by a dielectric member, said dielectric member comprising a polymer of at least one polyfunctional acrylate having the formula ##STR13## wherein: R 1 is a hydrocarbon or substituted hydrocarbon radical containing at least 4 carbon atoms; R 2 is hydrogen or an alkyl radical containing 1-5 carbon atoms; and n is from 2 to 6.
Claim 2
Dependent Claim
61 words
A capacitor comprising two electrodes separated by a dielectric member, said dielectric member comprising a polymer of at least one polyfunctional acrylate having the formula ##STR13## wherein: R 1 is a hydrocarbon or substituted hydrocarbon radical containing at least 4 carbon atoms; R 2 is hydrogen or an alkyl radical containing 1-5 carbon atoms; and n is from 2 to 6.
Claim 3
Dependent Claim
11 words
A capacitor according to claim 1 wherein the electrodes are aluminum.
Claim 4
Dependent Claim
19 words
A capacitor according to claim 2 wherein R 2 is hydrogen or methyl and n is 2 or 3.
Claim 5
Dependent Claim
54 words
A capacitor according to claim 3 wherein the polyfunctional acrylate is derived from an aliphatic polyhydroxy compound containing about 4-20 carbon atoms, a polymer having groups capable of reacting with acrylic acid or derivatives thereof and having a number average molecular weight within the range of about 1000-5000, or an aromatic diepoxide or polyepoxide.
Claim 6
Dependent Claim
60 words
A capacitor according to claim 4 wherein the polyfunctional acrylate is selected from the group consisting of trimethylolpropane triacrylate, neopentyl glycol diacrylate, bisphenol A diacrylate, diacrylates of diepoxides derived from bisphenol A and ethoxylated derivatives thereof, diacrylates of α,ω-alkanediols containing an average of 12-20 carbon atoms and diacrylates of butadiene resins having a number average molecular weight of about 3000.
Claim 7
Dependent Claim
11 words
A capacitor according to claim 5 wherein R 2 is hydrogen.
Claim 8
Dependent Claim
17 words
A capacitor according to claim 5 wherein the polymer is prepared from a blend of polyfunctional acrylates.
Claim 9
Dependent Claim
11 words
A capacitor according to claim 7 wherein R 2 is hydrogen.
Claim 10
Dependent Claim
48 words
A capacitor according to claim 4 wherein the polymer is a copolymer prepared from a mixture of at least one compound of formula I with at least one monoacrylate of the formula ##STR14## wherein R 3 is a hydrocarbon or substituted hydrocarbon radical containing about 4-25 carbon atoms.
Claim 11
Dependent Claim
12 words
A capacitor according to claim 9 wherein the monoacrylate is cyclohexyl methacrylate.
Claim 12
Independent Claim
75 words
A method of making a capacitor which comprises the steps of forming on a substrate a dielectric coating of a polymer of at least one polyfunctional acrylate having the formula ##STR15## wherein: R 1 is a hydrocarbon or substituted hydrocarbon radical containing at least four carbon atoms; R 2 is hydrogen or an alkyl radical containing 1-5 carbon atoms; and n is from 2 to 6; and depositing an electrode layer on said dielectric coating.
Claim 13
Independent Claim
75 words
A method of making a capacitor which comprises the steps of forming on a substrate a dielectric coating of a polymer of at least one polyfunctional acrylate having the formula ##STR15## wherein: R 1 is a hydrocarbon or substituted hydrocarbon radical containing at least four carbon atoms; R 2 is hydrogen or an alkyl radical containing 1-5 carbon atoms; and n is from 2 to 6; and depositing an electrode layer on said dielectric coating.
Claim 14
Dependent Claim
24 words
A method according to claim 11 wherein the dielectric coating is formed by applying a polyfunctional acrylate monomer film and subsequently polymerizing said film.
Claim 15
Dependent Claim
19 words
A method according to claim 12 wherein R 2 is hydrogen or methyl and n is 2 or 3.
Claim 16
Dependent Claim
54 words
A method according to claim 13 wherein the polyfunctional acrylate is derived from an aliphatic polyhydroxy compound containing about 4-20 carbon atoms, a polymer having groups capable of reacting with acrylic acid or derivatives thereof and having a number average molecular weight within the range of about 1000-5000, or an aromatic diepoxide or polyepoxide.
Claim 17
Dependent Claim
16 words
A method according to claim 14 wherein the monomer film is polymerized by an electron beam.
Claim 18
Dependent Claim
11 words
A method according to claim 14 wherein R 2 is hydrogen.
Claim 19
Dependent Claim
17 words
A method according to claim 16 wherein the polymer is prepared from a blend of polyfunctional acrylates.
Claim 20
Dependent Claim
11 words
A method according to claim 17 wherein R 2 is hydrogen.
Claim 21
Dependent Claim
48 words
A method according to claim 14 wherein the polymer is a copolymer prepared from a mixture of at least one compound of formula I with at least one monoacrylate of the formula ##STR16## wherein R 3 is a hydrocarbon or substituted hydrocarbon radical containing about 4-25 carbon atoms.
Claim 22
Dependent Claim
16 words
A method according to claim 19 wherein the monomer film is polymerized by an electron beam.
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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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |