US4490774A
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Capacitors containing polyfunctional acrylate polymers as dielectrics
Assignee: Spectrum Control Inc
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Filing: 1983-12-19
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Granted: 1984-12-25
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Expires: 2003-12-19
Abstract
Abstract Novel capacitors comprise two electrodes and, as a dielectric member, a polymer of at least one polyfunctional acrylate of the formula ##STR1## wherein R 1 is an aliphatic, alicyclic or mixed aliphatic-alicyclic radical having about 10-40 carbon atoms which is preferably branched, R 2 is hydrogen or methyl, and n is from 2 to 4. Said capacitors are characterized by a low dissipation factor.
Inventors
- 👤 Daniel R. Olson
- 👤 Timothy W. O'Donnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:11
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/14; H01G4/18
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
27 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
Claim 2
Dependent Claim
27 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
Claim 3
Dependent Claim
42 words
R 1 is an aliphatic, alicyclic or mixed aliphatic-alicyclic radical derived from a polyhydroxy compound of the formula R 1 (OH) n and having about 10-40 carbon atoms which optionally contains up to about three olefinic linkages, said olefinic linkages being non-conjugated;
Claim 4
Dependent Claim
42 words
R 1 is an aliphatic, alicyclic or mixed aliphatic-alicyclic radical derived from a polyhydroxy compound of the formula R 1 (OH) n and having about 10-40 carbon atoms which optionally contains up to about three olefinic linkages, said olefinic linkages being non-conjugated;
Claim 5
Dependent Claim
7 words
R 2 is hydrogen or methyl; and
Claim 6
Dependent Claim
7 words
R 2 is hydrogen or methyl; and
Claim 7
Dependent Claim
6 words
n is from 2 to 4.
Claim 8
Dependent Claim
6 words
n is from 2 to 4.
Claim 9
Dependent Claim
11 words
A capacitor according to claim 1 wherein the electrodes are aluminum.
Claim 10
Dependent Claim
25 words
A capacitor according to claim 2 wherein the dielectric member is a polymer in which all of the units are derived from said polyfunctional acrylate.
Claim 11
Dependent Claim
32 words
A capacitor according to claim 2 wherein the dielectric member is a copolymer of said polyfunctional acrylate with at least one of acrylates of higher monohydroxy alcohols, higher monoepoxides, polyols and polyepoxides.
Claim 12
Dependent Claim
11 words
A capacitor according to claim 2 wherein R 2 is hydrogen.
Claim 13
Dependent Claim
19 words
A capacitor according to claim 5 wherein R 1 has at least 18 carbon atoms in a single chain.
Claim 14
Dependent Claim
14 words
A capacitor according to claim 6 wherein R 1 is a branched chain radical.
Claim 15
Dependent Claim
34 words
A capacitor according to claim 7 wherein the polyfunctional acrylate has one of the formulas ##STR14## wherein r and s are each 7 or 8 and the sum of r and s is 15.
Claim 16
Dependent Claim
13 words
A capacitor according to claim 8 wherein the polyfunctional acrylate has formula II.
Claim 17
Dependent Claim
13 words
A capacitor according to claim 8 wherein the polyfunctional acrylate has formula III.
Claim 18
Dependent Claim
43 words
A capacitor according to claim 2 wherein R 1 is at least one aliphatic or alicyclic radical containing about 20-40 carbon atoms and optionally up to about three non-conjugated olefinic linkages, at least about 40% of said R 1 radicals containing alicyclic moieties.
Claim 19
Dependent Claim
11 words
A capacitor according to claim 11 wherein R 2 is hydrogen.
Claim 20
Dependent Claim
30 words
A capacitor according to claim 12 wherein R 1 is derived from at least one polyhydroxy compound prepared by reduction of at least one corresponding polycarboxylic acid or ester thereof.
Claim 21
Dependent Claim
14 words
A capacitor according to claim 13 wherein the polycarboxylic acid is linoleic acid dimer.
Claim 22
Dependent Claim
24 words
A capacitor according to claim 13 wherein the polyhydroxy compound has the formula ##STR15## wherein the broken line indicates a single or double bond.
Claim 23
Dependent Claim
25 words
A capacitor according to claim 2 wherein R 1 has the formula ##STR16## wherein R 3 is an alkyl radical having about 8-28 carbon atoms.
Claim 24
Dependent Claim
11 words
A capacitor according to claim 16 wherein R 2 is hydrogen.
Claim 25
Dependent Claim
24 words
A capacitor according to claim 17 wherein R 3 has the formula R 4 CH 2 , wherein R 4 is an alkyl radical.
Claim 26
Dependent Claim
20 words
A capacitor according to claim 18 wherein R 4 is a straight chain alkyl radical having about 9-17 carbon atoms.
Claim 27
Dependent Claim
11 words
A capacitor according to claim 19 wherein R 3 is n-tetradecyl.
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) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |