US4104698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wax compositions for flame retardant electrical insulation coatings
Assignee: Sumitomo Durez Co Ltd
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Filing: 1977-02-07
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Granted: 1978-08-01
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Expires: 1997-02-07
Abstract
Abstract A ceramic capacitor is provided having a flame retardant electrical insulation coating characterized by blending 10 - 15 percent by weight of an uniformly melt-blendable non-heat-reactive type synthetic resin, with melting points between 70° and 150° C. into a flame-retardant wax, which contains a halogenated flame retardent.
Inventors
- 👤 Takao Murata
- 👤 Nobutaka Nakamura
- 👤 Tateo Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:20
CPC Classifications
H; H01; H01G; H01G2/00; H01G2/12; C; C09; C09D; C09D191/00; C09D191/06; H01B; H01B7/00; H01B7/17; H01B7/29; H01B7/295
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
140 words
A ceramic capacitor containing as a coating an electrical insulating composition comprising a microcrystalline wax, a halogenated organic flame retardant, and a synthetic resin, the improvement wherein the insulating composition contains as a flame retardant tribromophenol alkyl ether which has a decomposition temperature above about 200° C and which has a melting point of about 70° C to about 150° C in a proportion of about 10 to about 200 percent by weight of the wax and as the synthetic resin a thermoplastic resin selected from the group consisting of phenolic resins, alkyl-phenolic resins, alkyl-benzene resins, terpene resins, cumarone resins, quanamine resins, and alicyclic saturated hydrocarbon resins, said thermoplastic resin having a melting point of about 70° C to about 150° C and is present in a proportion of about 10 to about 50 percent by weight of said wax.
Claim 2
Dependent Claim
140 words
A ceramic capacitor containing as a coating an electrical insulating composition comprising a microcrystalline wax, a halogenated organic flame retardant, and a synthetic resin, the improvement wherein the insulating composition contains as a flame retardant tribromophenol alkyl ether which has a decomposition temperature above about 200° C and which has a melting point of about 70° C to about 150° C in a proportion of about 10 to about 200 percent by weight of the wax and as the synthetic resin a thermoplastic resin selected from the group consisting of phenolic resins, alkyl-phenolic resins, alkyl-benzene resins, terpene resins, cumarone resins, quanamine resins, and alicyclic saturated hydrocarbon resins, said thermoplastic resin having a melting point of about 70° C to about 150° C and is present in a proportion of about 10 to about 50 percent by weight of said wax.
Claim 3
Dependent Claim
24 words
The capacitor of claim 1 wherein the proportion of the flame retardant is about 80 to about 120 percent by weight of the wax.
Claim 4
Dependent Claim
15 words
The capacitor of claim 2 wherein said thermoplastic synthetic resin is a terpene-modified phenolic resin.
Claim 5
Dependent Claim
14 words
The capacitor of claim 2 wherein said thermoplastic synthetic resin is a novolac resin.
Claim 6
Dependent Claim
16 words
The capacitor of claim 4 wherein said novolac resin is a para-tertiary octyl phenol-formaldehyde novolac resin.
Claim 7
Dependent Claim
45 words
The capacitor of claim 5 wherein the flame retardant has a melting point of at least 78° C., a decomposition temperature of at least 280° C., and is insoluble in water and n-hexane, difficulty soluble in alcohol, acetone and carbon tetrachloride and soluble in benzene.
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) | 1981-07-31 | 1982-01-30 | 1982-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-31 | 1986-01-30 | 1986-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-31 | 1990-01-30 | 1990-08-01 | $7700.00 | Window Closed / Lapsed |