US3950304A
Expired / Lapsed
US
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Curable composition used for an electrical insulating material
Assignee: Mitsubishi Chemical Corp
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Filing: 1974-02-01
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Granted: 1976-04-13
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Expires: 1994-02-01
Abstract
Abstract A curable composition used for electric insulating material comprises a polyhydroxy hydrocarbon polymer, carbon black and talc or clay.
Inventors
- 👤 Jihei Inomata
- 👤 Susumu Michishima
- 👤 Kanji Kasahara
- 👤 Seiichi Hino
- 👤 Satoru Igarashi
- 👤 Tatsuo Tani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:19
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69; C08G63/00; C08G63/02; C08G63/12; C08G63/52; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
A curable composition having excellent electrical properties, which comprises: a polyhydroxy hydrocarbon polymer characterized by a hydroxyl group content of at least about 1.5 and selected from the group consisting of polyhydroxy diene polymers, hydrogenated polyhydroxy diene polymers, mixtures of unsaturated, polyhydroxy diene polymers and saturated polyhydroxy diene polymers, oxdized hydrogenated products of isobutylene-diene copolymers and oxidized hydrogenated products of α-olefin-nonconjugated diene copolymers; from 10 - 150 wt.% of talc, clay or mixtures thereof, from 0.1 - 20 wt.% of carbon black and from 1 - 50 wt.% of a curing agent, wherein the percent by weight limitations are based on the amount of said polyhydroxy hydrocarbon polymer.
Claim 2
Dependent Claim
108 words
A curable composition having excellent electrical properties, which comprises: a polyhydroxy hydrocarbon polymer characterized by a hydroxyl group content of at least about 1.5 and selected from the group consisting of polyhydroxy diene polymers, hydrogenated polyhydroxy diene polymers, mixtures of unsaturated, polyhydroxy diene polymers and saturated polyhydroxy diene polymers, oxdized hydrogenated products of isobutylene-diene copolymers and oxidized hydrogenated products of α-olefin-nonconjugated diene copolymers; from 10 - 150 wt.% of talc, clay or mixtures thereof, from 0.1 - 20 wt.% of carbon black and from 1 - 50 wt.% of a curing agent, wherein the percent by weight limitations are based on the amount of said polyhydroxy hydrocarbon polymer.
Claim 3
Dependent Claim
17 words
The curable composition of claim 1, wherein said polyhydroxy hydrocarbon polymer is a saturated polyhydroxy hydrocarbon polymer.
Claim 4
Dependent Claim
21 words
The curable composition of claim 1, wherein said polyhydroxy hydrocarbon polymer is a mixture of saturated and unsaturated polyhydroxy hydrocarbon polymers.
Claim 5
Dependent Claim
15 words
The curable composition of claim 1, wherein said polyhydroxy hydrocarbon polymer is polyhydroxy diene polymer.
Claim 6
Dependent Claim
25 words
The curable composition of claim 1, wherein said curing agent is polycarboxylic acid, an anhydride thereof, a halogenated polycarboxylic acid, a polyepoxide or a polyisocyanate.
Claim 7
Dependent Claim
12 words
The curable composition of claim 1, wherein said curing agent is polyisocyanate.
Claim 8
Dependent Claim
60 words
The curable composition of claim 4, wherein said polyhydroxy diene polymer is prepared by polymerization of 100 - 25% by weight of a conjugated diene monomer and 0 - 75% by weight of a comonomer represented by the formula: ##EQU2## wherein R 1 represents a hydrogen atom or an alkyl group; R 2 represents aryl, carboxyl, ester, nitrile or pyridyl.
Claim 9
Dependent Claim
12 words
A cured composition prepared by curing said curable composition of claim 1.
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) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |