US4378463A
Expired / Lapsed
US
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Epihalohydrin polymer composition
Assignee: Raychem Ltd
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Filing: 1981-07-24
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Granted: 1983-03-29
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Expires: 2001-07-24
Abstract
Abstract A composition based on epihalohydrin elastomers comprises from 12 to 125 parts, preferably from 25 to 75 parts, of a suitable tackifier, and from 25 to 150 parts, preferably from 30 to 100 parts, of a particulate filler per 100 parts by weight of elastomer. The tackifier contains polar moieties for compatibility with the elastomer and is preferably a phenolic, modified phenolic, coumarone-indene or polyketone resin. The filler is preferably an inorganic material such as alumina trihydrate, silica, or iron oxide. These composition have useful adhesive and surprising stress-grading properties and are thus suitable for use with heat-recoverable articles in the terminatiion, connection, and encapsulation of high voltage electrical apparatus.
Inventors
- 👤 John M. Senior
- 👤 Linda E. Abrams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:39
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/02; H02G15/06; H02G15/064; H02G15/068; C; C08; C08L; C08L71/00; C08L71/02; C08L71/03; C09; C09J; C09J171/00; C09J171/02; C09J171/03; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/42; H01B3/427; H02G15/08; H02G15/18; H02G15/1806; C08L2666/00; C08L2666/02; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/287; Y10T428/2878; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2936; Y10T428/294
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
74 words
A method of providing relief against electrical stress in a region liable to be affected which comprises filling any voids in said region with a composition comprising: (a) 100 parts by weight of an elastomeric epihalohydrin polymer comprising recurring units having the formula: ##STR2## where X is a halogen atom; (b) from 12 to 125 parts by weight of a tackifier; and (c) from 25 to 150 parts by weight of a particulate filler.
Claim 2
Independent Claim
74 words
A method of providing relief against electrical stress in a region liable to be affected which comprises filling any voids in said region with a composition comprising: (a) 100 parts by weight of an elastomeric epihalohydrin polymer comprising recurring units having the formula: ##STR2## where X is a halogen atom; (b) from 12 to 125 parts by weight of a tackifier; and (c) from 25 to 150 parts by weight of a particulate filler.
Claim 3
Dependent Claim
20 words
A method as in claim 1, wherein the region is around a splice or termination in a high voltage cable.
Claim 4
Dependent Claim
17 words
A method as in claim 2, wherein the high voltage cable is a mass impregnated oil-filled cable.
Claim 5
Dependent Claim
18 words
A method as in claim 2, wherein the cable is a screened cross-linked polyolefin insulated high voltage cable.
Claim 6
Dependent Claim
19 words
A method as in claim 1, wherein the region is in an electrical apparatus subject to high voltage stress.
Claim 7
Dependent Claim
21 words
A method as in claim 1, wherein the composition comprises from 30 to 100 parts by weight of a particulate filler.
Claim 8
Dependent Claim
33 words
A method as in claim 1, wherein the particulate filler is selected from the group consisting of silica, metal oxides, hydrated silica, hydrated metal oxides, silicates, metal powders, carbon black, and mixtures thereof.
Claim 9
Dependent Claim
28 words
A method as in claim 1, wherein the particulate filler comprises a compound selected from the group consisting of silica, metal oxides, hydrated silica, and hydrated metal oxides.
Claim 10
Dependent Claim
13 words
A method as in claim 8, wherein the particulate filler comprises β-alumina trihydrate.
Claim 11
Dependent Claim
44 words
A method as in claim 1, wherein the process of filling said voids comprises: (a) applying said composition to at least a part of a surface of a heat-recoverable article; and (b) recovering said article such that said voids are filled by said composition.
Claim 12
Dependent Claim
81 words
An electrical apparatus subject to high voltage stress having voids in a region liable to be affected by electrical stress filled with a composition which provides relief against said electrical stress, said composition comprising: (a) 100 parts by weight of an elastomeric epihalohydrin polymer comprising recurring units having the formula: ##STR3## where X is a halogen atom; (b) from 12 to 125 parts by weight of a tackifier; and (c) from 25 to 150 parts by weight of a particulate filler.
Claim 13
Dependent Claim
81 words
An electrical apparatus subject to high voltage stress having voids in a region liable to be affected by electrical stress filled with a composition which provides relief against said electrical stress, said composition comprising: (a) 100 parts by weight of an elastomeric epihalohydrin polymer comprising recurring units having the formula: ##STR3## where X is a halogen atom; (b) from 12 to 125 parts by weight of a tackifier; and (c) from 25 to 150 parts by weight of a particulate filler.
Claim 14
Dependent Claim
21 words
An apparatus as in claim 11, wherein the composition comprises from 30 to 100 parts by weight of a particulate filler.
Claim 15
Dependent Claim
33 words
An apparatus as in claim 11, wherein the particulate filler is selected from the group consisting of silica, metal oxides, hydrated silica, hydrated metal oxides, silicates, metal powders, carbon black, and mixtures thereof.
Claim 16
Dependent Claim
28 words
An apparatus as in claim 11, wherein the particulate filler comprises a compound selected from the group consisting of silica, metal oxides, hydrated silica, and hydrated metal oxides.
Claim 17
Dependent Claim
13 words
An apparatus as in claim 14, wherein the particulate filler comprises β-alumina trihydrate.
Claim 18
Dependent Claim
46 words
An apparatus as in claim 11, wherein said voids have been filled by the process of: (a) applying said composition to at least a part of a surface of a heat-recoverable article; and (b) recovering said article such that said voids are filled by said composition.
Claim 19
Dependent Claim
77 words
A high voltage cable having voids in a region liable to be affected by electrical stress filled with a composition which provides relief against said electrical stress, said composition comprising: (a) 100 parts by weight of an elastomeric epihalohydrin polymer comprising recurring units having the formula: ##STR4## where X is a halogen atom; (b) from 12 to 125 parts by weight of a tackifier; and (c) from 25 to 150 parts by weight of a particulate filler.
Claim 20
Dependent Claim
77 words
A high voltage cable having voids in a region liable to be affected by electrical stress filled with a composition which provides relief against said electrical stress, said composition comprising: (a) 100 parts by weight of an elastomeric epihalohydrin polymer comprising recurring units having the formula: ##STR4## where X is a halogen atom; (b) from 12 to 125 parts by weight of a tackifier; and (c) from 25 to 150 parts by weight of a particulate filler.
Claim 21
Dependent Claim
21 words
A cable as in claim 17, wherein the composition comprises from 30 to 100 parts by weight of a particulate filler.
Claim 22
Dependent Claim
33 words
A cable as in claim 17, wherein the particulate filler is selected from the group consisting of silica, metal oxides, hydrated silica, hydrated metal oxides, silicates, metal powders, carbon black, and mixtures thereof.
Claim 23
Dependent Claim
28 words
A cable as in claim 17, wherein the particulate filler comprises a compound selected from the group consisting of silica, metal oxides, hydrated silica, and hydrated metal oxides.
Claim 24
Dependent Claim
13 words
A cable as in claim 20, wherein the particulate filler comprises β-alumina trihydrate.
Claim 25
Dependent Claim
46 words
A cable as in claim 17, wherein said voids have been filled by the process of: (a) applying said composition to at least a part of a surface of a heat-recoverable article; and (b) recovering said article such that said voids are filled by said composition.
References Cited (Backward Citations)
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FR2132338B1
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FR2156293B1
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
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