US3816347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductive elastomeric composition of chlorinated or chlorosulfonated polyethylene,ethylene polymer and conductive carbon black
Assignee: EIDP Inc
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Filing: 1972-11-02
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Granted: 1974-06-11
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Expires: 1992-11-02
Abstract
Abstract An elastomeric composition having beneficial utility for the formation of a vulcanized semiconductive layer on an electric cable (e.g., a cable having an ethylene polymer insulation layer), and comprising (A) an elastomer selected from chlorosulfonated polyethylene and chlorinated polyethylene, (B) an ethylene polymer selected from polyethylene and copolymers of ethylene with propylene and/or a diene, (C) conductive carbon black and (D) a peroxide curing agent. It is preferred also to add a plasticizer, an auxiliary curing agent which will enhance the state of cure, and an acid acceptor type of heat stabilizer for the elastomer.
Inventors
- 👤 D Luh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:39
CPC Classifications
H; H01; H01B; H01B9/00; H01B9/02; H01B9/027; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08L; C08L23/00; C08L23/26; C08L23/28; C08L23/286; C08L23/32; C08L23/34; H01B1/00; H01B1/20; H01B1/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
34 words
A composition according to claim 1 which also contains about 0.5-15 parts by weight of an auxiliary curing agent which is a non-peroxide compound of enhancing the state of cure obtained with component (D).
Claim 2
Dependent Claim
43 words
A composition according to claim 2 wherein component (A) is chlorosulfonated polyethylene, and component (B) Is a copolymer of about 50-75 percent by weight of ethylene, about 20-45 percent by weight of propylene and about 3-16 percent by weight of 1,4-hexadiene or 5-ethylidene-2-norbornene.
Claim 3
Dependent Claim
37 words
A composition according to claim 3 which also contains about 10-50 parts by weight of a plasticizer for component (A), and about 2-70 parts by weight of an acid acceptor type of heat stabilizer for component (A).
Claim 4
Dependent Claim
44 words
A composition according to claim 4 which contains about 20-50 parts by weight of component (B), about 45-75 parts of component (C), about 2-5 parts of component (D), about 2.5-10 parts of the auxiliary curing agent, and about 4-55 parts of the acid acceptor.
Claim 5
Dependent Claim
12 words
A composition according to claim 4 wherein component (D) is dicumyl peroxide.
Claim 6
Dependent Claim
12 words
A composition according to claim 4 wherein the acid acceptor is litharge.
Claim 7
Dependent Claim
14 words
A composition according to claim 4 wherein the auxiliary curing agent is trimethylolpropane trimethacrylate.
Claim 8
Dependent Claim
19 words
A composition according to claim 4 wherein said plasticizer is selected from the group: hydrocarbon oils and chlorinated paraffin.
Claim 9
Dependent Claim
12 words
A cured elastomeric composition obtained by heating the composition of claim 1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |