US4246142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanizable semi-conductive compositions
Assignee: Union Carbide Corp
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Filing: 1976-10-04
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Granted: 1981-01-20
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Expires: 1996-10-04
Abstract
Abstract Vulcanizable semi-conductive compositions that can be used to provide strippable insulation shielding compositions for electrical conductors, and articles of manufacture wherein the cross-linked products of said vulcanizable compositions are directly bonded to a crosslinked polyolefin substrate.
Inventors
- 👤 Lucio Ongchin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:53
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L9/00; C08L9/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
A vulcanizable semi-conductive insulation shielding composition consisting essentially of (A) an ethylene copolymer selected from the group consisting of an ethylene-alkyl acrylate copolymer containing from about 15 to 45 weight percent of alkyl acrylate based on the total weight of said copolymer, said alkyl acrylate being selected from the group consisting of the C 1 to C 8 alkyl esters of acrylic acid and methacrylic acid, and an ethylene-vinyl acetate copolymer containing from about 15 to 45 weight percent of vinyl acetate based on the total weight of said copolymer, (B) a butadiene-acrylonitrile copolymer containing from about 10 to about 50 percent by weight of acrylonitrile based on the total weight of said copolymer, (C) conductive carbon black, and (D) a peroxide crosslinking agent, wherein the weight ratio of (A) to (B) in said composition is 1:9 to 9:1, wherein the weight ratio of (C) to the sum weight of (A)+(B) in said composition is 0.1 to 1.5 and wherein (D) is present in an amount of from about 0.2 to about 5 percent by weight based on the total weight of the composition.
Claim 2
Dependent Claim
184 words
A vulcanizable semi-conductive insulation shielding composition consisting essentially of (A) an ethylene copolymer selected from the group consisting of an ethylene-alkyl acrylate copolymer containing from about 15 to 45 weight percent of alkyl acrylate based on the total weight of said copolymer, said alkyl acrylate being selected from the group consisting of the C 1 to C 8 alkyl esters of acrylic acid and methacrylic acid, and an ethylene-vinyl acetate copolymer containing from about 15 to 45 weight percent of vinyl acetate based on the total weight of said copolymer, (B) a butadiene-acrylonitrile copolymer containing from about 10 to about 50 percent by weight of acrylonitrile based on the total weight of said copolymer, (C) conductive carbon black, and (D) a peroxide crosslinking agent, wherein the weight ratio of (A) to (B) in said composition is 1:9 to 9:1, wherein the weight ratio of (C) to the sum weight of (A)+(B) in said composition is 0.1 to 1.5 and wherein (D) is present in an amount of from about 0.2 to about 5 percent by weight based on the total weight of the composition.
Claim 3
Dependent Claim
18 words
A vulcanizable semi-conductive composition as defined in claim 1 wherein the ethylene copolymer is an ethylene-vinyl acetate copolymer.
Claim 4
Dependent Claim
34 words
A vulcanizable semi-conductive composition as defined in claim 2 wherein (D) is present in an amount of from about 0.6 to about 2 percent by weight based on the total weight of the composition.
Claim 5
Dependent Claim
32 words
A vulcanizable semi-conductive composition as defined in claim 3, wherein about 0.2 to about 1 percent by weight of an antioxidant based on the total weight of the composition is also present.
Claim 6
Dependent Claim
17 words
A vulcanizable semi-conducting composition as defined in claim 4 wherein said peroxide crosslinking agent is di-α-cumyl peroxide.
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) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |