US3553348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric blends for insulation composition
Assignee: Vulkor Inc
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Filing: 1966-11-02
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Granted: 1971-01-05
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Expires: 1986-11-02
Abstract
Abstract Disclosed is an electrical insulating composition for wire and cable comprising a cross linked ethylene copolymer having about 75 percent to 90 percent by weight of ethylene, a chlorinecontaining polymer and a filler of magnesium silicate having a platelike structure and being coated with an alkoxy silane. Upon cross-linking the composition is characterized by a tensile strength at 150* C. of not less than 800 lbs./sq. in. and a dielectric strength of not less than 1,000 volts/mil.
Inventors
- 👤 Joseph E Betts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:22
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/06; C; C08; C08K; C08K5/00; C08K5/04; C08K5/14; C08K9/00; C08K9/04; C08K9/06; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; H01B7/00; H01B7/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
15 words
A composition according to claim 1 wherein said ethylene copolymer comprises ethylene and vinyl acetate.
Claim 2
Dependent Claim
13 words
A composition according to claim 1 wherein said chlorine-containing polymer is chlorinated polyethylene.
Claim 3
Dependent Claim
24 words
A composition according to claim 1 wherein said filler was coated with about 0.2 percent to 3 percent by weight of said alkoxy silane.
Claim 4
Dependent Claim
32 words
A composition according to claim 1 wherein said alkoxy silane is a vinyl silane and said filler was coated with about 0.2 percent to 3 percent by weight of said vinyl silane.
Claim 5
Dependent Claim
145 words
A composition of matter consisting essentially of: a. a copolymer of ethylene and vinyl acetate having such 75 percent to 90 percent by weight of ethylene; b. chlorinated polyethylene in sufficient quantity such that the chlorine content is in the range of from about 2 percent to 8 percent by weight based on the combined weight of said copolymer and said chlorinated polyethylene; c. a filler consisting essentially of magnesium silicate having a platelike structure and a particle size not greater than 6 microns and coated with about 0.2 to 3 percent by weight of a vinyl silane, said filler comprising at least 25 percent by weight of said composition; and d. said composition characterized upon cure as thermosetting, by a hot tensile strength of not less than 800 pounds per square inch and a dielectric strength of not less than 1,000 volts per mil.
Claim 6
Dependent Claim
37 words
A composition according to claim 6 wherein said copolymer contains about 80 percent to 85 percent by weight ethylene, and said chlorine content is in the range of from about 3 percent to 5 percent by weight.
Claim 7
Dependent Claim
22 words
Electrical cable comprising a conductor and a coating of insulation on said conductor consisting of a composition as claimed in claim 1.
Claim 8
Dependent Claim
22 words
Electrical cable comprising a conductor and a coating of insulation on said conductor consisting of a composition as claimed in claim 6.
Claim 9
Dependent Claim
22 words
Electrical cable comprising a conductor and a coating of insulation on said conductor consisting of a composition as claimed in claim 7.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |