US3960739A
Expired / Lapsed
US
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Method of stabilizing the dielectric strength of polyolefin polymers, and the stabilized compositions and products thereof
Assignee: Vulkor Inc
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Filing: 1973-06-21
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Granted: 1976-06-01
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Expires: 1993-06-21
Abstract
Abstract A method of stabilizing the dielectric strength of polyolefin polymeric compositions when exposed to water, and dielectric stabilized polyolefin polymer compositions and products thereof including electrical insulations and insulated conductors. The polyolefin polymeric compositions are stabilized by the inclusion of a lead stearate compound.
Inventors
- 👤 Burton Thornley MacKenzie, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:59
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; H01B3/308
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
63 words
A method of stabilizing the dielectric strength of polyolefin compositions under wet conditions, comprising dispersing through a polyolefin of at least one polymer composition containing ethylene selected from the group consisting of polyethylene and copolymers of ethylene and other halogen free polymerizable materials, at least about 0.5 parts by weight of lead stearate per 100 parts by weight of the polymer containing ethylene.
Claim 2
Independent Claim
63 words
A method of stabilizing the dielectric strength of polyolefin compositions under wet conditions, comprising dispersing through a polyolefin of at least one polymer composition containing ethylene selected from the group consisting of polyethylene and copolymers of ethylene and other halogen free polymerizable materials, at least about 0.5 parts by weight of lead stearate per 100 parts by weight of the polymer containing ethylene.
Claim 3
Dependent Claim
39 words
The method of stabilizing polyolefin compositions of claim 1, wherein the lead stearate is dispersed through the polymeric composition containing ethylene in amount of about 1 to 10 parts by weight per 100 parts of the polymer containing ethylene.
Claim 4
Dependent Claim
39 words
The method of stabilizing polyolefinic compositions of claim 2, wherein the lead stearate is dispersed through the polymeric composition containing ethylene in amount of about 1.5 to 5 parts by weight per 100 parts of the polymer containing ethylene.
Claim 5
Independent Claim
88 words
A method of stabilizing the dielectric strength of polymeric compositions containing at least about 70 percent by weight of ethylene under wet conditions, comprising dispersing through a composition of at least one polymer containing at least about 70 percent by weight of ethylene selected from the group consisting of polyethylene, copolymers of ethylene and other halogen free copolymerizable monomers, and blends of polyethylene and other halogen free polymers about 1 to 5 parts by weight of lead stearate per 100 parts by weight of the polymer containing ethylene.
Claim 6
Independent Claim
88 words
A method of stabilizing the dielectric strength of polymeric compositions containing at least about 70 percent by weight of ethylene under wet conditions, comprising dispersing through a composition of at least one polymer containing at least about 70 percent by weight of ethylene selected from the group consisting of polyethylene, copolymers of ethylene and other halogen free copolymerizable monomers, and blends of polyethylene and other halogen free polymers about 1 to 5 parts by weight of lead stearate per 100 parts by weight of the polymer containing ethylene.
Claim 7
Dependent Claim
49 words
The method of stabilizing polymers containing ethylene of claim 4, wherein the lead stearate is dispersed through the polymeric composition containing at least about 70 percent by weight of ethylene in an amount of about 1.5 to 3 parts by weight per 100 parts of the polymer containing ethylene.
Claim 8
Independent Claim
35 words
A method of stabilizing the dielectric strength of polyethylene under wet conditions, comprising dispersing through the polyethylene about 1 to 10 parts by weight of lead stearate per 100 parts by weight of the polyethylene.
Claim 9
Independent Claim
35 words
A method of stabilizing the dielectric strength of polyethylene under wet conditions, comprising dispersing through the polyethylene about 1 to 10 parts by weight of lead stearate per 100 parts by weight of the polyethylene.
Claim 10
Dependent Claim
36 words
The method of stabilizing polyethylene of claim 6, wherein the lead stearate is dispersed through the polyethylene in an amount of about 1.5 to 5 parts by weight per 100 parts by weight of the polyethylene.
Claim 11
Dependent Claim
64 words
A dielectric polyolefin composition having a stabilized dielectric strength under wet conditions, consisting of a polyolefin of at least one polymeric composition containing ethylene selected from the group consisting of polyethylene and copolymers of ethylene and other halogen free polymerizable materials, having dispersed therein at least about 0.5 parts by weight of lead stearate per 100 parts by weight of the polymer containing ethylene.
Claim 12
Dependent Claim
64 words
A dielectric polyolefin composition having a stabilized dielectric strength under wet conditions, consisting of a polyolefin of at least one polymeric composition containing ethylene selected from the group consisting of polyethylene and copolymers of ethylene and other halogen free polymerizable materials, having dispersed therein at least about 0.5 parts by weight of lead stearate per 100 parts by weight of the polymer containing ethylene.
Claim 13
Dependent Claim
41 words
The stabilized dielectric polyolefin composition of claim 8, wherein the lead stearate is dispersed in the polymeric composition containing ethylene in an amount of about 1 to 10 parts by weight per 100 parts by weight of the polymer containing ethylene.
Claim 14
Dependent Claim
41 words
The stabilized dielectric polyolefin composition of claim 9, wherein the lead stearate is dispersed in the polymeric composition containing ethylene in an amount of about 1.5 to 5 parts by weight per 100 parts by weight of the polymer containing ethylene.
Claim 15
Dependent Claim
88 words
A dielectric polymer containing at least about 70 percent by weight of ethylene having a stabilized dielectric strength under wet conditions, consisting of a composition of at least one polymer containing at least about 70 percent by weight of ethylene selected from the group consisting of polyethylene, copolymers of ethylene and other halogen free copolymerizable monomers, and blends of polyethylene and other halogen free polymers, having dispersed therein about 1 to 10 parts by weight of lead stearate per 100 parts by weight of the polymer containing ethylene.
Claim 16
Dependent Claim
88 words
A dielectric polymer containing at least about 70 percent by weight of ethylene having a stabilized dielectric strength under wet conditions, consisting of a composition of at least one polymer containing at least about 70 percent by weight of ethylene selected from the group consisting of polyethylene, copolymers of ethylene and other halogen free copolymerizable monomers, and blends of polyethylene and other halogen free polymers, having dispersed therein about 1 to 10 parts by weight of lead stearate per 100 parts by weight of the polymer containing ethylene.
Claim 17
Dependent Claim
49 words
The stabilized dielectric polymer containing ethylene of claim 11, wherein the lead stearate is dispersed in the polymer containing at least about 70 percent by weight of ethylene in an amount of about 1.5 to 5 parts by weight per 100 parts by weight of the polymer containing ethylene.
Claim 18
Dependent Claim
35 words
A dielectric polyethylene having a stabilized dielectric strength under wet conditions, consisting of polyethylene having dispersed therein about 1 to 10 parts by weight of lead stearate per 100 parts by weight of the polyethylene.
Claim 19
Dependent Claim
35 words
A dielectric polyethylene having a stabilized dielectric strength under wet conditions, consisting of polyethylene having dispersed therein about 1 to 10 parts by weight of lead stearate per 100 parts by weight of the polyethylene.
Claim 20
Dependent Claim
35 words
The stabilized dielectric polyethylene of claim 13, wherein the lead stearate is dispersed through the polyethylene in an amount of about 1.5 to 5 parts by weight per 100 parts by weight of the polyethylene.
Claim 21
Dependent Claim
71 words
An electrical conductor with a polymeric insulation having a stabilized dielectric strength under wet conditions, comprising a metal conductor insulated with a polyolefin of at least one polymer composition containing ethylene selected from the group consisting of polyethylene and copolymers of ethylene and other halogen free polymerizable materials, having dispersed therein at least about 0.5 parts by weight of lead stearate per 100 parts by weight of the polymer containing ethylene.
Claim 22
Dependent Claim
71 words
An electrical conductor with a polymeric insulation having a stabilized dielectric strength under wet conditions, comprising a metal conductor insulated with a polyolefin of at least one polymer composition containing ethylene selected from the group consisting of polyethylene and copolymers of ethylene and other halogen free polymerizable materials, having dispersed therein at least about 0.5 parts by weight of lead stearate per 100 parts by weight of the polymer containing ethylene.
Claim 23
Dependent Claim
40 words
The conductor with stabilized insulation of claim 15, wherein the lead stearate is dispersed in the polymer containing ethylene in an amount of about 1 to 10 parts by weight per 100 parts by weight of the polymer containing ethylene.
Claim 24
Dependent Claim
40 words
The conductor with stabilized insulation of claim 16, wherein the lead stearate is dispersed in the polymer containing ethylene in an amount of about 1.5 to 5 parts by weight per 100 parts by weight of the polymer containing ethylene.
Claim 25
Dependent Claim
86 words
An electrical conductor with a polymeric insulation having a stabilized dielectric strength under wet conditions, comprising a metal conductor insulated with a composition of at least one polymer containing at least about 70 percent by weight of ethylene selected from the group consisting of polyethylene, copolymers of ethylene and other halogen free copolymerizable monomers, and blends of polyethylene and other halogen free polymers, having dispersed therein about 1 to 10 parts by weight of lead stearate per 100 parts by weight of the polymer containing ethylene.
Claim 26
Dependent Claim
86 words
An electrical conductor with a polymeric insulation having a stabilized dielectric strength under wet conditions, comprising a metal conductor insulated with a composition of at least one polymer containing at least about 70 percent by weight of ethylene selected from the group consisting of polyethylene, copolymers of ethylene and other halogen free copolymerizable monomers, and blends of polyethylene and other halogen free polymers, having dispersed therein about 1 to 10 parts by weight of lead stearate per 100 parts by weight of the polymer containing ethylene.
Claim 27
Dependent Claim
51 words
The conductor with stabilized insulation of claim 18, wherein the lead stearate is dispersed in the composition comprising a polymer containing at least about 70 percent by weight of ethylene in an amount of about 1.5 to 5 parts by weight per 100 parts by weight of the polymer containing ethylene.
Claim 28
Dependent Claim
43 words
An electrical conductor with a polymeric insulation having a stabilized dielectric strength under wet conditions, comprising a metal conductor insulated with polyethylene having dispersed therein about 1 to 10 parts by weight of lead stearate per 100 parts by weight of the polyethylene.
Claim 29
Dependent Claim
43 words
An electrical conductor with a polymeric insulation having a stabilized dielectric strength under wet conditions, comprising a metal conductor insulated with polyethylene having dispersed therein about 1 to 10 parts by weight of lead stearate per 100 parts by weight of the polyethylene.
Claim 30
Dependent Claim
36 words
The conductor with stabilized insulation of claim 20, wherein the lead stearate is dispersed through the polyethylene in an amount of about 1.5 to 5 parts by weight per 100 parts by weight of the polyethylene.
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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |