Patent US3956567A successfully refreshed from Google Patents.
US3956567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated high voltage wire coated with a flame retardant composition and process of preparing the same
Assignee: Millennium Petrochemicals Inc
•
Filing: 1975-01-30
•
Granted: 1976-05-11
•
Expires: 1995-01-30
Abstract
Abstract A flame retardant composition formed by blending both low density polyethylene and high density polyethylene with a plurality of fire retardant additives comprising 1,2,3,4,6,7,8,9,10,10,11,11-dodecachloro-1,4,4a,5a,6,9,9a,9b-octahydro-1,4,6,9,dimethanodibenzofuran and 5-(tetrabromophenyl)-1,2,3,4,7,7,-hexachloronorbornene. The composition may contain antimony compounds as well as other conventional additives. By employing such compositions as insulation coatings for high voltage electrical wire or cable outstanding improvements are achieved in meeting stringent flammability and high voltage cut-through specifications.
Inventors
- 👤 Joseph J. Krackeler
- 👤 William G. Biddell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:45
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H01B7/295; C; C08; C08K; C08K5/00; C08K5/02; C08K5/03; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/294; Y10T428/2942
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
A process for coating electrical wire which comprises extruding onto said wire a flame retardant polymeric composition comprising the following ingredients: a. about 45 to 85% of polymeric components comprising about 15 to 60% high density polyethylene and about 40 to 85% low density polyethylene; b. fire retardant components comprising about 2 to 20% by weight 1,2,3,4,6,7,8,9,10,10,11,11,-dodecachloro-1,4,4a,5a,6,9,9a, 9b-octahydro-1,4,6,9-dimethanodibenzofuran and about 2 to 30% by weight 5-(tetrabromophenyl)-1,2,3,4,7,7-hexachloro-norbornene in a parts by weight ratio of 1/1 to 1/1.86, respectively; and c. about 10 to 40% by weight of an antimony compound; wherein said polymeric composition is subjected during extrusion to a temperature at least above the melting point of the 5-(tetrabromophenyl)-1,2,3,4,7,7-hexachloro-norbornene.
Claim 2
Dependent Claim
109 words
A process for coating electrical wire which comprises extruding onto said wire a flame retardant polymeric composition comprising the following ingredients: a. about 45 to 85% of polymeric components comprising about 15 to 60% high density polyethylene and about 40 to 85% low density polyethylene; b. fire retardant components comprising about 2 to 20% by weight 1,2,3,4,6,7,8,9,10,10,11,11,-dodecachloro-1,4,4a,5a,6,9,9a, 9b-octahydro-1,4,6,9-dimethanodibenzofuran and about 2 to 30% by weight 5-(tetrabromophenyl)-1,2,3,4,7,7-hexachloro-norbornene in a parts by weight ratio of 1/1 to 1/1.86, respectively; and c. about 10 to 40% by weight of an antimony compound; wherein said polymeric composition is subjected during extrusion to a temperature at least above the melting point of the 5-(tetrabromophenyl)-1,2,3,4,7,7-hexachloro-norbornene.
Claim 3
Dependent Claim
25 words
In the process of claim 1 wherein said polymeric composition is subjected during extrusion to a temperature within the range of about 360° to 400°F.
Claim 4
Dependent Claim
15 words
In the process of claim 1 wherein an outer coating is extruded onto said wire.
Claim 5
Dependent Claim
13 words
In the process of claim 3 wherein said outer coating comprises polyvinyl chloride.
Claim 6
Dependent Claim
80 words
An insulated high voltage wire coated with a flame retarded polymeric composition comprising a. about 45 to 85% of polymeric components comprising about 15 to 60% high density polyethylene and about 40 to 85% low density polyethylene; b. fire retardant components comprising about 2 to 30% by weight 1,2,3,4,6,7,8,9,10,10,11,11-dodecachloro-1,4,4a,5a,6,9,9a,9b-octahydro-1,4,6,9,-dimethanodibenzofuran and about 2 to 30% by weight 5-(tetrabromophenyl)-1,2,3,4,7,7,-hexachloro-norbornene in a parts by weight ratio of 1/1 to 1/1.86, respectively; and c. about 10 to 40% by weight of an antimony compound.
Claim 7
Dependent Claim
80 words
An insulated high voltage wire coated with a flame retarded polymeric composition comprising a. about 45 to 85% of polymeric components comprising about 15 to 60% high density polyethylene and about 40 to 85% low density polyethylene; b. fire retardant components comprising about 2 to 30% by weight 1,2,3,4,6,7,8,9,10,10,11,11-dodecachloro-1,4,4a,5a,6,9,9a,9b-octahydro-1,4,6,9,-dimethanodibenzofuran and about 2 to 30% by weight 5-(tetrabromophenyl)-1,2,3,4,7,7,-hexachloro-norbornene in a parts by weight ratio of 1/1 to 1/1.86, respectively; and c. about 10 to 40% by weight of an antimony compound.
Claim 8
Dependent Claim
23 words
The insulated high voltage wire of claim 5 wherein an outer coating is applied, said outer coating comprising a flame resistant polymeric material.
Claim 9
Dependent Claim
15 words
The insulated high voltage wire of claim 6 wherein said outer coating comprises polyvinyl chloride.
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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |