Patent US5294968A successfully refreshed from Google Patents.
Patent EP0169987A1 successfully refreshed from Google Patents.
EP0169987A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Communications cables
Assignee: Millennium Petrochemicals Inc
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Filing: 1985-05-09
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Granted: —
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Expires: 2005-05-09
Abstract
Abstract An improved metallic screen (20,22) for use in electrical cable constructions (10), such as communications cables, is provided wherein the metallic screen (20, 22) is coated with a protective coating which comprises a layer of a polymer selected for its properties of high flexural modulus, high tensile strength and high melting point and an adhesive layer comprising a random, block or graft copolymer of an olefin and a polymerizable, ethylenically unsaturated carboxylic acid, acid anhydride, or derivative. Optionally, the adhesive layer may comprise a blend of the copolymer and a polyolefin.
Inventors
- 👤 Mitsuzo Shida
- 👤 John Machonis, Jr.
- 👤 Robert Jay Zeitlin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 20:48
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/02; H01B11/06; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2848; Y10T428/2852; Y10T428/2857; Y10T428/2878; Y10T428/2883; Y10T428/31504; Y10T428/31725; Y10T428/31736; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/3175; Y10T428/31757; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
153 words
A metallic screen (20, 22) for use in an electrical cable (10) having a conductive core (12, 14) wherein said screen (20, 22) extends through at least a portion of said core (12, 14), characterized in that said screen (20, 22) including a protective coating adhered to the surface thereof, said coating comprising a coextruded film of: (a) a layer of a polymer selected from the group consisting of polyamides, copolyamides and copolyesters and having properties of low flexural modulus, high tensile strength and high melting point selected to render the film resistant to buckling and thermal damage; and, (b) a layer of adhesive adhered directly to said screen surface, and to said polymer layer of (a) and comprising (i) a copolymer of an olefin and at least one comonomer comprising a polymerizable, ethylenically unsaturated carboxylic acid or acid anhydride or derivative thereof, or (ii) a blend of said copolymer with a polyolefin.
Claim 2
Dependent Claim
153 words
A metallic screen (20, 22) for use in an electrical cable (10) having a conductive core (12, 14) wherein said screen (20, 22) extends through at least a portion of said core (12, 14), characterized in that said screen (20, 22) including a protective coating adhered to the surface thereof, said coating comprising a coextruded film of: (a) a layer of a polymer selected from the group consisting of polyamides, copolyamides and copolyesters and having properties of low flexural modulus, high tensile strength and high melting point selected to render the film resistant to buckling and thermal damage; and, (b) a layer of adhesive adhered directly to said screen surface, and to said polymer layer of (a) and comprising (i) a copolymer of an olefin and at least one comonomer comprising a polymerizable, ethylenically unsaturated carboxylic acid or acid anhydride or derivative thereof, or (ii) a blend of said copolymer with a polyolefin.
Claim 3
Dependent Claim
33 words
The screen of claim 1, characterized in that said screen (20, 22) is of a metal chosen from the group consisting of chrome coated steel, chrome oxide coated steel, stainless steel, aluminum andcopper.
Claim 4
Dependent Claim
12 words
The screen of claim 2, characterized in that said metal is aluminum.
Claim 5
Dependent Claim
40 words
The screen of any one of claims 1 to 3, characterized in that said polymer of (a) ist a polyamide or copolyamide selected from the group consisting of nylon 6, a copolymer of nylon 6, nylon 11 or nylon 12.
Claim 6
Dependent Claim
12 words
The screenof claim 4, characterized in that said copolyamide is nylon 6/12.
Claim 7
Dependent Claim
20 words
The screen of any one of claims 1 to 3, characterized in that said polymer of (a) is a copolyester.
Claim 8
Dependent Claim
21 words
The screen of any one of claims 1 to 6, characterized in that said copolymer of (b) is a block copolymer.
Claim 9
Dependent Claim
21 words
The screen of any one of claims 1 to 6, characterized in that said copolymer of (b) is a random copolymer.
Claim 10
Dependent Claim
35 words
The screen of any one of claims 1 to 6, characterized in that said copolymer of (b) is a graft copolymer of an ethylene homopolymer or copolymer backbone and said comonomer is a grafting monomer.
Claim 11
Dependent Claim
25 words
The screen of claim 9, characterized in that said backbone comprises at least one ethylene homopolymer or copolymer of ethylene with an unsaturated aliphatic hydrocarbon.
Claim 12
Dependent Claim
29 words
The screen of claim 10, characterized in that said backbone comprises linear low density polyethylene or, alternatively, an ethylene homopolymer having a density of about 0.94 to 0.96 g/cc.
Claim 13
Dependent Claim
91 words
The screen of claim 9, characterized in that said grafting monomer is chosen from the group consisting of maleic acid or anhydride, itaconic acid or anhydride, 4-methyl cyclohex-4-ene-l,2-dicarboxylic acid or anhydride, bicyclo(2.2.2)oct-5-ene-2,3-dicarboxylic acid or anhydride, 1,2,3,4,5,8,9,10 octahydronaphthalene-2,3-dicarboxylic acid or anhydride, 2-oxa-l,3-diketos- piro(4.4)non-7-ene, bicyclo(2.2.1)hept-5-ene-2,3-dicarboxylic acid or anhydride, tetrahydrophthalic acid or anhydride, x-methylbicyclo(2.2.1)hept-5-ene-2,3-dicarboxylic acid or anhydride, x-methylnorborn-5- ene-2,3-dicarboxylic acid or anhydride, norborn-5-ene-2,3-dicarboxylic acid or anhydride, Nadic anhydride, methyl Nadic anhydride, Himic anhydride, methyl Himic anhydride, acrylic acid, methacrylic acid or derivatives thereof, fumaric acid, citric acid, citraconic acid, monoalkyl maleates and maleamic acids.
Claim 14
Dependent Claim
54 words
The screen of claim 12, characaterized in that said backbone is further grafted with a cograft monomer selected from the group consisting of dialkyl maleates, dialkyl fumarates, dialkyl itaconates, dialkyl mesaconates, dialkyl citraconates, alkyl acrylates, alkyl crotonates, alkyl tiglates, and alkyl methacrylates where alkyl is aliphatic, aryl-aliphatic or cycloaliphatic groups containing 1-12 carbon atoms.
Claim 15
Dependent Claim
32 words
The screen of any one of claims 1 to 6, characterized in that said adhesive layer of (b) is an adhesive blend and said polyolefin of (b) (ii) is an ethylene homopolymer.
Claim 16
Dependent Claim
15 words
The screen of claim 14, characterized in that said ethylene homopolymer is high density polyethylene.
Claim 17
Dependent Claim
31 words
The screen of any one of claims 1 to 6, characterized in that said adhesive layer of (b) is an adhesive blend and said polyolefin of (b) (ii) is a copolymer.
Claim 18
Dependent Claim
15 words
The screen of claim 16, characterized in that said copolymer is linear low density polyethylene.
Claim 19
Dependent Claim
36 words
The screen of claim 16, characterized in that said copolymer is an ethylene/ester copolymer selected from the group consisting of ethylene-vinyl acetate copolymers, ethylene-methyl acrylate copolymers, ethylene-ethyl acrylate copolymers, ethylene-methyl methacrylate copolymers and ethylene-ethyl methacrylate copolymers.
Claim 20
Dependent Claim
29 words
The screen of any one of claims 1 to 6, characterized in that said adhesive layer of (b) is an adhesive blend and further includes one or more elastomers.
Claim 21
Dependent Claim
83 words
The screen of claim 19, characterized in that said elastomer is chosen from the group consisting of homopolymers of isobutylene, copolymers of isobutylene, elastomeric copolymers of ethylene and 1-olefins, elastomeric terpolymer-s of ehtylene, 1-olefins and a diene, homopolymers of chloroprene, copolymers of a diene and a vinyl aromatic compound, block copolymers of a diene and a vinyl aromatic compound, hydrogenated block copolymers of a diene and a vinyl aromatic compound, homopolymers of butadiene, and copolymers of an ethylenically unsaturated nitrile and a diene.
Claim 22
Dependent Claim
35 words
The screen of claim 19, characterized in that said adhesive layer of (b) comprises a blend of a graft copolymer, a high density ethylene homopolymer or a copolymer of ehtylene with a 1-olefin, and polyisobutylene.
Claim 23
Dependent Claim
35 words
The screen of claim 21, characterized in that said blend comprises a graft copolymer of a high density polyehtylene backbone and x-methyl bicyclo (2.2.1) hept-5-ene-2,3-dicarboxylic acid or anhydride, a high density polyethylene homopolymer, and polyisobutylene.
Claim 24
Dependent Claim
50 words
The screen of claim 9, characterized in that said backbone of (b) is high density polyethylene or linear low density polyethylene and said grafting monomer ist selected from the group consisting of maleic acid or anhydride, fumaric acid or anhydride, x-methyl bicyclo-(2.2.1)hept-5-ene-2,3-dicarboxylic acid or anhydride, and bicyclo(2.2.1)hept-5-ene-2,3-dicarboxylic acid or anhydride.
Claim 25
Dependent Claim
27 words
The screen of any one of claims 1 to 23, characterized in that the flexural modulus of the polymer of (a) is less than about 200,000 psi.
Claim 26
Dependent Claim
24 words
The screen of claim 23 or 24, characterized in that the tensile strength of the polymer of (a) is greater than about 7000 psi.
References Cited (Backward Citations)
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