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US4787703A Expired / Lapsed US ⏱️ 0.0 years remaining

Cable containing epoxy-modified encapsulation composition

Assignee: Deutsche Bank AG New York Branch
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Filing: 1987-06-04
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Granted: 1988-11-29
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Expires: 2007-06-04
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Abstract

Abstract Epoxy-grafted, low molecular weight amorphous polymer compositions are employed in pourable, liquid telecommunication cable encapsulation compositions. Also disclosed is a method for encapsulating telecommunication cables as well as cables encapsulated with such an epoxy-grafted liquid encapsulant.

Inventors

  • 👤 Richard F. Tomko
  • 👤 Revati Ranganathan
  • 👤 William D. Sigworth
  • 👤 Dong-Hak Bae

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 20:16
CPC Classifications
C; C08; C08F; C08F255/00; C08F279/00; C08F279/02

Claims Analysis

Total Claims: 18
Claim 1
Independent Claim 190 words
A telecommunication cable segment having at least a portion thereof coated with a pourable liquid composition consisting essentially of: (A) a liquid graft polymer having a Brookfield viscosity of less than about 1,000,000 centipoise at 25° C., said graft polymer either possessing no melting transition peak or possessing a melting transition peak having a maximum value below 25° C. as measured by Differential Scanning Calorimetry; said graft polymer being comprised of: a polymeric backbone selected from the group consisting of polyalphaolefin, ethylene/alphaolefin, copolymer, ethylene/alphaolefin/non-conjugated polyene terpolymer, polyisoprene, polybutadiene, and alphaolefin/polyene copolymer; said polymeric backbone having grafted thereto a sufficient amount of at least one compound selected from the formulae: ##STR6## wherein R" is a C 2 -C 16 hydrocarbon radical containing an ethylenically unsaturated bond or a C 3 -C 12 radical containing one or more carbonyl groups and an ethylenically unsaturated double bond; ,and is hydrogen or C 1 -C 4 alkyl; such that said graft polymer is rendered crosslinkable; said graft polymer having a number average molecular weight of between about 500 and about 20,000; and (B) a sufficient amount of a suitable curative to cure the composition.
Claim 2
Dependent Claim 190 words
A telecommunication cable segment having at least a portion thereof coated with a pourable liquid composition consisting essentially of: (A) a liquid graft polymer having a Brookfield viscosity of less than about 1,000,000 centipoise at 25° C., said graft polymer either possessing no melting transition peak or possessing a melting transition peak having a maximum value below 25° C. as measured by Differential Scanning Calorimetry; said graft polymer being comprised of: a polymeric backbone selected from the group consisting of polyalphaolefin, ethylene/alphaolefin, copolymer, ethylene/alphaolefin/non-conjugated polyene terpolymer, polyisoprene, polybutadiene, and alphaolefin/polyene copolymer; said polymeric backbone having grafted thereto a sufficient amount of at least one compound selected from the formulae: ##STR6## wherein R" is a C 2 -C 16 hydrocarbon radical containing an ethylenically unsaturated bond or a C 3 -C 12 radical containing one or more carbonyl groups and an ethylenically unsaturated double bond; ,and is hydrogen or C 1 -C 4 alkyl; such that said graft polymer is rendered crosslinkable; said graft polymer having a number average molecular weight of between about 500 and about 20,000; and (B) a sufficient amount of a suitable curative to cure the composition.
Claim 3
Dependent Claim 28 words
The telecommunication cable segment of claim 1 wherein said graft polymer has a polymeric backbone selected from the group consisting of ethylene/alphaolefin copolymer, polyalphaolefin and ethylene/alphaolefin/nonconjugated polyene terpolymer.
Claim 4
Dependent Claim 27 words
The telecommunication cable segment of claim 2 wherein said graft polymer has a polymeric backbone selected from the group consisting of ethylene/propylene copolymer and ethylene/propylene/nonconjugated diene terpolymer.
Claim 5
Dependent Claim 24 words
The telecommunication cable segment of claim 3 wherein said graft polymer has a number average molecular weight of between about 750 and about 10,000.
Claim 6
Dependent Claim 24 words
The telecommunication cable segment of claim 4 wherein said graft polymer has a number average molecular weight of between about 1,000 and about 4,500.
Claim 7
Dependent Claim 29 words
The telecommunication cable segment of claim 3 wherein R" is a C 2 -C 12 hydrocarbon radical containing an ethylenically unsaturated bond or is an acrylate or methacrylate radical.
Claim 8
Dependent Claim 17 words
The telecommunication cable segment of claim 3 wherein said polymeric backbone has grafted thereto allyl glycidyl ether.
Claim 9
Dependent Claim 14 words
The telecommunication cable segment of claim 2 wherein said composition further comprises a diluent.
Claim 10
Dependent Claim 24 words
The telecommunication cable segment of claim 1 wherein said graft polymer has a Brookfield viscosity of less than about 500,000 centipoise at 25° C.
Claim 11
Dependent Claim 17 words
The telecommunication cable segment of claim 1 wherein said cable segment is composed of fiber optic filaments.
Claim 12
Dependent Claim 13 words
The telecommunication cable segment of claim 10 wherein said segment is a splice.
Claim 13
Dependent Claim 15 words
The telecommunication cable segment of claim 10 wherein said segment is an end block segment.
Claim 14
Dependent Claim 15 words
The telecommunication cable segment of claim 1 wherein said segment is comprised of metallic wires.
Claim 15
Dependent Claim 13 words
The telecommunication cable segment of claim 13 wherein said segment is a splice.
Claim 16
Dependent Claim 15 words
The telecommunication cable segment of claim 13 wherein said segment is an end block segment.
Claim 17
Dependent Claim 28 words
The telecommunication cable segment of claim 13 wherein said segment is a pressure block segment between an air pressurized metallic cable and a hydrocarbon grease filled metallic cable.
Claim 18
Dependent Claim 15 words
The telecommunication cable segment of claim 1 wherein said composition further comprises a cure accelerator.

References Cited (Backward Citations)

US3448174A Cited
US3974132A Cited
US4245061A Cited
US4222801A Cited
US4259540A Cited
US4217028A Cited
US4388202A Cited
US4703997A Cited
US4701015A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-11-29 1992-05-30 1992-11-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-11-29 1996-05-30 1996-11-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-11-29 2000-05-30 2000-11-29 $7700.00 Window Closed / Lapsed

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