US4787703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cable containing epoxy-modified encapsulation composition
Assignee: Deutsche Bank AG New York Branch
•
Filing: 1987-06-04
•
Granted: 1988-11-29
•
Expires: 2007-06-04
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 |