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US 4,787,703 AGranted
Cable containing epoxy-modified encapsulation composition
AssigneeUniroyal Chemical Company, Inc.
InventorsRichard F. Tomko, Revati Ranganathan, William D. Sigworth, Dong-Hak Bae
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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.
Claims17
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.degree. C., said graft polymer either possessing no melting transition peak or possessing a melting transition peak having a maximum value below 25.degree. 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.sub.2 -C.sub.16 hydrocarbon radical containing an ethylenically unsaturated bond or a C.sub.3 -C.sub.12 radical containing one or more carbonyl groups and an ethylenically unsaturated double bond;
- ,and
- is hydrogen or C.sub.1 -C.sub.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.
8 more elements
Dependencies are inferred from the claim text.