Cable containing epoxy-modified encapsulation composition
First Claim
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1. 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 C2 -C16 hydrocarbon radical containing an ethylenically unsaturated bond or a C3 -C12 radical containing one or more carbonyl groups and an ethylenically unsaturated double bond;
,andis hydrogen or C1 -C4 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.
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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.
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Citations
17 Claims
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1. A telecommunication cable segment having at least a portion thereof coated with a pourable liquid composition consisting essentially of:
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(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 C2 -C16 hydrocarbon radical containing an ethylenically unsaturated bond or a C3 -C12 radical containing one or more carbonyl groups and an ethylenically unsaturated double bond;
,andis hydrogen or C1 -C4 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification