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US 12,142,395 B2Granted
Polymeric compounds for cable coatings and processes for producing same
AssigneeDow Global Technologies LLC
InventorsMohamed Esseghir, Anurima Singh
Life of this patent
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Abstract
Coated conductors having a conductor at least partially surrounded by a polymeric composition. The polymeric composition contains a broad-molecular-weight-distribution high-density ethylene-based polymer and a narrow-molecular-weight-distribution linear-low-density ethylene-based polymer, and has a density of at least 0.95 g/cm3. Also disclosed are processes for preparing the polymeric composition and for making the coated conductors. Further disclosed are articles of manufacture containing the same.
Claims10
A coated conductor, comprising:
- a conductor;
- and
- a polymeric composition at least partially surrounding the conductor,
- wherein the polymeric composition comprises:
- (a) a broad-molecular-weight-distribution (“broad-MWD”) high-density ethylene-based polymer, wherein the high-density ethylene-based polymer has a melt index ratio (I21/I2) of from 70 to 90 and
- (b) a narrow-molecular-weight-distribution (“narrow-MWD”) linear-low-density ethylene-based polymer, wherein the linear-low-density ethylene-based polymer has a melt index ratio (I12/I2) of from 25 to 45,
- wherein the broad-MWD high-density ethylene-based polymer is present in the polymer composition in an amount of at least 50 weight percent based on the entire weight of the polymeric composition,
- wherein the narrow-MWD linear-low-density ethylene-based polymer is present in the polymeric composition in an amount of at least 20 weight percent based on the entire weight of the polymeric composition,
- wherein the polymeric composition has a density of at least 0.95 g/cm3.
6 more elements
A process for producing a conductor jacket, the process comprising:
- blending a broad-molecular-weight-distribution (“broad-MWD”) high-density ethylene-based polymer with a narrow-molecular-weight-distribution (“narrow-MWD”) linear-low-density ethylene-based polymer to form a polymeric composition, wherein the high-density ethylene-based polymer has a melt index ratio (I21/I2) of from 70 to 90 and the linear-low-density ethylene-based polymer has a melt index ratio (I12/I2) of from 25 to 45;
- and
- extruding at least a portion of the polymeric composition over a conductor at a rate greater than 1.02 meters per second thereby forming the conductor jacket,
- wherein the broad-MWD high-density ethylene-based polymer is present in the polymer composition in an amount of at least 50 weight percent based on the entire weight of the polymeric composition,
- wherein the narrow-MWD linear-low-density ethylene-based polymer is present in the polymeric composition in an amount of at least 20 weight percent based on the entire weight of the polymeric composition,
- wherein the polymeric composition has a density of at least 0.95 g/cm3.
3 more elements
Dependencies are inferred from the claim text.