Method of filling a cable with a flooding compound
First Claim
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1. A method of filling a cable with a flooding compound comprising;
- (a) dissolving a wax soluble rubber in a microcrystalline wax at an elevated temperature between 220°
F. to 260°
F., said rubber comprising an ethylene-propylene copolymer;
(b) dissolving polyethylene in the mixture of step (a), and said wax being present in at least 90% by weight;
(c) extruding the mixture of step (b) at about said elevated temperature, between a metal sheath and a plastic cable covering of said cable, and wherein the extruded mixture has the jacket slip characteristics of atactic polypropylene as defined by the R.E.A. 15 lb. minimum test standard.
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Abstract
A flooding compound for a waterproof communications cable is formed from a heated mixture of 92-94% by weight of a microcrystalline wax, 3-5% polyethylene and 2-4% of a rubber. The heated mixture is extruded between the plastic jacket and core sheath of a cable. The compound exhibits the adhesive and slip characteristics of, and is a replacement for, atactic polypropylene.
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Citations
6 Claims
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1. A method of filling a cable with a flooding compound comprising;
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(a) dissolving a wax soluble rubber in a microcrystalline wax at an elevated temperature between 220°
F. to 260°
F., said rubber comprising an ethylene-propylene copolymer;(b) dissolving polyethylene in the mixture of step (a), and said wax being present in at least 90% by weight; (c) extruding the mixture of step (b) at about said elevated temperature, between a metal sheath and a plastic cable covering of said cable, and wherein the extruded mixture has the jacket slip characteristics of atactic polypropylene as defined by the R.E.A. 15 lb. minimum test standard. - View Dependent Claims (2)
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3. A method of filing a cable with a flooding compound comprising;
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(a) dissolving a wax soluble rubber in a microcrystalline wax at an elevated temperature; (b) dissolving polyethylene in the mixture of step (a), wherein the wax is present in at least 90% by weight; (c) extruding the mixture of step (b) at about said elevated temperature, between a metal sheath and a plastic cable covering of said cable, and wherein the extruded mixture has the jacket slip characteristics of atactic polypropylene as defined by the R.E.A. 15 lb. minimum test standard. - View Dependent Claims (4, 5, 6)
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Specification
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Current AssigneeSonneborn Holding, LLC
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Original AssigneeWitco Corporation (Lanxess AG)
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InventorsHindman, Thomas D., Burkhard, Joseph D., Roessing, Thomas J.
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Primary Examiner(s)Dawson, Robert A.
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Application NumberUS07/006,079Time in Patent Office410 DaysField of Search156/48, 156/244, 174/23 C, 174/23 R, 524/525, 524/488, 524/489, 523/173, 264/174US Class Current156/48CPC Class CodesC08L 2666/04 Macromolecular compounds ac...C08L 91/08 Mineral waxesH01B 3/30 plastics; resins; waxes
