Abstract: A polyethylene composition comprising (A) an ethylene-based (co) polymer, (B) a styrenic unit-containing copolymer, and (C) a polyorganosiloxane. Also a method of making the composition; a crosslinked polyethylene product made by curing the composition; manufactured articles comprising a shaped form of the inventive composition or product; and methods of using the inventive composition, product, or articles.

Abstract: A cold shrink article comprising a shaped,stretched and cured composition comprising (i) a blend of silane-grafted ethylene-?-olefin elastomer and a hydroxyl-terminated polyorganosiloxane, (ii) a vinyl-terminated silicone rubber, and (iii) an ethylene-?-olefin elastomer.

Abstract: A cold shrink article made from a composition comprising (A) a silicone rubber; (B) an ethylene/?-olefin interpolymer; (C) a filler; and (D) an ?,?-unsaturated carboxylic acid. The composition may optionally include additives selected from the group consisting of plasticizer, peroxide curing agent, antioxidant, process additives, flame retardant and combinations thereof.

Abstract: A cold shrink article made from a composition comprising (A) an ethylene/?-olefin interpolymer; (B) a filler; and (C) an ?,?-unsaturated carboxylic acid. The composition may optionally include additives selected from the group consisting of plasticizer, peroxide curing agent, antioxidant, process additives, flame retardant and combinations thereof.

Abstract: A cold shrink article made from a composition comprising (A) an ethylene/?-olefin interpolymer; (B) a filler; and (C) an ?,?-unsaturated carboxylic acid. The composition may optionally include additives selected from the group consisting of plasticizer, peroxide curing agent, antioxidant, process additives, flame retardant and combinations thereof.

Abstract: A cold shrink article made from a composition comprising (A) a silicone rubber; (B) an ethylene/?-olefin interpolymer; (C) a filler; and (D) an ?,?-unsaturated carboxylic acid. The composition may optionally include additives selected from the group consisting of plasticizer, peroxide curing agent, antioxidant, process additives, flame retardant and combinations thereof.

Abstract: A cold shrink article comprising a shaped,stretched and cured composition comprising (i) a blend of silane-grafted ethylene-?-olefin elastomer and a hydroxyl-terminated polyorganosiloxane, (ii) a vinyl-terminated silicone rubber, and (iii) an ethylene-?-olefin elastomer.

Abstract: The present invention is an improved free-radical crosslinking process and free-radical crosslinking polymer compositions. The improved process delivers hotter processing conditions, faster crosslinking, or increased crosslinked densities. The crosslinkable polymeric composition comprises (1) a free-radical crosslinkable polymer, (2) a free-radical inducing species, and (3) a crosslinking-temperature-profile modifier.

Abstract: The present invention is a flame retardant composition comprising (a) a first ethylene polymer; (b) a second ethylene polymer having a density less than 0.95 grams/cubic centimeter and being modified with an unsaturated aliphatic diacid anhydride; (c) a flame retardant; and (d) an ultra high molecular weight polysiloxane. The invention also includes a coating prepared from the flame retardant composition as well as a wire-and-cable construction made by applying the coating over a wire or a cable. The invention also includes articles prepared from the flame retardant composition, such as extruded sheets, thermoformed sheets, infection-molded articles, coated fabrics, construction materials and automotive materials.

Abstract: The present invention is a flame-retardant composition comprising a polyolefin polymer, a nano-silicate, a metal hydroxide, and calcium carbonate. The invention also includes a coating prepared from the flame -retardant composition as well as a wire-and-cable construction made by applying the coating over a wire or a cable. The invention also includes articles prepared from the flame-retardant composition, such as extruded sheets, thermoformed sheets, injection-molded articles, coated fabrics, roofing membranes, and wall coverings.

Abstract: For a flame retardant came, it has been surprisingly found that an insulated conductor, having at least two insulation layers, a composite dielectric constant less than or equal to 2.6, and a composite dissipation factor less than or equal to 0.005, can be prepared even though one of the insulation layers has a dielectric constant greater than 2.6 or a dissipation factor greater than 0.005. It has also been surprisingly found that an insulated conductor, having a composite dielectric constant less than or equal to 2.6 and a composite dissipation. factor less than or equal to 0.005, can be prepared with a non-halo-enated polyolefin as an insulation layer polymer, where the polyolefin having relatively poor dielectric/dissipative properties and the insulation layer composition being substantially free of halogenated or antimony trioxide flame retardant additives.

Abstract: The present invention is a flame-retardant composition comprising a polyolefin polymer, a synthetic magadiite, and a flame retardant. The invention also includes a coating prepared from the flame-retardant composition as well as a wire-and-cable construction made by applying the coating over a wire or a cable. The invention also includes articles prepared from the flame-retardant composition, such as extruded sheets, thermoformed sheets, injection-molded articles, coated fabrics, roofing membranes, and wall coverings.

Abstract: Compositions including a polymer, a primary antioxidant, a secondary antioxidant, and a metal deactivator selected from at least one of 2,2?-oxamido bis[ethyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] and oxalyl bis(benzylidenehydrazide), are disclosed. The compositions can also include a light stabilizer. The compositions can be used to manufacture insulations for wire and cable. The compositions have improved long-term heat aging and also retain their color when exposed to heat. A method of making an insulation for a conductor, such as a wire or a cable, made from a composition is also provided.

Abstract: An improved process for crosslinking a polyolefin polymer is described. The process involves grafting a silane material onto the polyolefin based polymer in the presence of a free radical generating initiator material and then hydrolyzing the silane material to form crosslinks. By using an effective molar ratio of silane material to free radical of 40 or greater in the grafting reaction, premature crosslinking is controlled and the grafted polymer can be shaped first and then crosslinked. In another aspect of the invention, the crosslinking process is improved by adding a catalyst for the hydrolysis catalyst to the surface of a shaped article made from the grafted polymer. Grafted polymer and articles made from the grafted polymer, particularly fibers, are also disclosed.

Abstract: A filled thermoplastic olefin composition comprising (a) a first polypropylene having (i) substantially isotactic propylene sequences, (ii) a narrow molecular weight distribution, and (iii) a broad composition distribution, and (b) at least about 20 percent by volume filler based on the total volume of the composition. Optionally, the composition can comprise a second polypropylene different for the first polypropylene, both polypropylenes preferably propylene/?-olefin copolymers. The filler can be organic or inorganic, and the compositions are useful as, among other applications, protective coverings for wire and cable.