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| Number | Title | Issue Date |
| 6248831 | High strength polyethylene film A process for production of a polyethylene blend in situ comprising contacting ethylene and at least one alpha-olefin with a magnesium/titanium based catalyst system including a partially activated precursor and a cocatalyst in each of two fluidized bed r... | 06/19/2001 |
| 6232377 | Flame retardant composition A flame retardant composition comprising (A) about 50 to about 95 percent by weight of at least one ethylene co-polymer selected from an ethylene/vinyl ester copolymer; ethylene/alpha, beta unsaturated carboxylate copolymer; and very low density ethylene/... | 05/15/2001 |
| 6232376 | Moisture curable polyolefin compositions A moisture curable polyolefin composition comprising: (a) a polyolefin, and for each 100 parts by weight of component (a), (b) 0.1 to 10 parts by weight of an unsaturated alkoxy silane; (c) 0.01 to 2 parts by weight of an organic peroxide; (d) 0.01 to 2 parts by weight ... | 05/15/2001 |
| 6231978 | Crosslinkable polyethylene composition A composition comprising: polyethylene; as a scorch inhibitor, 2,4-diphenyl-4-methyl-1-pentene; as a cure booster, 3,9-divinyl-2,4,8,10-tetra-oxaspiro[5.5]undecane; and an organic peroxide.... | 05/15/2001 |
| 6203907 | Tree resistant cable A composition comprising polyethylene and, for each 100 parts by weight of polyethylene, about 0.1 to about 3 parts by weight of the reaction product of (i) an aliphatic diacid anhydride or a polymer or copolymer thereof wherein the anhydride has 4 to 20 ... | 03/20/2001 |
| 6191230 | Polyethylene crosslinkable composition A masterbatch composition comprising: (a) a copolymer of ethylene and 1-octene prepared with a metallocene catalyst; (b) as a scorch inhibitor, a substituted hydroquinone; 4,4'-thiobis(2-methyl-6-t-butylphenol); 4,4'-thiobis(2-t-butyl-5-methylphenol); or ... | 02/20/2001 |
| 6187866 | Staged reactor process In a process for the in situ blending of polymers comprising contacting ethylene and one or more comonomers in two or more fluidized bed reactors with a catalyst system comprising (i) a magnesium/titanium based precursor containing an electron donor and (... | 02/13/2001 |
| 6187847 | Polyethylene crosslinkable composition A composition comprising: (a) polyethylene; (b) as a scorch inhibitor, [1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4, 6-(1H,3H,5H)-trione]; and (c) an organic peroxide.... | 02/13/2001 |
| 6187858 | Stabilized insulation composition A composition comprising: (a) polyethylene; (b) as a first antioxidant, a thiobisphenol; (c) as a second antioxidant, a compound containing 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate in the molecule; (d) as a third antioxidant, distearyl thiodipropionate; and (e)... | 02/13/2001 |
| 6184299 | Staged reactor process A process comprising contacting ethylene and at least one alpha-olefin comonomer having with a transition metal based catalyst system in two fluidized bed reactors connected in series, in the gas phase, under polymerization conditions, with the proviso th... | 02/06/2001 |
| 6180231 | Crosslinkable polyethylene composition A composition comprising: (a) polyethylene; (b) as a first scorch inhibitor, a substituted hydroquinone or 4,4'-thiobis(2-t-butyl-5-methyl phenol); (c) as a second scorch inhibitor, distearyl disulfide; and (d) an organic peroxide.... | 01/30/2001 |
| 6180706 | Crosslinkable high pressure low density polyethylene composition A composition comprising: (a) a low density homopolymer of ethylene prepared by a high pressure process; (b) a scorch inhibitor selected from the group consisting of a substituted hydroquinone; 4,4'-thiobis(2-methyl-6-t-butylphenol); 2,2'-thiobis(6-t-buty... | 01/30/2001 |
| 6177527 | Process for the preparation of polyethylene or polypropylene A process for the preparation of (i) polyethylene or (ii) polypropylene, which is essentially isotactic or a mixture of atactic and isotactic polypropylenes comprising contacting ethylene or propylene per se, or in admixture with one or more alpha-olefins... | 01/23/2001 |
| 6143822 | Polyethylene crosslinkable composition A composition comprising: (a) polyethylene; (b) as a scorch inhibitor, 1,1-diphenylethylene, substituted or unsubstituted; (c) optionally, a cure booster; and (d) an organic peroxide.... | 11/07/2000 |
| 6127441 | Expandable resin composition An expandable resin composition comprising: (A) 100 parts by weight of HDPE (high density polyethylene) having a DSC melting point of about 127 to about 136 degrees C.; a density of 0.945 to 0.967 gram per cubic centimeter; and a melt flow rate of about 0.1 to... | 10/03/2000 |
| 6127482 | Crosslinkable polyethylene composition A composition comprising: (a) polyethylene; (b) a cure booster selected from the group consisting of 3,9-divinyl-2,4,8,10-tetra-oxaspiro[5.5]undecane (DVS); a copolymer of ethylene and DVS; and an ethylene homopolymer or copolymer having DVS grafted there... | 10/03/2000 |
| 6124770 | Expandable resin composition An expandable resin composition comprising (A) HDPE (high density polyethylene); (B) a high pressure, low density homopolymer of ethylene (HP-LDPE); (C) polypropylene; (D) a polysiloxane-polyether block copolymer; and (E) a nucleating agent of azodicarbonamide and/or ta... | 09/26/2000 |
| 6120897 | Telephone cables An article of manufacture comprising (i) a plurality of electrical conductors, each surrounded by one or more layers of a composition comprising (a) one or more polyolefins and, bonded thereto or blended therewith, (b) a linear or cyclic organopolysiloxan... | 09/19/2000 |
| 6103374 | Crosslinkable polyolefin composition A composition comprising: (a) polyolefin; (b) as a scorch inhibitor, 4,4'-thiobis(2-methyl-6-t-butyl phenol); 2,2'-thiobis(6-t-butyl-4-methylphenol); or mixtures thereof; (c) hydroquinone; a substituted hydroquinone; or mixtures thereof in an amount sufficient... | 08/15/2000 |
| 6086792 | Cable semiconducting shields A semiconducting composition comprising (i) an olefinic polymer and (ii) about 25 to about 45 percent by weight, based on the weight of the composition, of a carbon black having the following properties: (a) a particle size of at least about 29 nanometers; (b)... | 07/11/2000 |
| 6022933 | Process for the preparation of polyethylene A process for preparing high density polyethylene in the gas phase comprising contacting a mixture comprising ethylene and one or more alpha-olefins with the supported reaction product of a bis-hydrocarbylsilyl chromate and a hydrocarbylaluminum compound ... | 02/08/2000 |
| 6020411 | Flame retardant resin composition A composition comprising: (i) a mixture of about 40 to about 80 percent by weight of a copolymer of ethylene and an alpha-olefin having a melt index in the range of about 0.1 to about 10 grams per 10 minutes and a density in the range of 0.870 to 0.930 gr... | 02/01/2000 |
| 5932691 | Process for devolatilization A process for the devolatilization of a thermoplastic polymer containing gaseous impurities in an apparatus having a melting zone, a mixing zone, and a reduced pressure zone, comprising: (a) (i) adding a granular blowing agent directly or via a masterbatch to ... | 08/03/1999 |
| 5925448 | Film extruded from a blend of ethylene copolymers A film comprising a blend of (i) a linear low density polyethylene and (ii) an in situ blend of copolymers of ethylene and one or more alpha-olefins having 3 to 8 carbon atoms wherein (a) the weight ratio of component (i) to component (ii) is in the range... | 07/20/1999 |
| 5919565 | Tree resistant cable A cable comprising one or more electrical conductors or a core of one or more electrical conductors, each conductor or core being surrounded by an insulating composition comprising a mixture of (i) about 20 to about 50 percent by weight of a homogeneous polyet... | 07/06/1999 |
| 5889087 | Flame retardant cable A cable comprising one or more electrical conductors or communications media, or a core of two or electrical conductors or communications media, each electrical conductor, communications medium, or core being surrounded by a composition comprising: (A) ab... | 03/30/1999 |
| 5837939 | Tree resistant cable A cable having one or more electrical conductors or a core of electrical conductors, each electrical conductor or core being surrounded by an insulating composition, essentially free from water tree growth inhibitors, having (i) a polyethylene having a de... | 11/17/1998 |
| 5807635 | Telephone cables A cable construction comprises the following components: (i) a plurality of insulated electrical conductors having interstices therebetween, said insulation comprising (a) one or more polyolefins selected from the group consisting of polyethylene, polypro... | 09/15/1998 |
| 5766761 | Telephone cables A cable construction comprising the following components: (i) a plurality of insulated electrical conductors having interstices therebetween, said insulation comprising (a) one or more polyolefins selected from the group consisting of polyethylene, polypr... | 06/16/1998 |
| 5744551 | High strength polyethylene film A blend comprising a mixture of two ethylene/alpha-olefin copolymers, said blend having a flow index in the range of about 5 to about 50 grams per 10 minutes; a melt flow ratio in the range of about 10 to about 50; a density in the range of 0.900 to 0.940... | 04/28/1998 |
| 5736258 | Film extruded from an in situ blend of ethylene copolymers A shrink film comprising a blend of copolymers of ethylene and one or more alpha-olefins having 3 to 12 carbon atoms formed in situ, said blend having a melt index in the range of about 0.2 to about 3.5 grams per 10 minutes; a melt flow ratio in the range... | 04/07/1998 |
| 5736237 | Geomembranes A sheet such as a geomembrane consisting essentially of an extruded in situ blend of two copolymers of ethylene and one or more alpha-olefins having 3 to 8 carbon atoms, said blend having a flow index in the range of about 3 to about 100 grams per 10 minu... | 04/07/1998 |
| 5731082 | Tree resistant cable A cable comprising one or more electrical conductors or a core of one or more electrical conductors, each conductor or core being surrounded by a layer of insulation comprising a multimodal copolymer of ethylene and one or more alpha-olefins, each alpha-o... | 03/24/1998 |
| 5728335 | Process for extrusion A process for the extrusion of polyethylene having a broad molecular weight distribution wherein the polyethylene is prepared in pellet form, said extrusion taking place in a pelletizing extruder having one or more zones essentially filled with polyethyle... | 03/17/1998 |
| 5716574 | Process for the production of power cable A process for the co-extrusion of an outer layer, a middle layer, and an inner layer, each layer including a thermoplastic resin, around a conductive medium in three extruders, one extruder for each layer, connected by a triple crosshead, each of said ext... | 02/10/1998 |
| 5707732 | Flame retardant cable A cable comprising one or more electrical conductors or communications media, or a core of two or more electrical conductors or communications media, each electrical conductor, communications medium, or core being surrounded by a composition, which is ess... | 01/13/1998 |
| 5698323 | Flame retardant cable A cable comprising one or more electrical conductors or communications media, or a core of two or more electrical conductors or communications media, each electrical conductor, communications medium, or core being surrounded by a composition, which is ess... | 12/16/1997 |
| 5677375 | Process for producing an in situ polyethylene blend A gas phase process for the production of an in situ polyethylene blend comprising contacting ethylene and at least one alpha-olefin comonomer having 3 to 8 carbon atoms with a magnesium/titanium based catalyst system including an activator and a cocataly... | 10/14/1997 |
| 5665818 | High activity staged reactor process A process comprising contacting ethylene and at least one alpha-olefin comonomer having 3 to 8 carbon atoms with a transition metal based catalyst system in two fluidized bed reactors connected in series, in the gas phase, under polymerization conditions,... | 09/09/1997 |
| 5643969 | Expandable resin composition A process for preparing an expandable resin composition comprising the following steps: (a) admixing, at a temperature in the range of about 120 to about 130 degrees C., the following components: (i) 100 parts by weight of a high pressure, low density homopoly... | 07/01/1997 |
