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| Number | Title | Issue Date |
| 6031129 | Use of pentavalent group VA oxides in acetic acid processing Methanol is converted to acetic acid by reaction with carbon monoxide in the presence of an improved carbonylation system which comprises a rhodium catalyst component and a liquid reaction medium containing water in low levels, acetic acid, methyl iodide,... | 02/29/2000 |
| 5817869 | Use of pentavalent Group VA oxides in acetic acid processing Methanol is converted to acetic acid by reaction with carbon monoxide in the presence of an carbonylation system which comprises a rhodium catalyst component and a liquid reaction medium containing acetic acid, methyl iodide, methyl acetate, and at least ... | 10/06/1998 |
| 5733480 | Semiconductive extrudable polyolefin compositions and articles Semiconductive polyolefin formulations are provided which are readily extrudable into films and coatings having low surface resistivity. The formulations of the invention are comprised of a polyethylene resin with 6 to 15 weight percent of a mixture of tw... | 03/31/1998 |
| 5705576 | Process for controlling production of in-situ thermoplastic polyolefins and products An improved gas-phase polymerization process for producing in-situ thermoplastic polyolefins in multiple reactors using high activity Ti/Al catalysts is provided. The improvement consists of developing a control parameter derived from eight integrated reg... | 01/06/1998 |
| 5681359 | Ethylene vinyl acetate and isobutylene terpolymer as a cold flow improver for distillate fuel compositions Terpolymers of ethylene, vinyl acetate and isobutylene as flow improvers in distillate fuels. The terpolymers have number average molecular weights in the range of about 1,600 to about 3,000, and weight average molecular weights in the range of about 4,00... | 10/28/1997 |
| 5670439 | Vanadium-containing catalyst system A vanadium-containing catalyst system particularly suited to the polymerization of olefin polymers. The catalyst system includes a supported, first catalyst component prepared by contacting silica with hexaalkyldisilazane and thereupon with (1) a compound... | 09/23/1997 |
| 5661095 | Olefin polymerization catalyst component supported on a copolymer of an olefin and an unsaturated silane A catalyst component useful in the polymerization of olefins which includes a support formed of a copolymer of an olefin and a silane monomer having at least one unsaturated hydrocaryl substitutent. A process for making the catalyst component as well as a... | 08/26/1997 |
| 5639818 | Peroxide modified PP/PE blends with superior melt strength The instant invention is directed to a process for preparing peroxide modified polypropylene/polyethylene blends that have superior extrusion coating properties. More specifically, the peroxide modified PP/PE blends produced by the instant invention exhib... | 06/17/1997 |
| 5610246 | Process for polymerizing propylene using a silica-supported catalyst A new catalyst useful in the polymerization of at least one olefin is disclosed. The catalyst comprises the product obtained by contacting silica, in random order, with (1) at least one hydrocarbon soluble magnesium-containing compound; and (2) a first mo... | 03/11/1997 |
| 5597865 | Adhesive blends for polystyrene Adhesive blends having special utility in the formation of composite structures with LDPE, EVOH, and impact-modified polystyrene comprise a mixture of an ethylene/ester copolymer such as EVA, polystyrene, such as impact-modified polystyrene, and a functio... | 01/28/1997 |
| 5587439 | Polymer supported catalyst for olefin polymerization The present invention is directed to a supported metallocene catalyst useful in the polymerization of -olefins which is obtained by tethering a metallocene catalyst component to the surface of a particulate, functionalized copolymeric support mater... | 12/24/1996 |
| 5587436 | Process for controlling the polymerization of propylene and ethylene and copolymer products An improved gas-phase copolymerization process for producing copolymers of propylene and ethylene in multiple reactors using high activity Ti/Al catalysts is provided. The improvement consists of developing a control parameter derived from eight integral ... | 12/24/1996 |
| 5574082 | Propylene polymer compositions having improved color and stabilizers therefor. Useful stabilizer combinations and propylene polymer compositions stabilized therewith having improved resistance to discoloration upon processing are provided. The stabilizer combinations of the invention are comprised of a mixture of calcium salts of st... | 11/12/1996 |
| 5534472 | Vanadium-containing catalyst system A vanadium-containing catalyst system particularly suited to the polymerization of blow moldable olefin polymers. The catalyst system includes a supported, first catalyst component prepared by contacting preheated silica, with (1) a compound or complex wh... | 07/09/1996 |
| 5525672 | Adhesive blends of modified anhydride-grafted polyolefins Anhydride-functionalized polymers are modified in accordance with the present invention by reacting all or a portion of the anhydride functionality with an aliphatic alcohol to convert the anhydride groups to half-esters. Half-esters produced by modifying... | 06/11/1996 |
| 5486333 | Blow molding extrusion die with rectangular slots A die for a blow molding machine has at least one circumferential rectangular cutout section contiguous with the die exit in at least the die ring or the mandrel. The rectangular cutout section expands the material flow channel between the die ring and th... | 01/23/1996 |
| 5486575 | High performance blow molding resins and process for their preparation A process is provided to improve the properties of polyethylene resins obtained from chromium catalyzed polymerizations and blow molded bottles produced therefrom. The process entails modifying the polyethylene resin by contacting the resin in a molten st... | 01/23/1996 |
| 5466648 | Supported alpha-olefin dimerization catalyst The present invention is directed to a supported tungsten-based catalyst composition useful for the dimerization of alpha-olefins including ethylene. More particularly, the catalyst composition of the instant invention comprises an organic or inorganic su... | 11/14/1995 |
| 5459201 | Impact strength, stress-whitening and bruise-resistance for impact modified polypropylene The present invention relates to a process for preparing high melt flow rate thermoplastic compositions that have improved impact and bruise-resistance properties and to the thermoplastic composition that are produced by the process of the instant inventi... | 10/17/1995 |
| 5439965 | Abrasion resistant crosslinkable insulation compositions Flame retardant and abrasion resistant crosslinkable compositions useful as insulation for wire and cable are provided. The compositions contain an ethylene-vinyl acetate copolymer having a vinyl ester content of 5 to 12 wt. %, a halogenated compound, ant... | 08/08/1995 |
| 5439974 | Propylene-based extrudable adhesive blends Adhesive blends especially suitable for adhesion to one or more polypropylene substrates consisting essentially of a mixture of a modified impact copolymer and a graft reaction product of a propylene polymer and a carboxylic acid or derivative thereof are... | 08/08/1995 |
| 5426153 | High impact strength film grade polymeric composition A polymeric composition including a first copolymer of ethylene and a higher -olefin having 3 to 12 carbon atoms, said first copolymer having a density of between 0.880 g/cc. and about 0.949 g/cc. and a melt index of between about 0.01 and about 10... | 06/20/1995 |
| 5424263 | Supported polymerization catalyst A catalyst component useful in the polymerization of olefins is disclosed. The catalyst component comprises the product obtained by steps of (a) contacting silica with at least one hydrocarbon soluble magnesium-containing compound; (b) contacting the prod... | 06/13/1995 |
| 5422386 | Process to simultaneously reactor-fill polyolefins and compatibilize fillers with polyolefins The present invention relates to a process to simultaneously reactor-fill polyolefins and to a compatibilized, reactor-filled polyolefin composite produced by the process of the instant invention. More specifically, the instant invention provides a proces... | 06/06/1995 |
| 5412025 | Method to reactor-fill polyolefins by employing a sticky prepolymer as a blending and compatibilizing agent The present invention relates to a process to in-situ reactor-fill polyolefins. More specifically, the instant invention provides a process to reactor-fill polyolefins comprising the steps of (a) adding a sufficient amount of alpha-olefin to a filler prio... | 05/02/1995 |
| 5412012 | Flame retardant insulation compositions having improved strippability The present invention relates to flame retardant insulation and jacketing compositions useful for wire and cable products which exhibit improved adhesion to the metal conductor. This is achieved by the use of a specific stabilizer package comprised of thr... | 05/02/1995 |
| 5412001 | Method to reactor-fill polyolefins by formation of a dual catalyst system causing compatibilization of the filler with the maxtrix polymer The present invention relates to a method to reactor-fill polyolefins and to reactor-filled composites obtained from the instant method. More specifically, the present invention relates to a method to reactor-fill polyolefins comprising the steps of (a) a... | 05/02/1995 |
| 5405817 | V/TI multi-site olefin polymerization catalyst Catalysts useful in olefin polymerization are a mixture of (a) a titanium-containing compound which is (i) Ti(Z1)t (OZ2)p-t, (ii) the product of reacting Z3 --Mg--N(--Z5)--Si(Z4)... | 04/11/1995 |
| 5401787 | Flame retardant insulation compositions Improved flame retardant moisture curable insulation compositions are comprised of an ethylene-alkoxysilane copolymer, a halogenated anhydride and antimony trioxide provided. The compositions have good processability and can be moisture cured to provide p... | 03/28/1995 |
| 5399540 | ZR/V multi-site olefin polymerization catalyst A catalyst useful in the polymerization of olefins, especially ethylene, is disclosed. The catalyst is obtained by admixing a zinc composition, a zirconium composition and a vanadium composition. The catalyst may be combined with a co-catalyst and, option... | 03/21/1995 |
| 5376742 | Monomer recovery in gas phase fluid bed olefin polymerization Unreacted monomer present in an ethylene/C3 -C8 alpha-olefin copolymer product produced in a catalyzed fluid bed polymerization process is purged with a gaseous stream obtained by subjecting a portion of the gaseous effluent from the... | 12/27/1994 |
| 5374597 | Vanadium based olefin polymerization catalyst Catalysts useful in olefin polymerization are a mixture of (a) (i) one or more compounds Zn(X1)2 and one or more compounds Al(R1)3, or (ii) Zn(X1)2.2Al(R1)3, wherein X... | 12/20/1994 |
| 5370941 | Laminates of 4-methylpentene-1 polymers and vinyl alcohol polymers and adhesives therefor Improved two-component blends which exhibit good adhesion to 4-methylpentene-1 polymers and vinyl alcohol polymers and which may be used as an adhesive interlayer when laminating layers of the polymers are provided. Ethylene-alkyl acrylate copolymers, pre... | 12/06/1994 |
| 5369194 | Olefin polymerization method A multiple site solid catalyst component capable of producing polyolefins having a broad or multimodal molecular weight distribution, such as a bimodal molecular weight distribution, is prepared by contacting a particulate solid support with a zirconium c... | 11/29/1994 |
| 5367022 | Grafted polymeric products, and adhesive blends Highly functional grafted polymeric products of a predominantly propylene polymeric composition containing a thermoplastic ethylene-propylene copolymer and a carboxylic acid or derivative grafting monomer and having a desirably low melt flow rate, adhesiv... | 11/22/1994 |
| 5349847 | Releasable stationary plate for rheometer A stationary plate assembly for a rheometer that selectively provides steady state and dynamic testing of melt viscoelastic characteristics of a material sample. The stationary plate assembly has a stationary sample plate magnetically coupled to its suppo... | 09/27/1994 |
| 5346872 | Cocatalyst for vanadium/titanium containing polymerization catalyst The present invention relates to a novel catalyst component for ethylene polymerization comprising vanadium and titanium. Moreover, when the vanadium/titanium containing catalyst of the present invention is employed with an aluminum-containing cocatalyst ... | 09/13/1994 |
| 5344886 | Process for making graft propylene polymers A process for making a graft propylene copolymer in which a propylene polymer, selected from the group consisting of propylene homopolymers and propylene copolymers, is contacted with a polymerizable, unsaturated carboxylic acid or acid derivative in the ... | 09/06/1994 |
| 5344803 | Cocatalyst for transition metal-containing -olefin polymerization catalyst The present invention is directed to a novel halosilane cocatalyst component which, when used in conjunction with an aluminum containing cocatalyst, is effective in increasing the activity of a supported magnesium/titanium containing catalyst in the polym... | 09/06/1994 |
| 5344888 | Process for making graft propylene polymers A process for making a graft propylene copolymer in which a propylene polymer, selected from the group consisting of propylene homopolymers and propylene copolymers, is contacted with a polymerizable, unsaturated carboxylic acid or acid derivative in the ... | 09/06/1994 |
