Acyclic Hydrocarbon Is Ethylene Patents (Class 525/324)
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Patent number: 6015862Abstract: Functionalized terpolymers of two different .alpha.-olefin and para-alkylstyrene are disclosed, wherein the functionalized terpolymers have a substantially homogeneous compositional distribution represented by the formula: ##STR1## in which R.sub.1, R.sub.2, R' and R" independently, are hydrogen or a primary or secondary alkyl group; X is a functional group, such as --COOH, --OH, --SH, --NH.sub.2, --Cl, --Br, --M, --COOM (M =metals, e.g. Li, Na, K and Ca) and anhydrides; P is a polymer having a molecular weight of at least 500; Y is chemical linkage between polymer P and para-alkystyrene side chain; and the combination of a+b+c+d+e represents the empirical formula of a substantially random functional polymer; where both a and b are greater than 0; where the sum of a+b ranges from about 50 to 100,000; where each of c, d and e range from 0 to 10,000; where both d and e can not be 0; and where the sum of c+d+e is at least 1.Type: GrantFiled: October 23, 1998Date of Patent: January 18, 2000Assignee: The Penn State Research FoundationInventors: Tze-Chiang Chung, Honglan Lu
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Patent number: 5962594Abstract: Segmented polyolefins, which are produced by the reaction of mixtures of powdery polyolefins and polyolefin granulates with unsaturated monomers in the presence of thermally decomposing free radical-forming agents in continuous mixers in two consecutive reaction steps in the solid phase, a reaction step in a solid phase/melt transition phase and a melt homogenizing step, have a high strength and tenacity.The segmented polyolefins, as well as mixtures with conventional polyolefins, are suitable for the production of films, sheets, fibers, panels, coatings, pipes, hollow objects and foams.Type: GrantFiled: May 27, 1998Date of Patent: October 5, 1999Assignee: Borealis AGInventors: Manfred Raetzsch, Hartmut Bucka, Achim Hesse, Norbert Reichelt
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Patent number: 5942586Abstract: Catalyst for the polymerization of olefins, process for its preparation, and its use.The present invention relates to a supported catalyst for the polymerization of olefins, which can be prepared by reacting the reaction product formed from an aluminoxane and at least one metallocene with a microporous, polymeric support.Type: GrantFiled: June 7, 1995Date of Patent: August 24, 1999Assignee: Targor GmbHInventors: Hans-Friedrich Herrmann, Bernd Bachmann, Bernhard Hierholzer, Walter Spaleck
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Patent number: 5891963Abstract: Disclosed herein are processes for polymerizing ethylene, acyclic olefins, and/or selected cyclic olefins, and optionally selected olefinic esters or carboxylic acids, and other monomers. The polymerizations are catalyzed by selected transition metal compounds, and sometimes other co-catalysts. Since some of the polymerizations exhibit some characteristics of living polymerizations, block copolymers can be readily made. Many of the polymers produced are often novel, particularly in regard to their microsructure, which give some of them unusual properties. Numerous novel catalysts are disclosed, as well as some novel processes for making them. The polymers made are useful as elastomers, molding resins, in adhesives, etc. Also described herein is the synthesis of linear .alpha.-olefins by the oligomerization of ethylene using as a catalyst system a combination a nickel compound having a selected .alpha.-diimine ligand and a selected Lewis or Bronsted acid, or by contacting selected .alpha.Type: GrantFiled: July 10, 1997Date of Patent: April 6, 1999Assignees: E. I. du Pont de Nemours and Company, University of North CarolinaInventors: Maurice S. Brookhart, Lynda Kaye Johnson, Christopher Moore Killian, Samuel David Arthur, Elizabeth Forrester McCord, Stephan James McLain
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Patent number: 5849847Abstract: Polyalkenylaromatic-polyethylene copolymers are prepared using protected functional organolithium initiators. Polymerization of an alkenylsubstituted aromatic monomer followed by ethylene, results in a protected functional block polystyrene-co-polyethylenyllithium. Termination with a functionalizing agent followed by deprotection produces polymeric products with high functionalization at the initiating chain-end and at least partial functionalization at the terminal chain-end.Type: GrantFiled: July 29, 1996Date of Patent: December 15, 1998Assignee: FMC CorporationInventor: Roderic P. Quirk
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Patent number: 5798420Abstract: This invention relates to block polymers containing both crystalline and elastomeric blocks, the block copolymer having an A block and a B block. The A block is a polyethylene or an ethylene polymer optionally containing an alpha-olefin and optionally a non-conjugated diene, and is generally crystalline. The B block is an ethylene, .alpha.-olefin copolymer. Also disclosed is a process for manufacture of the block copolymers and methods for coupling the block copolymers. Coupled block copolymers are useful as thermoplastic elastomers exhibiting physical properties approaching those of crosslinked EP or EPDM elastomers, but showing thermal processability after coupling. The block copolymers of the present invention may also be used as a lubricant or fuel additive, as a plastics blend component, and as a component in hot melt adhesives.Type: GrantFiled: May 19, 1997Date of Patent: August 25, 1998Assignee: Exxon Chemical Patents, Inc.Inventors: Charles Cozewith, Gary William Ver Strate, Roger K. West, Gaetano A. Capone
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Patent number: 5780570Abstract: Process with two or more steps for the preparation in suspension of mixtures of ethylene-propylene (EPM) elastomer homopolymers or ethylene-propylene-diene (EPDM) elastomer terpolymers in the presence of a catalytic system essentially consisting of a compound of Vanadium and a cocatalyst essentially consisting of an Aluminum alkyl and in the presence of an activator, the above process being characterized in that:a) in the first step a first polymerization of the monomers is carried out in the presence of the Vanadium based catalyst;b) in the second or subsequent steps further polymerizable monomers and activator are added to the suspension of the polymer obtained in step (a).Type: GrantFiled: March 27, 1997Date of Patent: July 14, 1998Assignee: Enichem S.p.A.Inventor: Tiziano Tanaglia
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Patent number: 5744551Abstract: 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 gram per cubic centimeter; a molecular weight in the range of about 98,000 to about 190,000; and an Mw/Mn ratio in the range of about 2 to about 8, said blend having been prepared by mixing first and second copolymers having about equal molecular weights, each copolymer being a copolymer of ethylene and an alpha-olefin having 3 to 8 carbon atoms, the first copolymer having a flow index in the range of about 5 to about 75 grams per 10 minutes; a melt flow ratio in the range of about 10 to about 50; a density in the range of 0.860 to 0.Type: GrantFiled: March 28, 1997Date of Patent: April 28, 1998Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Sandra Ann Kupperblatt, Michael William Tilston, George Edward Ealer
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Patent number: 5741861Abstract: A resin composition containing 50 to 99% by weight of component A, which is a copolymer of ethylene and .alpha.-olefin, and 1 to 50% by weight of component B, which is a high-pressure low-density polyethylene. The component A has (a) a melt flow rate (MFR) of 2 to 30 g/10 min., (b) a density of not more than 0.935 g/cm.sup.3, and (c) a single peak of elution volume indicated by an elution curve obtained by temperature rising elution fractionation, the peak corresponding to a temperature within a range of from 20.degree. C. to 85.degree. C., and the elution curve satisfying a relationship in which the ratio H/W is not less than 1 when H represents the height of the peak and W represents the width of the elution curve at half of the height H. The component B has (a') a melt flow rate of 0.1 to 20 g/10 min., (b') a density of 0.915 to 0.93 g/cm.sup.3, ('c) a memory effect (ME) of not less than 1.6, and (d') a melt tension (MT) of not less than 1.5 g.Type: GrantFiled: March 23, 1995Date of Patent: April 21, 1998Assignee: Mitsubishi Chemical CorporationInventors: Koji Yamamoto, Hajime Ikeno, Keiko Shichijo
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Patent number: 5733980Abstract: This invention relates to block polymers containing both crystalline and elastomeric blocks, the block copolymer having an A block and a B block. The A block is a polyethylene or an ethylene polymer optionally containing an alpha-olefin and is generally crystalline. The B block contains an ethylene, .alpha.-olefin copolymer segment and optionally contain an ethylene, .alpha.-olefin, non-conjugated diene terpolymer segment. If the B block contains a diene containing segment, the diene containing segment is furthest from the junction of the A and the B blocks. Also disclosed is a process for manufacture of the block copolymers and methods for coupling the block copolymers. Coupled block copolymers are useful as thermoplastic elastomers exhibiting physical properties approaching those of crosslinked EP or EPDM elastomers, but showing thermal processability after coupling.Type: GrantFiled: September 22, 1995Date of Patent: March 31, 1998Assignee: Exxon Chemical Patents Inc.Inventors: Charles Cozewith, Gary William Ver Strate, Roger K. West, Gaetano A. Capone
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Patent number: 5705565Abstract: Substantially linear ethylene polymers, e.g., polyethylenes prepared by constrained geometry catalysis (substantially linear ethylene), which are grafted with one or more unsaturated organic compounds containing both ethylenic unsaturation and a carbonyl group, e.g., maleic anhydride, exhibit desirable adhesive properties. These graft-modified substantially linear ethylene polymers also impart desirable compatibility and impact properties to various thermoplastic polymer blends.Type: GrantFiled: September 9, 1994Date of Patent: January 6, 1998Assignee: The Dow Chemical CompanyInventors: Morgan M. Hughes, Kyle G. Kummer, Stephen R. Betso, Michael E. Rowland, Morris S. Edmondson
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Patent number: 5703170Abstract: A novel high performance pressure sensitive adhesive composition is provided comprised of a phase separated graft copolymer comprised of a polymerized acrylic or methacrylic acid ester backbone having grafted thereon pendant polymeric moieties such as polystyrene or poly-alpha-methylstyrene. The average number of carbon atoms present in the ester portion of the backbone ranges from 2.5 to 3.5. The composition is non-corrosive and has a low volatile content.Type: GrantFiled: January 17, 1997Date of Patent: December 30, 1997Assignee: Adhesives Research, Inc.Inventors: Michael J. Zajaczkowski, Barbara A. Stutzman
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Patent number: 5693719Abstract: An ethylene polymer which is useful for molding inflation film having a particularly excellent moldability is provided.The ethylene polymer is obtainable by the first and second steps and satisfying the following conditions (a) to (d):(a) the polymer produced in the first polymerization step having an weight average molecular weight (Mw,.sub.1) in the range of 6.times.10.sup.5 to 4.times.10.sup.6 ;(b) the ratio (Mw,.sub.2 /Mw,.sub.1) of the weight average molecular weight of the polymer produced in the first polymerization step (Mw,.sub.1) and the weight average molecular weight of the polymer produced in the second polymerization step (Mw,.sub.2) being in the range of 0.7 to 1.4;(c) the molecular weight in which the integration fraction from the low molecular weight is equal to 1/2 of the weight fraction (W.sub.2) of the polymer produced in the second polymerization step being in the range of 5.times.10.sup.3 to 3.times.10.sup.4 ; and(d) the weight fraction (W.sub.Type: GrantFiled: December 15, 1995Date of Patent: December 2, 1997Assignee: Mitsubishi Chemical CorporationInventors: Yukitaka Goto, Nobuaki Sakurai, Tadashi Takahashi, Katsumi Hirakawa, Yoichi Maeda, Yoshihiko Sasaki, Satoshi Nishimura, Masataka Souda
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Patent number: 5688865Abstract: A process and system for prevention of fouling of pressure taps in a first gas phase fluidized bed polymerization reactor while avoiding sheeting during production of polyolefins in a second downstream gas phase fluidized bed polymerization reactor wherein a relatively small amount of water is added directly to the pressure taps of the first reactor.Type: GrantFiled: September 4, 1992Date of Patent: November 18, 1997Assignee: Mobil Oil CorporationInventors: Ahmed H. Ali, Robert O. Hagerty
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Patent number: 5677375Abstract: 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 cocatalyst in each of two fluidized bed reactors corrected in series, under polymerization conditions, with the provisos that:(a) the mixture of ethylene copolymer matrix and active catalyst formed in the first reactor in the series is transferred to the second reactor in the series;(b) other than the active catalyst referred to in proviso (a) and the cocatalyst referred to in proviso (f), no additional catalyst is introduced into the second reactor;(c) in the first reactor in which a relatively high molecular weight copolymer is made:(1) the alpha-olefin is present in a ratio of about 0.01 to about 0.4 mole of alpha-olefin per mole of ethylene; and(2) optionally, hydrogen is present in a ratio of about 0.001 to about 0.Type: GrantFiled: March 29, 1996Date of Patent: October 14, 1997Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Mahmoud R. Rifi, Carlo F. Martino
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Patent number: 5674630Abstract: Polypropylene impact copolymer compositions are provided which contain a homopolymer phase of predominantly homopolymeric polypropylene, a copolymer phase of copolymerized ethylene and propylene, and a nucleating agent. The inventive compositions have a rubber content (Fc) in the range of 25 to 45% by weight, a crystallization temperature in the range of 122.degree. to 132.degree. C., a melt flow in the range of about 7 to about 60 dg/min, and a ratio of the intrinsic viscosity of the copolymer phase to the intrinsic viscosity of the homopolymer phase of 1.4 to about 1.9. The polypropylene impact copolymer compositions may be used to form cast films which preferably are soft, quiet, and suitable for use in products to be used next to the skin, such as diapers, adult incontinence pads and feminine hygiene products.Type: GrantFiled: May 8, 1995Date of Patent: October 7, 1997Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventor: Ananda M. Chatterjee
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Patent number: 5629080Abstract: Thermobondable fiber of at least one first component of polypropylene having a melt flow rate of 0.5-30, and at least one second component of polypropylene having a melt flow rate of 60-1000.Type: GrantFiled: January 13, 1993Date of Patent: May 13, 1997Assignee: Hercules IncorporatedInventors: Rakesh K. Gupta, James E. Mallory, Kunihiko Takeuchi
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Patent number: 5620760Abstract: Shaped articles for biomedical use characterized by a good transparency and flexibility also at low temperatures are prepared starting from elastomeric copolymers of ethylene with propylene and/or other alpha-olefins having a unique set of mechanical properties and thermoplastic processability. Of particular interest are devices for containing, administering, draining and transport of blood and biological and physiological fluids, syringe seals and similar applications.Type: GrantFiled: November 14, 1995Date of Patent: April 15, 1997Assignee: Montell Technology Company BVInventors: Maurizio Galimberti, Emilio Martini, Enrico Albizzati
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Patent number: 5608009Abstract: There are herein disclosed an olefin copolymer which comprises an olefin unit and a diolefin unit and in which a weight-average molecular weight is in the range of 200 to 800,000, the content of the diolefin unit is in the range of 0.002 to 30 mol%, and a ratio TUS/DOU between the total content of unsaturated groups observed in a molecular chain (TUS mol%) and the content of the diolefin unit (DOU mol%) is in the range of 0.001 to 200; an olefin graft copolymer obtained by the graft polymerization of this olefin copolymer and an olefin; a hydrogenated olefin copolymer and olefin graft copolymer thereof; and a process for preparing these copolymers.These olefin copolymers are excellent in molding/working properties and have a good thermal stability, transparency and uniformity. Therefore, they are useful as a high-performance VLDPE, LDPE, L-LDPE and HDPE, and further useful as a novel branched propylene polymer, a thermoplastic elastomer, a compatibilizing agent for other resins, and the like.Type: GrantFiled: April 28, 1995Date of Patent: March 4, 1997Assignee: Idemitsu Kosan Co., Ltd.Inventors: Shuji Machida, Haruo Shikuma, Toshinori Tazaki, Tomio Tatsumi, Shinichi Kurokawa
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Patent number: 5605969Abstract: In accordance with the present invention, there is provided a method for the preparation of an ethylene polymer composition having a density of 0.86-0.94 g/cm.sup.3 and an intrinsic viscosity [.eta.] of 1-6 dl/g using an olefin polymerization catalyst composed of a transition metal compound containing a ligand having a cycloalkadienyl skeleton and an organoaluminium oxy-compound, and there is also provided a method for the preparation of an ethylene polymer composition having density of 0.87-0.93 g/cm3 and an intrinsic viscosity [.eta.] of 0.5-6 dl/g.Type: GrantFiled: October 25, 1993Date of Patent: February 25, 1997Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Toshiyuki Tsutsui, Takashi Ueda
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Patent number: 5589544Abstract: The invention relates to a soft thermoplastic elastomeric composition having improved resistance to oil swell and compression set comprising a blend of an engineering thermoplastic resin, a cured rubber concentrate and optionally a compatibilizer and a method for its preparation. The invention further relates to the cured rubber concentrate, a method for its preparation and the use thereof.Type: GrantFiled: May 15, 1995Date of Patent: December 31, 1996Assignee: Advanced Elastomer Systems, L.P.Inventor: Jacques Horrion
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Patent number: 5589539Abstract: A process for the production of an in situ particulate polyethylene blend comprising contacting a magnesium/titanium based catalyst system including a particulate precursor with one or more alpha-olefins in each of two or more reactors connected in series, in the gas phase, under polymerization conditions, with the provisos that:(a) the particulate precursor has a particle size distribution span of no greater than about 1.Type: GrantFiled: November 23, 1994Date of Patent: December 31, 1996Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Burkhard E. Wagner, Arakalgud V. Ramamurthy
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Patent number: 5563118Abstract: An additive composition comprising a graft and derivatized copolymer prepared from ethylene and at least one (C.sub.3 -C.sub.10) alpha- monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes comprising from about 15 to 80 mole percent of ethylene, from about 20 to 85 mole percent of said (C.sub.3 -C.sub.10) alpha- monoolefin and from about 0 to 15 mole percent of said polyene having an average molecular weight ranging from about 5,000 to 500,000, which has been reacted with at least one olefinic carboxylic acid acylating agent to form one or more acylating reaction intermediates characterized by having a carboxylic acid acylating function within their structure and reacting said reaction intermediate with an amino-aromatic compound to form said graft derivatized copolymer, and a lubricating oil composition containing same are provided.Type: GrantFiled: June 6, 1995Date of Patent: October 8, 1996Assignee: DSM Copolymer, Inc.Inventors: Munmaya K. Mishra, Isaac D. Rubin
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Patent number: 5561196Abstract: This invention relates to grafted polypropylene compositions and a process for their production. More particularly, the invention relates to polypropylene compositions based on polypropylene homopolymers, and copolymers of propylene with ethylene and/or butadiene, grafted with certain epoxy-alkyl acrylate compounds, and a process for their production. The grafted polypropylene compositions are useful especially as compatibilizers for addition to other polymer compositions.Type: GrantFiled: July 13, 1995Date of Patent: October 1, 1996Assignee: Den norske stats oljeselskap a.s.Inventors: Hans K. Kotlar, Per M. Hansen
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Patent number: 5525678Abstract: A bimetallic catalyst produces broad or bimodal molecular weight distribution polyolefin resin whose composition depends on the ratio of the concentration of the two metals of the catalyst producing the HMW and LMW components. The bimetallic catalyst produces a broad/bimodal MWD resin whose HMW and LMW components depend on the relative productivity of each of the transition metal sites of the catalyst. Water and/or carbon dioxide are cofed to the polymerization reactor at levels necessary to modify the weight fractions of the HMW and LMW components, thus achieving a target molecular weight distribution, MWD. The invention allows the resin MWD to be adjusted in the reactor. The weight fraction of the high molecular weight component decreases with the addition of the water and or the carbon dioxide and the FI of the overall product increases with a decrease in the HMW component weight fraction in the product.Type: GrantFiled: September 22, 1994Date of Patent: June 11, 1996Assignee: Mobil Oil CorporationInventors: Robert I. Mink, Thomas E. Nowlin, Pradeep P. Shirodkar, Sandra D. Schregenberger, Grace O. Tsien
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Patent number: 5519091Abstract: In accordance with the present invention, there is provided a method for the preparation of an ethylene polymer composition having a density of 0.86-0.94 g/cm.sup.3 and an intrinsic viscosity [.eta.] of 1-6 dl/g using an olefin polymerization catalyst composed of a transition metal compound containing a ligand having a cycloalkadienyl skeleton and an organoaluminium oxy-compound, and there is also provided a method for the preparation of an ethylene polymer composition having density of 0.87-0.93 g/cm3 and an intrinsic viscosity [.eta.] of 0.5-6 dl/g.Type: GrantFiled: May 31, 1995Date of Patent: May 21, 1996Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Toshiyuki Tsutsui, Takashi Ueda
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Patent number: 5516849Abstract: The present invention provides a continuous process for producing an adducted derivatized EPM or EPDM oil solution in which a grafted ethylene polymer is adducted with an antioxidant diamine for formation of an adduct during holding.Type: GrantFiled: October 6, 1994Date of Patent: May 14, 1996Assignee: DSM Copolymer, Inc.Inventors: Tony L. Caines, Michael L. Junker
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Patent number: 5514455Abstract: A film comprising a blend of copolymers, which has been (i) extruded to a gauge in the range of about 0.3 to about 0.9 mil, said film having an Elmendorf Tear Strength in the machine direction of at least about 25 grams per mil greater than the Elmendorf Tear Strength in the machine direction of the same blend of copolymers, which has been extruded to a gauge of one mil, or (ii) extruded to a heavy gauge of at least about 5 mils and then biaxially oriented and reduced to a gauge of about 1.5 mils or less, first in the machine direction at a gauge reduction ratio of at least about 2:1, and then in the transverse direction at a gauge reduction ratio of at least about 1.5:1, said blend having been produced in situ by contacting ethylene and at least one alpha-olefin comonomer having 3 to 8 carbon atoms with a magnesium/titanium based catalyst system in each of two reactors connected in series, under polymerization conditions.Type: GrantFiled: July 8, 1994Date of Patent: May 7, 1996Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: William J. Michie, Jr., Guylaine St. Jean
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Patent number: 5514761Abstract: Disclosed are unsaturated .alpha.-olefin/.alpha., .omega.-diene copolymers, and a method of preparation thereof. The copolymers are generally crystalline, free of gel and cross-links, and contain unsaturated side chains and long chain branching. The copolymers contain up to 5 mole percent diene incorporated therein, and may be prepared by copolymerization using a solid-phase, insoluble coordination catalyst, without a solvent, and below the crystalline melting point of the copolymer.Type: GrantFiled: February 10, 1995Date of Patent: May 7, 1996Assignee: Exxon Chemical Patents Inc.Inventors: Bradley P. Etherton, James J. McAlpin, Terrence Huff, Edward N. Kresge
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Patent number: 5503914Abstract: A film comprising a blend of copolymers, which has been extruded (i) to a film having a gauge of less than about 1.8 mils; a dart impact strength of at least about 80 grams per mil at a density of 0.926 gram per cubic centimeter; and a dart impact strength of at least about 480 grams per mil at a density of 0.918 gram per cubic centimeter and/or (ii) to a film having a gauge of less than about 5 mils, and a blocking force of less than about 120 grams and a COF in the range of about 0.2 to about 0.5, said blend having been produced in situ by contacting ethylene and at least one alpha-olefin comonomer with a magnesium/titanium based catalyst system in each of two reactors connected in series, under polymerization conditions, wherein the polymer formed in the high molecular weight reactor has a flow index in the range of about 0.01 to about 30 grams per 10 minutes and a density in the range of about 0.860 to about 0.Type: GrantFiled: July 8, 1994Date of Patent: April 2, 1996Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: William J. Michie, Jr., George E. Ealer, Guylaine St. Jean, Charles J. Sakevich, Diane J. Rickman-Davis
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Patent number: 5464905Abstract: An ethylene/.alpha.-olefin copolymer composition containing a first and second ethylene/.alpha.-olefin copolymer is disclosed. The first ethylene/.alpha.-olefin copolymer is prepared in the prsence of a polymerization catalyst containing an organoaluminum oxy compound and at least two kinds of metallocene compounds (b) and the second ethylene/.alpha.-olefin copolymer, which differs from the first in at least one physical property, is prepared in the presence of a polymerization catalyst containing an organoaluminum oxy compound and a metallocene compound (b'). The ethylene/.alpha.-olefin copolymer composition has excellent moldability and heat stability properties and forms films having high transparency and mechanical strength.Type: GrantFiled: November 18, 1993Date of Patent: November 7, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Toshiyuki Tsutsui, Ken Yoshitsugu, Mamoru Takahashi, Akira Todo, Seiji Ohta, Hajime Inagaki
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Patent number: 5459203Abstract: A catalyst system for the polymerization of alpha-olefins comprising a chromium-containing catalyst and an yttrium-containing catalyst wherein the yttrium-containing catalyst is represented by the formula (Cp.sub.2 YX.sub.x).sub.y .multidot.M.sub.z L.sub.n, wherein Cp is cyclopentadienyl or cyclopentadienyl substituted with an alkyl or alkyl silyl radical, X is a halogen, M is an alkali metal, L is a suitable electron donor ligand, x is 1 or 2, y is 1 or 2, z is 0 or 1, and n is a number corresponding to the value needed to form a stable complex, with the proviso that when y is 2, z and n are 0 is provided. Also disclosed is a polymerization process employing such a catalyst system, and novel olefin polymers. Polymers thus produced exhibit high bulk density and a broad molecular weight distribution.Type: GrantFiled: November 8, 1994Date of Patent: October 17, 1995Assignee: Phillips Petroleum CompanyInventors: Rolf L. Geerts, Elizabeth A. Benham, Max P. McDaniel
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Patent number: 5432236Abstract: According to the present invention, in a vapor phase polymerization of olefins, there is provided an efficient polyolefin manufacturing process capable of preventing the formation of a sheet-like polymer and allowing an olefin polymerization reaction to be started stably.Type: GrantFiled: February 18, 1994Date of Patent: July 11, 1995Assignee: Nippon Oil Company, LimitedInventors: Akira Sano, Kunimichi Kubo, Kazuo Matsuura
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Patent number: 5429757Abstract: An additive composition comprising a graft and derivatized copolymer prepared from ethylene and at least one (C.sub.3 -C.sub.10) alpha-monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes comprising from about 15 to 80 mole percent of ethylene, from about 20 to 85 mole percent of said (C.sub.3 -C.sub.10) alpha-monoolefin and from about 0 to 15 mole percent of said polyene having an average molecular weight ranging from about 5,000 to 500,000, which has been reacted with at least one olefinic carboxylic acid acylating agent to form one or more acylating reaction intermediates characterized by having a carboxylic acid acylating function within their structure and reacting said reaction intermediate with an amino-aromatic compound to form said graft derivatized copolymer, and a lubricating oil composition containing same are provided.Type: GrantFiled: March 18, 1994Date of Patent: July 4, 1995Assignee: Texaco Inc.Inventors: Munmaya K. Mishra, Isaac D. Rubin
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Patent number: 5422400Abstract: The invention relates to a method for producing an ethylenic polymer composition, suitable for molding, at high catalytic efficiency. The ethylenic polymer composition produced has as a high melt tension when melted, and a high melt modulus (die swell ratio). The process comprises a three step polymerization of an olefin employing a transition metal catalyst, the catalyst being produced in a specific manner.Type: GrantFiled: August 3, 1994Date of Patent: June 6, 1995Assignee: Maruzen Polymer Company, Ltd.Inventors: Sakae Kamiyama, Masao Kawahara, Kunihiro Inamatsu, Keizo Kase, Kouji Mizokami, Tsuyoshi Matsumoto
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Patent number: 5418276Abstract: There are disclosed a graft copolymer formed by grafting a styrenic monomer onto a high polymer having double bonds in the side chain to constitute highly syndiotactic polystyrenic chain as the graft component, the graft copolymer having a content of graft component of 0.005 to 99% by weight and a reduced viscosity of 0.01 to 30 dl/g as measured at a concentration of 0.05 g/dl in 1,2,4-trichlorobenzene at 135.degree. C. or a melt index of 0.001 to 500 g/10 minutes as measured at 300.degree. C. under a load of 2.16 kg; a process for efficiently producing the above graft copolymer using a catalyst comprising specific components; and a resin composition comprising the above graft copolymer, a highly syndiotactic styrenic polymer or other thermoplastic resin and, when necessary, an inorganic or organic filler. The above graft copolymer and resin composition are excellent in resistance to heat and chemicals, electrical properties, moldability, compatibility, impact resistance, etc.Type: GrantFiled: July 26, 1994Date of Patent: May 23, 1995Assignee: Idemitsu Kosan Co., Ltd.Inventors: Shuji Machida, Noriyuki Tani
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Patent number: 5405901Abstract: A gas phase process for the production of a 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 cocatalyst in each of two fluidized bed reactors connected in series, under polymerization conditions, with the provisos that:(a) the mixture of ethylene copolymer matrix and active catalyst formed in the first reactor in the series is transferred to the second reactor in the series;(b) other than the active catalyst referred to in proviso (a) and the cocatalyst referred to in proviso (e), no additional catalyst is introduced into the second reactor;(c) in the first reactor in which a low melt index copolymer is made:(1) the alpha-olefin is present in a ratio of about 0.01 to about 0.4 mole of alpha-olefin per mole of ethylene;(2) optionally, hydrogen is present in a ratio of about 0.001 to about 0.Type: GrantFiled: July 6, 1994Date of Patent: April 11, 1995Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Paul T. Daniell, Michael W. Tilston, Thomas E. Spriggs, Burkhard E. Wagner, Arakalgud V. Ramamurthy
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Patent number: 5387649Abstract: Novel metallated polyolefins are produced by contacting a polyolefin having a vinylidene group in the terminal portion with organoalkali metal compound in the presence of alkali metal t-alkoxide or tertiary amine. The metallated polyolefin is used to initiate the polymerization of polymerizable monomers to produce block copolymers of at least two blocks, at least one of which is saturated polyolefin.Type: GrantFiled: June 13, 1994Date of Patent: February 7, 1995Assignee: Shell Oil CompanyInventors: Eric J. M. DeBoer, Fred F. Hage, Adriaan A. Van Der Huizen, Carl L. Willis
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Patent number: 5387749Abstract: Process for the preparation of LLDPE with improved processability by gas phase polymerization performed in two or more reactors, wherein, whatever the order, in one of the reactors a mixture of ethylene and an alpha-olefin CH.sub.2 .dbd.CHR, where R is an alkyl having 1-10 carbon atoms, is polymerized to yield a copolymer containing up to about 20% by mole of the alpha-olefin, and in another reactor a mixture of propylene and an alpha-olefin CH.sub.2 .dbd.CHR', where R' is an alkyl radical having 2-10 carbon atoms, is polymerized to yield a copolymer containing from 5 to 40% by weight of said olefin, in an amount of 5-30% with respect to the total polymer weight and the polymer-catalyst system obtained in the first reactor is fed to the other reactors.Type: GrantFiled: March 5, 1993Date of Patent: February 7, 1995Assignee: Himont IncorporatedInventors: Gabriele Govoni, Massimo Covezzi
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Patent number: 5384371Abstract: The present invention provides a continuous process for producing an adducted derivatized EPM or EPDM oil solution in which a grafted ethylene polymer is adducted with an antioxidant diamine for formation of an adduct during holding.Type: GrantFiled: April 5, 1993Date of Patent: January 24, 1995Assignee: DSM Copolymer, Inc.Inventors: Tony L. Caines, Michael L. Junker
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Patent number: 5382631Abstract: Linear interpolymer blends are disclosed. The blends are made from components having a narrow molecular weight distribution (e.g. Mw/Mn.ltoreq.3) and a narrow composition distribution (e.g. CDBI>50%). The blend components of the blend can all have the same molecular weight but different comonomer contents, the same comonomer content but different molecular weights, or comonomer contents which increase with molecular weight. The blends have either Mw/Mn>3 and/or CDBI<50%, and combinations of each, and can be bimodal with respect to either or both molecular weight and/or comonomer content. The blends are generally free of blend components having both a higher average molecular weight and a lower average comonomer content than another blend component. The blends can have improved mechanical, physical and/or chemical properties. Single or multilayer films having enhanced physical properties are made from the blends.Type: GrantFiled: June 4, 1993Date of Patent: January 17, 1995Assignee: Exxon Chemical Patents Inc.Inventors: Ferdinand C. Stehling, Charles S. Speed, Howard C. Welborn, Jr., deceased
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Patent number: 5382630Abstract: Linear ethylene interpolymer blends are disclosed. The blends are made from components having a narrow molecular weight distribution (e.g. M.sub.w /M.sub.n .ltoreq.3) and a narrow composition distribution (e.g. CDBI>50%). The blend components in a blend can all have the same molecular weight but different comonomer contents, the same comonomer content but different molecular weights, or comonomer contents which increase with molecular weight. The blends have either M.sub.w /M.sub.n >3 or CDBI<50%, or both, and can be multimodal with respect to either or both molecular weight and/or comonomer content. The blends are generally free of blend components having both a higher average molecular weight and a lower average comonomer content than another blend component. The blends can have improved mechanical, physical and/or chemical properties.Type: GrantFiled: February 4, 1993Date of Patent: January 17, 1995Assignee: Exxon Chemical Patents Inc.Inventors: Ferdinand C. Stehling, Charles S. Speed, Curtis H. Welborn, Jr.
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Patent number: 5371145Abstract: A process comprising continuously contacting with a catalyst, under polymerization conditions, ethylene or a mixture comprising ethylene and one or more alpha-olefins in a first fluidized bed reactor and a mixture comprising ethylene and one or more alpha-olefins in a second fluidized bed reactor, the first and second reactors being connected in series, said catalyst comprising:(A) a catalyst precursor comprising:(i) a vanadium compound, which is the reaction product of(a) VX.sub.3 wherein each X is independently chlorine, bromine, or iodine; and(b) an electron donor, which is a liquid, organic Lewis base in which VX.sub.3 is soluble;(ii) a modifier having the formula BX.sub.3 or AlR.sub.(3-a) wherein each X is as defined above; each R is independently alkyl having 1 to 14 carbon atoms; and a is 1 or 2; and(iii) a silica or alumina support for said vanadium compound and modifier;(B) a cocatalyst having the formula AlR.sub.3 wherein R is as defined above; and(C) a promoter having the formula R'.sub.b CX'.sub.Type: GrantFiled: June 8, 1993Date of Patent: December 6, 1994Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Paul T. Daniell, William D. Heitz, Thomas E. Spriggs, Thomas J. McNeil, Kevin J. Cann
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Patent number: 5362814Abstract: There are disclosed a graft copolymer formed by grafting a styrenic monomer onto a high polymer having double bonds in the side chain to constitute highly syndiotactic polystyrenic chain as the graft component, the graft copolymer having a content of graft component of 0.005 to 99% by weight and a reduced viscosity of 0.01 to 30 dl/g as measured at a concentration of 0.05 g/dl in 1,2,4-trichlorobenzene at 135.degree. C. or a melt index of 0.001 to 500 g/10 minutes as measured at 300.degree. C. under a load of 2.16 kg; a process for efficiently producing the above graft copolymer using a catalyst comprising specific components; and a resin composition comprising the above graft copolymer, a highly syndiotactic styrenic polymer or other thermoplastic resin and, when necessary, an inorganic or organic filler. The above graft copolymer and resin composition are excellent in resistance to heat and chemicals, electrical properties, moldability, compatibility, impact resistance, etc.Type: GrantFiled: March 3, 1993Date of Patent: November 8, 1994Assignee: Idemitsu Kosan Co., Ltd.Inventors: Shuji Machida, Noriyuki Tani
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Patent number: 5350807Abstract: A composition is provided, comprising (1) a narrow molecular weight distribution component having an Mw/Mn in the range of about 1.0 to about 2.0 and a weight average molecular weight in the range of about 500 to about 7,500 comprising an ethylene homopolymer; and (2) a broad molecular weight distribution component having an Mw/Mn greater than or equal to about 3.0 and a weight average molecular weight in the range of about 100,000 to about 750,000 comprising and ethylene copolymer; wherein said narrow molecular weight distribution component is present in the polymer composition in an amount of at least about 10 weight percent as based on the total weight of the polymer composition. In another embodiment, the narrow molecular weight distribution component further comprises an ethylene/hexene copolymer.Type: GrantFiled: June 25, 1993Date of Patent: September 27, 1994Assignee: Phillips Petroleum CompanyInventors: Ted M. Pettijohn, Kevin J. Hess
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Patent number: 5346963Abstract: Substantially linear ethylene polymers, e.g., polyethylenes prepared by constrained geometry catalysis (substantially linear ethylene), which are grafted with one or more unsaturated organic compounds containing both ethylenic unsaturation and a carbonyl group, e.g., maleic anhydride, exhibit desirable adhesive properties. These graft-modified substantially linear ethylene polymers also impart desirable compatibility and impact properties to various thermoplastic polymer blends.Type: GrantFiled: April 28, 1993Date of Patent: September 13, 1994Assignee: The Dow Chemical CompanyInventors: Morgan M. Hughes, Kyle G. Kummer, Stephen R. Betso, Michael E. Rowland, Morris S. Edmondson
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Patent number: 5338803Abstract: Modified chlorinated polyethylene (CPE) for use as an impact modifier for polyvinyl chloride, comprising a thermoplastic grafted CPE prepared by polymerizing compatible monomers or comonomers, e.g. methyl methacrylate/styrene, methylmethacrylate or vinyl acetate, onto the CPE backbone via an aqueous slurry suspension polymerization and the process of producing the cited modified chlorinated polyethylene.Type: GrantFiled: April 16, 1992Date of Patent: August 16, 1994Assignee: The Dow Chemical CompanyInventors: Yun C. Sun, David W. Liou
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Patent number: 5336717Abstract: A fluorochemical graft copolymer comprising: a base polymer comprising polymerized units derived from monomers having terminal olefinic double bonds, having a moiety comprising a fluoroaliphatic group grafted thereto. Also disclosed are processes for preparing such fluorochemical graft copolymers, forming and annealing methods for enhancing the surface activity of such a graft copolymer, polymer blends comprising such a fluorochemical graft copolymer and a matrix polymer that is miscible with the base polymer, and a method for reducing the surface energy of a polymer comprising polymerized units derived from monomers having terminal olefinic double bonds.Type: GrantFiled: January 26, 1994Date of Patent: August 9, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventors: Richard J. Rolando, Thomas A. Kotnour, James E. Sax
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Patent number: 5332789Abstract: Polypropylene based resins and compositions comprising the resin having extremely high stiffness, heat resistance and impact strength, with these properties being well-balanced, are provided. The polypropylene based resins are characterized by comprising:(1) a propylene polymer having a content of alpha-olefin other than propylene of not more than 4 mole percent, and the following properties (2), (3) and (4):(2) a pentad fraction (mmmm fraction) measured by .sup.13 C-NMR of not less than 96.0 percent,(3) a main elution fraction peak position of not less than 118.0.degree. C. and a peak half value width of less than 4.0, these values being measured by the temperature raising separation method, and(4) an intrinsic viscosity of not less than 0.5 dl/g, but not more than 5.0 dl/g; and,(5) a rubber content measured by pulse NMR of more than 25 percent.Type: GrantFiled: February 26, 1993Date of Patent: July 26, 1994Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Akira Tanaka, Masaru Nakagawa, Hideo Kusuyama, Sueto Miyazaki, Tatsuya Housaki
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Patent number: RE35308Abstract: A block copolymer of polyalkylene and halogenated polystyrene comprises the formula:S'--A--(A--S').sub.min which m is 0, 1, 3 or 4, A is a saturated polyalkylene, and S' is a nuclear brominated polystyrene having from about 0.5 to about 5 bromines per styrene unit. The polystyrene blocks are substantially free of halogen other than bromine and chlorine, and the polyalkylene is substantially free of halogen. The compositions retain the elastomeric properties of the non-halogenated form of the compounds while having significantly reduced flammability.Type: GrantFiled: March 13, 1995Date of Patent: July 30, 1996Assignee: Shell Oil CompanyInventors: Nicolai A. Favstritsky, Rastko I. Mamuzic