Patents Examined by Edward J. Smith
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Patent number: 5731254Abstract: A syndiotactic polyolefin is obtained in a high yield by polymerization or copolymerization of an olefin of the formula R.sup.a --CH.dbd.CH--R.sup.b in the presence of a catalyst consisting of a metallocene of the formula I ##STR1## in which M.sup.1 is titanium, zirconium, vanadium, niobium or tantalum, and an aluminoxane. This polyolefin has a very high molecular weight, a very narrow molecular weight distribution and a very high syndiotactic index. Shaped articles produced from the polymer are distinguished by a high transparency, flexibility, tear resistance and an excellent surface gloss.Type: GrantFiled: June 5, 1995Date of Patent: March 24, 1998Assignee: HoechstInventors: Andreas Winter, Jurgen Rohrmann, Martin Antberg, Volker Dolle, Walter Spaleck
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Patent number: 5731393Abstract: An ethylene polymer having small values of Mw/Mn and Mz/Mw, a small proportion of long-chain branches and a high swell ratio and a process for preparing the polymer are disclosed. A solid titanium catalyst component obtained by initially contacting a solid titanium composite containing titanium, magnesium, halogen and a compound having at least two ether linkages present through plural atoms with an organometallic compound and then contacting the resulting product with oxygen is further disclosed. An ethylene polymerization catalyst comprising the above catalyst component and an organometallic compound catalyst component is furthermore disclosed. The ethylene polymer is excellent in moldability, and from this polymer, a molded article which is excellent in rigidity and impact resistance and free from poor appearance can be obtained. By the use of the ethylene polymerization catalyst, an ethylene polymer having excellent properties as mentioned above can be obtained.Type: GrantFiled: April 9, 1997Date of Patent: March 24, 1998Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Shin-ichi Kojoh, Mamoru Kioka
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Patent number: 5726261Abstract: The present invention relates to spherical solid components of catalysts for the polymerization of olefins comprising, supported on a magnesium dihalide in active form, a titanium compound containing at least one Ti-halogen bond and one OR group, said OR group being bonded to Ti in an amount such that the OR/Ti molar ratio is greater than or equal to 0.5; optionally the component also comprises an electron donor compound. The spherical solid components of the invention are characterized by having a porosity comprised between 0.35 and 0.7 cm.sup.3 /g and by a pore size distribution such that at least 50% of the porosity is due to pores having an average radius greater than 800 .ANG..Type: GrantFiled: September 11, 1996Date of Patent: March 10, 1998Assignee: Montell Technology Company bv.Inventors: Mario Sacchetti, Gianni Pennini, Illaro Cuffiani
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Patent number: 5714554Abstract: Amorphous propylene/1-butene and ethylene/propylene copolymers having increased tensile properties produced by the process comprising:reacting propylene and 1-butene monomers or ethylene and propylene monomers in the presence of a catalyst system comprising:(a) a solid supported catalyst component is prepared by the method comprising: (i) co-comminuting magnesium halide support base and aluminum trihalide in a molar ratio from about 8:0.5 to about 8:3 in the absence of added electron donor; and (ii) then co-comminuting the product of step (i) in the absence of added electron donor with sufficient titanium tetrahalide to provide a molar ratio of magnesium halide to titanium tetrahalide from about 8:0.1 to about 8:1.0;(b) a trialkylaluminum co-catalyst, having from 1 to 9 carbon atoms in each alkyl group in an amount such that the Al/Ti ratio is between about 50:1 and about 500:1; and(c) an alkoxy silane component of the formula R.sub.n Si(OR').sub.4-n where n=1-3, R=aryl or alkyl and R'=C.sub.1-3 alkyl.Type: GrantFiled: June 7, 1995Date of Patent: February 3, 1998Assignee: Rexene CorporationInventors: Andres Sustic, George C. Allen
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Patent number: 5703181Abstract: Disclosed are a catalyst for olefin polymerization comprising (A) a compound of a transition metal in Group IVB of the periodic table which contains a ligand having a cyclopentadienyl skeleton, (B) an organoaluminum compound and any one of (C1) a Br.o slashed.nsted acid; (C2) a material obtained by contacting (c-1) a magnesium compound with (c-2) an electron donor; and (C3) a material obtained by contacting (c-1) a magnesium compound, (c-2) an electron donor and (c-3) an organometallic compound with each other. Also disclosed are processes for polymerizing an olefin in the presence of the above-mentioned catalysts for olefin polymerization. Such catalysts and processes for olefin polymerization as described above are excellent in olefin polymerization activity and economical efficiency.Type: GrantFiled: January 16, 1996Date of Patent: December 30, 1997Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Takashi Tashiro, Takashi Ueda
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Patent number: 5700749Abstract: This invention relates to a process for polymerizing olefins using a catalyst composed of a transition metal catalyst component, an aluminoxane component and an organoaluminum component. In the process of this invention, the catalyst exhibits excellent polymerization activity with the use of a small amount of the aluminoxane xane. The polymerization process gives olefin polymers having a narrow molecular weight distribution and by the copolymerization of two or more olefins, gives olefin copolymers having a narrow molecular weight distribution and a narrow composition distribution.Type: GrantFiled: March 1, 1995Date of Patent: December 23, 1997Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Toshiyuki Tsutsui, Akinori Toyota, Norio Kashiwa
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Patent number: 5700750Abstract: A process for producing an alpha-olefin polymer, which comprises polymerizing an alpha-olefin in the presence of a catalyst formed from (A) a transition metal compound comprising (A-1) a transition metal atom, (A-2) a hetero atom-containing ligand containing a heteroatom selected from oxygen, sulfur, nitrogen and phosphorus capable of forming a bond with the transition metal atom, and (A-3) a ligand having a conjugated .pi. electron through which the ligand can be bonded to the transition metal atom (A-1), and (B) an aluminoxane. The transition metal compound may be pre-treated with (C) an organometallic compound, or (D) a halogen-containing inorganic compound of an element of Group III, IV or V of the periodic table.Type: GrantFiled: May 24, 1995Date of Patent: December 23, 1997Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Toshiyuki Tsutsui, Akinori Toyota, Norio Kashiwa
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Patent number: 5698643Abstract: There is disclosed a process for the regulation of the molecular weight of a high-cis 1,4-polybutadiene prepared by polymerizing 1,3-butadiene in a solution of an aliphatic and/or cycloaliphatic or aromatic solvent system employing as a catalyst system a mixture of (1) an organonickel compound, (2) an organoaluminum compound, and (3) a fluorine containing compound selected from the group consisting of hydrogen fluoride and hydrogen fluoride complexes which are prepared by complexing hydrogen fluoride with a ketone, an aldehyde, a nitrile, a mineral acid containing oxygen, an ester, an ether, an alcohol, a phenol or water; said polymerization being conducted in the presence of small amounts of olefins selected from the group consisting of 1-butene, isobutylene, cis and trans-2-butene and allene.Type: GrantFiled: May 11, 1995Date of Patent: December 16, 1997Assignee: The Goodyear Tire & Rubber CompanyInventors: Ken Weikart Donbar, William Mose Saltman, Morford Church Throckmorton
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Patent number: 5698635Abstract: A reactive and processable fluoropolymer, obtainable by mechanical shearing ofa fluoropolymer A) comprising polymerized monomer units of at least one fluorinated, optionally substituted, alkene with 2 to 8 carbon atoms andoptionally at least one member selected from the group consisting of a perfluorinated vinyl ether, non-fluorinated olefin and non-fluorinated vinyl ester, and0.3 to 7% of a compound B) which possessesa double bond (I) capable of adding to polymeric radical fragments anda II-electron system which is either conjugated with double bond (I) or has readily transferrable hydrogen atoms in the allyl or benzyl position andoptionally further double bonds or reactive groups andoptionally further auxiliary agents (C).The fluoropolymer is especially useful in radical addition or nucleophilic or electrophilic substitution or addition, e.g. cross-linking or grafting.Type: GrantFiled: November 2, 1995Date of Patent: December 16, 1997Assignee: Bayer AktiengesellschaftInventors: Ralf Kruger, David Harrison, Dieter Wrobel
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Patent number: 5698487Abstract: The present invention relates to components of catalysts for the polymerization of olefins comprising a metallocene compound and a magnesium halide which have particular values of porosity and surface area. In particular the components of the invention have surface area (BET) greater than about 50 m.sup.2 /g, porosity (BET) greater than about 0.15 cm.sup.3 /g and porosity (Hg) greater than 0.3 cm.sup.3 /g, with the proviso that when the surface area is less than about 150 m.sup.2 /g, the porosity (Hg) is less than about 1.5 cm.sup.3 /g. The components of the invention are particularly suitable for the preparation of catalysts for the gas-phase polymerization of .alpha.-olefins.Type: GrantFiled: May 25, 1995Date of Patent: December 16, 1997Assignee: Montell Technology Company BVInventors: Mario Sacchetti, Stefano Pasquali, Gabriele Govoni
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Patent number: 5693729Abstract: A catalyst for producing a polyolefin having a high melting point and a high stereoregularity, which comprises: (A) a solid catalyst component containing titanium, magnesium and halogen, (B) an organic aluminum compound, and (C) an organic silicon compound represented by Formula (1); ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each represents a C.sub.1-3 hydrocarbon group.Type: GrantFiled: January 4, 1995Date of Patent: December 2, 1997Assignee: Showa Denko K.K.Inventors: Masaki Fushimi, Toshio Fujita
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Patent number: 5688734Abstract: The invention relates to a supported, prepolymerized metallocene catalyst system as well as its production and use in olefin polymerization. The method for producing the prepolymerized catalyst system involves prepolymerizing a metallocene catalyst system containing a volume of solution that is the equivalent of or less than the total pore volume of the supported catalyst system.Type: GrantFiled: September 19, 1996Date of Patent: November 18, 1997Assignees: Exxon Chemical Patents Inc., Hoechst AktiengesellschaftInventors: Anthony Nicholas Speca, Kelly Tormaschy
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Patent number: 5686542Abstract: Branched low-pressure polyethylenes are prepared by oligomerization of ethylene on a nickel-containing catalyst and polymerization of the oligomers obtained, if appropriate in the presence of ethylene, on a chromium-containing catalyst.Type: GrantFiled: September 5, 1996Date of Patent: November 11, 1997Assignee: Bayer AktiengesellschaftInventors: Karl-Heinz Aleksander Ostoja-Starzewski, Josef Witte, Herbert Bartl, Karl-Heinz Reichert, Georgios Vasiliou
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Patent number: 5681913Abstract: Amorphous propylene/1-butene and ethylene/propylene copolymers having increased tensile properties produced by the process comprising:reacting propylene and 1-butene monomers or ethylene and propylene monomers in the presence of a catalyst system comprising:(a) a solid supported catalyst component is prepared by the method comprising: (i) co-comminuting magnesium halide support base and aluminum trihalide in a molar ratio from about 8:0.5 to about 8:3 in the absence of added electron donor; and (ii) then co-comminuting the product of step (i) in the absence of added electron donor with sufficient titanium tetrahalide to provide a molar ratio of magnesium halide to titanium tetrahalide from about 8:0.1 to about 8:1.0;(b) a trialkylaluminum co-catalyst, having from 1 to 9 carbon atoms in each alkyl group in an amount such that the Al/Ti ratio is between about 50:1 and about 500:1; and(c) an alkoxy silane component of the formula R.sub.n Si(OR').sub.4-n where n=1-3, R=aryl or alkyl and R'=C.sub.1-3 alkyl.Type: GrantFiled: June 7, 1995Date of Patent: October 28, 1997Assignee: Rexene CorporationInventors: Andres Sustic, George C. Allen
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Patent number: 5661096Abstract: In the case of Ziegler catalysts based on a metallocene as the transition metal component and an aluminoxane as the activator, preactivation of the metallocene with the aluminoxane results in a considerable increase in the activity of the catalyst system. Furthermore, 1-olefin polymers of a high degree of isotacticity and having compact, spherical particles, a very narrow particle size distribution and a high bulk density are obtained by means of a catalyst system of this type.Type: GrantFiled: June 7, 1995Date of Patent: August 26, 1997Assignee: Hoechst AGInventors: Andreas Winter, Walter Spaleck
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Patent number: 5652303Abstract: A catalyst for polymerization of an olefin, said catalyst being formed from[A] a solid titanium catalyst component comprising magnesium, titanium, halogen and an electron donor as essential ingredients,[B] an organoaluminum compound catalyst component, and[C] an electron donor catalyst component comprising at least two electron donors including an electron donor (1) and an electron donor (2), the MFR (a) of homopolypropylene obtained by using the electron donor (1) together with the solid titanium catalyst component [A] and the organoaluminum compound catalyst component [B] has the following relation to the MFR (b) of homopolypropylene obtained by using the electron donor (2) under the same polymerization conditions as in the case of using the electron donor (1)log [MFR (b)/MFR (a)].gtoreq.1.5.This catalyst can give an olefin polymer having a broad molecular weight. Also provided is a process for polymerizing or copolymerizing an olefin in the presence of the above catalyst.Type: GrantFiled: December 6, 1995Date of Patent: July 29, 1997Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Naoshi Ishimaru, Mamoru Kioka, Akinori Toyota
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Patent number: 5641843Abstract: A process for producing an alpha-olefin polymer, which comprises polymerizing an alpha-olefin in the presence of a catalyst formed from(A) a solid catalyst component comprising an inorganic carrier and deposited thereon a compound of a transition metal of Group IVB of the periodic table treated with an organometallic compound, and(B) an aluminoxane.Type: GrantFiled: November 17, 1995Date of Patent: June 24, 1997Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Toshiyuki Tsutsui, Akinori Toyota, Norio Kashiwa
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Patent number: 5637665Abstract: Amorphous propylene/1-butene and ethylene/propylene copolymers having increased tensile properties produced by the process comprising:reacting propylene and 1-butene monomers or ethylene and propylene monomers in the presence of a catalyst system comprising:(a) a solid supported catalyst component is prepared by the method comprising: (i) co-comminuting magnesium halide support base and alumminum trihalide in a molar ratio from about 8:0.5 to about 8:3 in the absence of added electron donor; and (ii) then co-comminuting the product of step (i) in the absence of added electron donor with sufficient titanium tetrahalide to provide a molar ratio of magnesium halide to titanium tetrahalide from about 8:0.1 to about 8:1.0;(b) a trialkylaluminum co-catalyst, having from 1 to 9 carbon atoms in each alkyl group in an amount such that the Al/Ti ratio is between about 50:1 and about 500:1; and(c) an alkoxy silane component of the formula R.sub.n Si(OR').sub.4-n where n=1-3, R=aryl or alkyl and R'=C.sub.1-3 alkyl.Type: GrantFiled: June 7, 1995Date of Patent: June 10, 1997Assignee: Rexene CorporationInventors: Andres Sustic, George C. Allen
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Patent number: 5627246Abstract: A supported catalyst system that is obtained bya) reacting a finely divided carrier with an a-trisalkoxy-silyl-.omega.-haloalkyl compound,b) adding a metallocene complex of the indicated formula I to the reaction product of a);c) reacting the product of b) with a quaternizing agent; andd) optionally adding an open-chain or cyclic alumoxane compound.The catalyst system can be used to prepare polymers of C.sub.2 -C.sub.10 -alk-1-enes.Type: GrantFiled: March 1, 1995Date of Patent: May 6, 1997Assignee: BASF AktiengesellschaftInventors: Franz Langhauser, David Fischer, J urgen Kerth, G unther Schweier, Elke Barsties, Hans-Herbert Brintzinger, Stefan Schaible, Werner Roell
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Patent number: RE35717Abstract: A cycloolefin copolymerization method, feed composition and product made from the feed which includes: a nonpolar cycloolefin, a polar cycloolefin and a catalyst. Preferably, the nonpolar cycloolefin is dicyclopentadiene, the catalyst comprises WCl.sub.6, the polar cycloolefin is an ester, and the composition also includes an activator.Type: GrantFiled: September 17, 1993Date of Patent: January 20, 1998Assignee: Metton America, Inc.Inventor: Steven H. Nahm