Patents Examined by Mark Nagumo
  • Patent number: 6180732
    Abstract: Isospecific and/or syndiospecific catalysts and processes for the propagation of an isotactic and/or syndiotactic polymer chain derived from an ethylenically unsaturated monomer which contains 3 or more carbon atoms or is a substituted vinyl compound. The catalysts comprise a stereorigid, stereodirected and stereolocked metallocene and/or metallocene cation catalysts, characterized by having &bgr; stereodirecting substituents and &agr; stereolocking substituents such that the catalysts have overall either Cs or C2 (or pseudo-Cs or C2) symmetry and such that the substituents define the orientation of the growing polymer chain end and resulting in tactioselectivity of successive monomer additions. Methods are also described for the preparation and use of these unique catalysts.
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: January 30, 2001
    Inventor: John A. Ewen
  • Patent number: 5969070
    Abstract: Novel elastomeric alpha olefin polymers of homogeneous composition formed from linear or branched chain C.sub.3 -C.sub.10 monomers such as propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene and mixtures thereof, comprising alternating isotactic and atactic disastereosequences in which all polymer fractions have similar molecular weight distributions, M.sub.W /M.sub.n, of less than 7, an isotactic Block Index greater than about 5, an isotactic pentad, mmmm, content of between 9 and 71%, an average molecular weight, Mw, from about 20,000 to about 1,350,000, a melting point of above 70.degree. C., and which polymers are elastomeric in exhibiting a positive power of recovery of elongation above 100%. Examples include thermoplastic elastomeric polypropylenes having melting points between 70-165.degree. C., which are highly regioregular and have low tensile set of below about 70.degree. at 300% elongation.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: October 19, 1999
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Robert M. Waymouth, Elisabeth Hauptman, Geoffrey W. Coates
  • Patent number: 5955555
    Abstract: Ethylene may be polymerized by contacting it with certain iron or cobalt complexes of selected 2,6-pyridinecarboxaldehydebis(imines) and 2,6-diacylpyridinebis(imines). The polymers produced are useful as molding resins. Novel 2,6-pyridinecarboxaldehydebis(imines) and 2,6-diacylpyridinebis(imines), and novel complexes of 2,6-pyridinecarboxaldehydebis(imines) and 2,6-diacylpyridinebis(imines) with iron and cobalt are also disclosed.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: September 21, 1999
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Alison Margaret Anne Bennett
  • Patent number: 5939504
    Abstract: Compositions and methods for catalyzing and controlling the rate of olefin metathesis reactions including Ring Opening Metathesis Polymerization (ROMP) reactions. The molding of polymer articles using ROMP polymers. The composition includes a Ruthenium or Osmium carbene complex catalyst and a gel modification additive. The Ruthenium or Osmium carbene complex catalyst having the formula ##STR1## where M may be Os or Ru; R and R.sup.1 may be the same or different and may be hydrogen or a substituent group including C.sub.2 -C.sub.20 alkenyl, C.sub.2 -C.sub.20 alkynyl, C.sub.1 -C.sub.20 alkyl, aryl, C.sub.1 -C.sub.20 carboxylate, C.sub.1 -C.sub.20 alkoxy, C.sub.2 -C.sub.20 alkenyloxy, C.sub.2 -C.sub.20 alkynyloxy, aryloxy, C.sub.2 -C.sub.20 alkoxycarbonyl, C.sub.1 -C.sub.20 alkylthio, C.sub.1 -C.sub.20 alkylsulfonyl and C.sub.1 -C.sub.20 alkylsulfinyl; X and X.sup.1 may be the same or different and may be any anionic ligand; and L and L.sup.1 may be the same or different and may be neutral electron donor.
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: August 17, 1999
    Assignee: Advanced Polymer Technologies
    Inventors: Charles S. Woodson, Jr., Robert H. Grubbs
  • Patent number: 5932669
    Abstract: A very effective catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are halogen or alkyl, R.sup.3 is alkyl, R.sup.4 to R.sup.10 are alkyl or hydrogen and R.sup.11 is a (substituted) alkylene or heteroatom bridge.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: August 3, 1999
    Assignee: Targor GmbH
    Inventors: Jurgen Rohrmann, Volker Dolle, Andreas Winter, Frank Kuber
  • Patent number: 5922813
    Abstract: Catalyst systems comprising, on the one hand, a catalytic solid based on complexed titanium trichloride and, on the other hand, a nonhalogenated organoaluminium activator. When employed in gas phase olefin polymerisation processes, these catalyst systems make it possible to manufacture a wide range of homopolymers and copolymers (random and block) with an isotacticity index which can be adjusted to very low values and with excellent pourability, even in the case of copolymers of high comonomer content. In the absence of transfer agents they also make it possible to synthesize polymers of very high molecular masses, with an increased activity. These polymerization processes yield particularly advantageous results in the case of propylene.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 13, 1999
    Assignee: Solvay Polyolefins Europe-Belgium
    Inventors: Jean-Louis Costa, Sabine Pamart, Gaetane Hallot
  • Patent number: 5922863
    Abstract: Disclosed are ruthenium and osmium carbene compounds which are stable in the presence of a variety of functional groups and which can be used to catalyze olefin metathesis reactions on unstrained cyclic and acyclic olefins. Specifically, the present invention relates to carbene compounds of the formula ##STR1## wherein: M is Os or Ru; R and R.sup.1 are independently selected from hydrogen and functional groups C.sub.2 -C.sub.20 alkenyl, C.sub.2 -C.sub.20 alkynyl, C.sub.1 -C.sub.20 alkyl, aryl, C.sub.1 -C.sub.20 carboxylate, C.sub.2 -C.sub.20 alkoxy, C.sub.2 -C.sub.20 alkenyloxy, C.sub.2 -C.sub.20 alkynyloxy, aryloxy, C.sub.2 -C.sub.20 alkoxycarbonyl, C.sub.1 -C.sub.20 alkylthio, C.sub.1 -C.sub.20 alkylsulfonyl or C.sub.1 -C.sub.20 alkylsulfinyl; each optionally substituted with C.sub.1 -C.sub.5 alkyl, a halogen, C.sub.1 -C.sub.5 alkoxy or with a phenyl group optionally substituted with a halogen, C.sub.1 -C.sub.5 alkyl or C.sub.1 -C.sub.5 alkoxy; X and X.sup.
    Type: Grant
    Filed: October 26, 1995
    Date of Patent: July 13, 1999
    Assignee: California Institute of Technology
    Inventors: Robert H. Grubbs, SonBinh T. Nguyen, Gregory C. Fu
  • Patent number: 5916989
    Abstract: 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 microstructure, which gives 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: Grant
    Filed: July 10, 1997
    Date of Patent: June 29, 1999
    Assignees: E. I. du Pont de Nemours and Company, University of North Carolina at Chapel Hill
    Inventors: Maurice S. Brookhart, III, Lynda Kaye Johnson, Christopher Moore Killian, Elizabeth Forrester McCord, Stephan James McLain
  • Patent number: 5914376
    Abstract: Catalyst for the polymerization of olefins, process for the preparation thereof, and the use thereof.The present invention relates to a heterogeneous catalyst for the polymerization of olefins, comprising the product of the reaction of an aluminoxane which is insoluble in aliphatic and aromatic hydrocarbons, with at least one metallocene.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 22, 1999
    Assignee: Targor GmbH
    Inventors: Hans-Friedrich Herrmann, Bernd Bachmann, Volker Dolle, Walter Spaleck
  • Patent number: 5908904
    Abstract: Catalysts consisting ofA) an alcoholate of the rare earths, a carboxylate of the rare earths, a complex compound of the rare earths with diketones and/or an addition compound of the halides of the rare earths with an oxygen or nitrogen donor compound,B) an aluminium trialkyl, a dialkyl aluminium hydride and/or an alumoxane,C) another Lewis acid andD) an inert, particulate inorganic solid with a specific surface of greater than 10 m.sup.2 /g (BET) and a pore volume of 0.3 to 15 ml/gare eminently suitable for the polymerization of conjugated dienes, more particularly butadiene, in the gas phase.
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: June 1, 1999
    Assignee: Bayer AG
    Inventors: Gerd Sylvester, Hugo Vernaleken
  • Patent number: 5902764
    Abstract: Catalyst systems comprising, on the one hand, a catalytic solid based on complexed titanium trichloride and, on the other hand, a nonhalogenated organolauminium activator.When employed in gas phase olefin polymerization processes, these catalyst systems make it possible to manufacture a wide range of homopolymers and copolymers (random and block) with an isotacticity index which can be adjusted to very low values and with excellent pourability, even in the case of copolymers of high comonomer content.In the absence of transfer agents they also make it possible to synthesise polymers of very high molecular masses, with an increased activity.These polymerization processes yield particularly advantageous results in the case of propylene.
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: May 11, 1999
    Assignee: Solvay Polyolefins Europe - Belgium (Societe Anonyme)
    Inventors: Jean-Louis Costa, Sabine Pamart
  • Patent number: 5891963
    Abstract: 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: Grant
    Filed: July 10, 1997
    Date of Patent: April 6, 1999
    Assignees: E. I. du Pont de Nemours and Company, University of North Carolina
    Inventors: Maurice S. Brookhart, Lynda Kaye Johnson, Christopher Moore Killian, Samuel David Arthur, Elizabeth Forrester McCord, Stephan James McLain
  • Patent number: 5886224
    Abstract: 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 microstructure, which gives 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: Grant
    Filed: July 10, 1997
    Date of Patent: March 23, 1999
    Assignees: E. I. du Pont de Nemours and Company, University of North Carolina
    Inventors: Maurice S. Brookhart, Lynda Kaye Johnson, Samuel David Arthur, Jerald Feldman, Kristina Ann Kreutzer, Alison Margaret Anne Bennett, Edward Bryan Coughlin, Steven Dale Ittel, Anju Parthasarathy, Daniel Joseph Tempel
  • Patent number: 5880323
    Abstract: 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 microstructure, which gives 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: Grant
    Filed: July 10, 1997
    Date of Patent: March 9, 1999
    Assignees: E. I. du Pont de Nemours and Company, University of North Carolina
    Inventors: Maurice S. Brookhart, III, Lynda Kaye Johnson, Christopher Moore Killian, Lin Wang, Zhen-Yu Yang
  • Patent number: 5880241
    Abstract: 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 microstructure, which gives 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: Grant
    Filed: January 24, 1996
    Date of Patent: March 9, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Maurice S. Brookhart, Lynda Kaye Johnson, Christopher Moore Killian, Elizabeth Forrester McCord, Stephan James McLain, Kristina Ann Kreutzer, Steven Dale Ittel, Daniel Joseph Tempel
  • Patent number: 5866663
    Abstract: 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 microstructure, which gives 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: Grant
    Filed: July 10, 1997
    Date of Patent: February 2, 1999
    Assignees: E. I. du Pont de Nemours and Company, University of North Carolina
    Inventors: Maurice S. Brookhart, Lynda Kaye Johnson, Christopher Moore Killian, Samuel David Arthur, Jerald Feldman, Elizabeth Forrester McCord, Stephan James McLain, Kristina Ann Kreutzer, Alison Margaret Anne Bennett, Edward Bryan Coughlin, Steven Dale Ittel, Anju Parthasarathy, Lin Wang, Zhen-Yu Yang
  • Patent number: 5866661
    Abstract: A process to control the heat transfer coefficient in slurry olefin polymerization processes comprising shocking the polymerization reactor is provided. This shock comprises quickly decreasing and then restoring to normal operating conditions, the higher alpha-olefin comonomer to ethylene monomer weight feed ratio.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: February 2, 1999
    Assignee: Phillips Petroleum Company
    Inventors: Elizabeth A. Benham, Max P. McDaniel, John D. Stewart, Lonnie J. Dodson, Charles R. Nease
  • Patent number: 5859139
    Abstract: Polymers and copolymers of propylene are modified by grafting with polyalkenylenes having a trans double bond content of higher than 30%. The preparation is carried out via thermic treatment of the propylene (co)polymer with said polyalkenylene at a temperature comprised between 200.degree. and 350.degree. C. an the presence of a free radical initiator other than peroxide.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: January 12, 1999
    Assignee: Montell Technology Company BV
    Inventors: Antonio Addeo, Corrado Brichta, Francesco Mascia, Arturo Marchioni
  • Patent number: 5856387
    Abstract: A pressure sensitive adhesive of a mutually immiscible first elastomer (styrene-butadiene block copolymer) exhibiting a first glass transition temperature and a second elastomer (e.g., a styrene-isoprene-styrene block copolymer) exhibiting a second glass transition temperature greater than the first is tackified by a tackifying system comprising tackifier preferentially miscible with the second elastomer to provide a dynamic mechanical spectrum plot of tangent delta versus temperature in .degree.C. showing two separate and distinct glass transition temperature peaks. The mixture exhibits excellent processability and ambient and low temperature adhesive properties.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: January 5, 1999
    Assignee: Avery Dennison Corporation
    Inventors: Yukihiko Sasaki, Jesse Ercillo
  • Patent number: 5854362
    Abstract: Metal complexes corresponding to the formula: ##STR1## wherein: L independently each occurrence is a delocalized, .pi.-bonded group that is bound to M, containing up to 50 nonhydrogen atoms;M is a metal of Group 3, 4 or the Lanthanide series of the Periodic Table of the Elements;Z is a covalently bound, divalent substituent of up to 50 non-hydrogen atoms having the formula, --(ER.sub.2).sub.m --, wherein E independently each occurrence is carbon, silicon or germanium, R independently each occurrence is selected from the group consisting of C.sub.1-20 hydrocarbyl, and C.sub.1-20 hydrocarbyloxy, with the proviso that in at least one occurrence R is C.sub.
    Type: Grant
    Filed: December 11, 1995
    Date of Patent: December 29, 1998
    Assignee: The Dow Chemical Company
    Inventors: Peter N. Nickias, Lee Spencer