Abstract: Concentrates for lubricating oil compositions are prepared by mixing at elevated temperature: (i) at least one high molecular weight ashless dispersant; (ii) at least one oil-soluble overbased metal detergent; and (iii) at least one surface-active agent comprising a low molecular weight hydroxyl or amine group.
Type:
Grant
Filed:
April 9, 1999
Date of Patent:
October 30, 2001
Assignee:
Exxon Chemicals Patents INC
Inventors:
Gary Higton, Jacob Emert, Robert A. Wilkinson, Isabel P. MacDonald, Karl J. Van Driesen, Salvatore Rea, James P. Stokes, Andrew J. D. Ritchie
Abstract: Compositions comprising an ethylene/vinyl acetate or propionate/vinyl branched carboxylate terpolymer improve the low temperature properties of fuel oils.
Type:
Grant
Filed:
July 14, 1997
Date of Patent:
October 23, 2001
Assignee:
Exxon Chemical Patents Inc
Inventors:
Brian William Davies, Ramah Jessica Brod, Jan Bock, Tuncel Ibrahim
Abstract: The combination of a molybdenum compound and an aromatic amine has been found to produce a synergistic antioxidant effect when used as an antioxidant additive for lubricating oils. The combination has been found to be particularly effective under catalytic oxidation conditions, e.g. Fe catalysed oxidation of crankcase lubricating oils.
Abstract: Copolymers, and processes to make them, are provided which are derived from monomers comprising:
a) one mono-olefin having a single Ziegler-Natta polymerizable bond;
b) a second monomer having at least one Ziegler-Natta polymerizable bond;
c) a third monomer having at least two Ziegler-Natta polymerizable bonds such monomer being:
i) straight-chained and of less than six or at least seven carbon atoms;
ii) other than straight chained; or
iii) combinations thereof,
such copolymer having:
c) at least about one carbon-carbon unsaturated bond per number average molecule;
d) viscous energy of activation (Ea) at least 1 kcal/mol greater than a copolymer having a linear backbone derived from same monomers, but excluding species having at least two Ziegler-Natta polymerizable bonds;
e) crystallinity level of about 10% to about 50%; and
f) Mz/Mw at least about 1.7.
Such copolymers show enhanced melt processability and other attributes during end-product fabrication.
Type:
Grant
Filed:
October 24, 1994
Date of Patent:
October 9, 2001
Assignee:
Exxon Chemical Patents Inc.
Inventors:
Aspy Keki Mehta, Charles Stan Speed, Jo Ann Marie Canich, Norbert Baron, Bernard Jean Folie, Makoto Sugawara, Akihira Watanabe, Howard Curtis Welborn, Jr.
Abstract: Random propylene thermoplastic copolymers can be used to increase the elongation to break and toughness of thermoplastic vulcanizates. Semi-crystalline polypropylene is a preferred thermoplastic phase. The rubber can be olefinic rubbers. Random thermoplastic polypropylene copolymers are different from conventional Ziegler-Natta propylene copolymers as the compositional heterogeneity of the copolymer is greater with Ziegler-Natta copolymers. This difference results in substantial differences in properties (elongation to break and toughness) between thermoplastic vulcanizates modified with random thermoplastic propylene copolymers and those modified with conventional Ziegler-Natta propylene copolymers. An increase in elongation to break results in greater extensibility in the articles made from a thermoplastic vulcanizate.
Type:
Grant
Filed:
July 1, 1998
Date of Patent:
September 11, 2001
Assignees:
Advanced Elastomer Systems, L.P., Exxon Chemical Patents, Inc.
Inventors:
Terry Finerman, Maria D. Ellul, Sabet Abdou-Sabet, Sudhin Datta, Avi Gadkari
Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator.
Type:
Application
Filed:
March 14, 2001
Publication date:
September 6, 2001
Applicant:
Exxon Chemical Patents, Inc.
Inventors:
Moses Olukayode Jejelowo, Sun-Chueh Kao
Abstract: The present invention relates to an improved catalyst delivery method for introducing a supported bulky ligand metallocene-type catalyst system to a reactor for polymerizing one or more olefin(s). In particular, the invention provides for a method of introducing a supported metallocene-type catalyst system into a polymerization reactor by and in the presence of a carrier solution of an antistatic agent and a liquid diluent. Also, the invention is directed toward a catalyst feeder for use in a polymerization process.
Abstract: The invention concerns fluids that have a low reactivity with respect to ozone formation, blends thereof, and the replacement of conventional industrial solvents with said fluid or fluid blends in order to reduce troposheric ozone formation.
Type:
Grant
Filed:
April 7, 1999
Date of Patent:
August 28, 2001
Assignee:
Exxon Chemical Patents Inc.
Inventors:
Albert Ilya Yezrielev, Richard Henry Schlosberg, George Andrew Knudsen, Thomas Marshall Larson
Abstract: An additive composition comprising:
(a) an ashless dispersant comprising an acylated nitrogen compound; and
(b) a carboxylic acid, or an ester of the carboxylic acid and an alcohol wherein the acid has from 2 to 50 carbon atoms and the alcohol has one or more carbon atoms
provides an improvement in the lubricity of fuel oils and exhibits improved solubility in the fuel oil.
Abstract: A process/apparatus is disclosed for continuously separating a liquid medium comprising diluent and unreacted monomers from a polymerization effluent comprising diluent, unreacted monomers and polymer solids, comprising a continuous discharge of the polymerization effluent from a slurry reactor through a discharge valve and transfer conduit into a first intermediate pressure flash tank with a conical bottom defined by substantially straight sides inclined at an angle to that of horizontal equal to or greater than the angle of slide of the slurry/polymer solids and an exit seal chamber of such diameter (d) and length (l) as to maintain a desired volume of concentrated polymer solids/slurry in the exit seal chamber such as to form a pressure seal while continuously discharging a plug flow of concentrated polymer solids/slurry bottom product of said first flash tank from the exit seal chamber through a seal chamber exit reducer with inclined sides defined by substantially straight sides inclined at an angle to t
Abstract: An improved process for preparing alcohols by the Oxo process. More particularly this invention relates to an improvement in the hydrogenation step of the Oxo process characterized in the use of certain bulk multimetallic hydrogenation catalysts comprised of at least one Group VIII non-noble metal and at least two Group VIB metals.
Type:
Grant
Filed:
January 14, 2000
Date of Patent:
August 21, 2001
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
Jose Manuel Vargas, Kenneth Lloyd Riley
Abstract: The invention provides a copolymer of an isomonoolefin having from 4 to 7 carbon atoms and containing a copolymerized alkenyl styrene moiety represented by the formula I:
where m=0-2, n=0-20, each of R1 through R7 are independently selected from the group consisting of hydrogen, C1 to C10 alkyl and C1 to C10 primary or secondary alkyl halides, and at least one of R1, R2 or R3 is hydrogen, and when m=1 or 2, R3 and R1 are —CH2—.
Type:
Grant
Filed:
October 7, 1998
Date of Patent:
August 14, 2001
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
Timothy Daniel Shaffer, David Yen-Lung Chung
Abstract: The present invention relates to an improved catalyst delivery method for introducing a supported bulky ligand metallocene-type catalyst system to a reactor for polymerizing one or more olefin(s). In particular, the invention provides for a method of introducing a supported metallocene-type catalyst system into a polymerization reactor by and in the presence of a carrier solution of an antistatic agent and a liquid diluent. Also, the invention is directed toward a catalyst feeder for use in a polymerization process.
Abstract: The invention is a catalyst system including a monocyclopentadienyl titanium compound and an alumoxane component which is highly productive for polymerizing ethylene and &agr;-olefins to produce a high molecular weight ethylene-&agr;-olefin copolymer having a high content of &agr;-olefin.
Abstract: Films, made of polyethylenes and filers, and articles made therefrom greater WVTR than previously available films based on conventional Zeigler-Natta based polyethylenes. The polyethylenes are produced in a metallocene-catalyzed production process. The films may be made by a cast film process, and may be made in widely varying filler content, generally polyethylene to filler ratios of 30/70 to 70/30. The metallocene based polyethylenes when combined with filler also permit the extrusion of thinner films leading to lighter weight and softer films. The m-polyethylenes utilized for making such films typically have a Composition Distribution Breadth Index above 50%, a Mw/Mn below 3, and a Mz/Mw below 2.
Type:
Grant
Filed:
August 1, 1996
Date of Patent:
November 6, 2001
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
Jeffrey Alan Middlesworth, Kevin Arthur Brady