Abstract: The invention is a catalyst system including a monocyclopentadienyl titanium compound, where the monocyclopentadienyl group is bonded to a silylene-imido moiety which is further bonded to the titanium atom, 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: Polyolefin/filler breathable films may be produced by machine or transverse direction orientation using interdigitating grooved rollers. Biaxial orientation to similarly produce breathable films may be accomplished by the same method. By heating the rollers, the breathability of the film is increased without increasing the depth of engagement of the interdigitating rollers.
Abstract: Alcohols suitable for plasticizer ester manufacture and acids are made by cofeeding olefins to oxonation, aldolizing the resulting aldehyde and hydrogenating the resulting unsaturated aldehydes, optionally dehydrating a part of the alcohol thereby made and returning the resulting olefin to oxonation, or oxidizing the aldehydes.
Abstract: The lubricity of low sulfur content middle distillate fuel oil boiling over a temperature range of 100°C. to 500°C. is enhanced by incorporation of a heavy fuel component having hydrocarbon components resulting from distillation of a crude oil, whereby the incorporation of the heavy fuel component increases at least one of (a) the 50% distillation temperature, and (b) the polynuclear aromatic content of the composition, and wherein the composition gives a wear scar diameter, as measured by the HFRR test at 60°C., of at most 500 &mgr;m.
Abstract: The antiwear performance of power transmitting fluids, particularly continuously variable transmission fluids, is improved by incorporating an additive combination of amine phosphates, organic polysulfides, zinc salts of phosphorothioic acid esters and optionally a friction modifier.
Type:
Grant
Filed:
March 9, 1998
Date of Patent:
July 17, 2001
Assignee:
Exxon Chemical Patents Inc
Inventors:
Philip Reeve, Neville J Carter, Robert Walter Humphrey, Donald Glenn Young
Abstract: A process for rendering films, film composites, and articles made therefrom less resistant to passage of water vapor by passing a filled precursor film or film composite through the nip of interdigitating grooved rollers. The films or film composites are generally formed using a precursor film of a film forming polyolefin or polyolefin blend, with a relatively high filler loading and optionally an elastomer. A process is disclosed for making diapers or other disposable items where a relatively high water vapor is coupled with a resistance to liquid strikethrough. In one embodiment of the invention, the interdigitating grooved rollers are maintained in a temperature range of from about 91° F. to about 159° F.
Abstract: A process for reproducibly forming a thermally and oxidatively stable high hydroxyl glycerol di-ester compound which is particularly useful as a lubricant. The glycerol di-ester compound is formed by reacting a glycidyl ester with an excess of a neo acid salt. The di-ester product is produced in a nearly quantitative conversion and is readily recoverable from the reaction mixture via a water wash, vacuum dry, and a mild wiped film evaporator treatment.
Type:
Grant
Filed:
November 9, 1998
Date of Patent:
July 3, 2001
Assignee:
Exxon Chemical Patents Inc.
Inventors:
Michael J. Keenan, Martin A. Krevalis, David W. Turner
Abstract: A polymer of ethylene and at least one alpha olefin having at least 5, carbon atoms obtainable by a continuous gas phase polymerization using supported catalyst of an activated molecularly discrete catalyst such as a metallocene in the substantial absence of an aluminum alkyl based scavenger which polymer has a Melt Index (MI) as herein defined of from 0.1 to 15; a Compositional Distribution Breadth Index (CDBI) as defined herein of at least 70%, a density of from 0.910 to 0.930 g/ml; a Haze value as herein defined of less than 20%; a Melt Index ratio (MIR) as herein defined of from 35 to 80; an averaged Modulus (M) as herein defined of from 20 000 to 60 000 psi (pounds per square inch) and a relation between M and the Dart Impact Strength in g/mil (DIS) complying with the formula:
DIS≧0.8×[100+e(11.71−0.000268×M+2.183×10−9×M2)].
Type:
Grant
Filed:
March 26, 1998
Date of Patent:
July 3, 2001
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
Ching-Tai Lue, Natalie A. Merrill, Michael E. Muhle, George Alan Vaughan
Abstract: In the preparation of thermoplastic elastomers by hydrosilylation crosslinking of the elastomeric component, the use of an elastomer containing a non-conjugated diene and having a Mooney viscosity within the MST range of 45 to 100 provides products with a high level of crosslinking and an improved combination of physical properties. This improvement is obtained even at low concentrations of hydrosilylation catalyst.
Type:
Grant
Filed:
October 29, 1999
Date of Patent:
June 26, 2001
Assignees:
Advanced Elastomer Systems, L.P., Exxon Chemical Patents, Inc.
Inventors:
Robert E. Medsker, Donald R. Hazelton, Gary W. Gilbertson, Sabet Abdou-Sabet, Kuo-Shein Shen, Ronald L. Hazelton, Periagaram S. Ravishankar
Abstract: Compositions comprising copolymers of ethylene and an ester of an unsaturated alcohol and a carboxylic acid having at least 3 carbon atoms improve the low temperature properties of fuel oils.
Type:
Grant
Filed:
June 12, 1997
Date of Patent:
June 19, 2001
Assignee:
Exxon Chemical Patents Inc.
Inventors:
Brian William Davies, Tuncel Ibrahim, Dhanesh Gordon Goberdhan
Abstract: A process is described wherein olefins or acetylenic compounds are reacted with sulfurised intermediates to produce nitrile seal compatible additives. Olefin or acetylinic compound reaction with sulfurised compounds e.g. sulfurised phenols results in low chlorine additives. Also disclosed is a process for the production of low chlorine intermediates.
Type:
Grant
Filed:
July 24, 1998
Date of Patent:
June 12, 2001
Assignee:
Exxon Chemical Patents Inc.
Inventors:
Philip Skinner, Dennis J. Simpkin, David Robert Adams
Abstract: The invention relates to novel Thermoplastic Olefin compositions comprising polypropylene, and ethylene-alpha olefin elastomer and a compatabilizer comprising an ethylene-propylene copolymer having a propylene content of greater than 80 weight percent. The ethylene-propylene copolymer compatabilizer imparts a greater degree of compatibility between the polypropylene and elastomer phases yielding improved physical properties.
Type:
Grant
Filed:
June 15, 1998
Date of Patent:
June 12, 2001
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
Lawrence George Kaufman, Charles Cozewith, Avinash Chandrakant Gadkari, Narayanaswami Raja Dharmarajan, Maria Dolores Ellul
Abstract: An ionic polymerization catalyst system component comprising a stable and bulky anion containing a plurality of boron atoms, such as those selected from the group consisting of polynuclear boranes, carboranes, and metallacarboranes useful for polymerizing olefins, diolefins, or acetylenically unsaturated monomers, either alone or in combination with each other or with other polymerizable monomers is disclosed. A method of using the anion to stabilize ionic catalyst systems during polymerization is also disclosed.
Abstract: A lubricating oil composition is disclosed comprising at least 10% by weight of the total oil composition of an ester of phthalic acid having a viscosity index less than 100. The lubricating oil composition has improved fuel economy and wear performance.
Type:
Grant
Filed:
November 12, 1998
Date of Patent:
May 22, 2001
Assignee:
Exxon Chemical Patents Inc.
Inventors:
Alexander B. Boffa, Thomas R. Bidwell, Joe R. Noles, Jr.
Abstract: The present invention relates to polypropylene copolymer alloys which are especially suited for soft fiber and fabric applications. These alloys comprise an ethylene-propylene random copolymer having an ethylene content of from about 1.0 to 5.0% by weight, in an amount of from about 40 to 90% by weight of the alloy; and an ethylene-propylene bipolymer having an ethylene content of from about 10 to 30% by weight, in an amount of from about 10 to 60% by weight of the alloy. The present invention further relates to fiber and fabric articles made from such alloys.
Type:
Grant
Filed:
March 4, 1997
Date of Patent:
May 22, 2001
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
George Byron Georgellis, Chia Yung Cheng, William Moa-Tseng Chien