Patents by Inventor Dennis B. Malpass
Dennis B. Malpass has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6046347Abstract: A catalytically active aluminoxane can be synthesized from a precursor formed by the combination of at least one trialkylaluminum compound and at least one organoaluminum compound containing a carbon-oxygen bond therein, such as an alkoxy group-containing organoaluminum compound of the formula (CH.sub.3).sub.2 Al--O--R, where R is alkyl.Type: GrantFiled: September 24, 1998Date of Patent: April 4, 2000Assignee: Akzo Nobel nvInventors: Paul D. Jones, Dennis B. Malpass, Elliot I. Band, Gregory M. Smith, Barbara L. Simms Hudock
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Patent number: 5910270Abstract: Hydrocarbon solutions of a dialkylmagnesium compound having reduced viscosity contain: (a) a hydrocarbon solvent; (b) a dialkylmagnesium compound normally soluble in hydrocarbon solvents; and (c) an effective viscosity reducing amount of a compound selected from the group consisting of a compound having silicon-oxygen bonding, a compound having silicon-nitrogen bonding, and mixtures thereof. Representative viscosity reducing agents include: tetraalkylorthosilicate compounds, such as those of the general formula Si(OR).sub.4, where R is an alkyl group containing from 1 to about 4 carbon atoms, as exemplified by tetraethylorthosilicate; alkylsilazane compounds, including a hexaalkyldisilazane compound containing from 1 to about 4 carbon atoms in the alkyl groups therein as exemplified by hexamethyldisilazane; and silicone oil.Type: GrantFiled: August 19, 1997Date of Patent: June 8, 1999Assignee: Akzo Nobel nvInventors: Paul D. Jones, Dennis B. Malpass, Gregory M. Smith
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Patent number: 5831109Abstract: The present invention relates to a process which comprises the non-hydrolytic transformation of an aluminoxane precursor composition, comprising carbon-to-oxygen bonds which can be alkylated by an alkylaluminum moiety, into a catalytically useful aluminoxane composition. In one embodiment of this invention, the catalytically useful aluminoxane composition is a polymethylaluminoxane composition substantially free of trimethylaluminum. The intermediate precursor is formed by the reaction of a trialkylaluminum compound, or a mixture of trialkylaluminum compounds, and a compound containing a carbon-to-oxygen bond, such as an alcohol, ketone, carboxylic acid, or carbon dioxide. Either unsupported or supported polymethyl-aluminoxane compositions can be formed.Type: GrantFiled: December 22, 1995Date of Patent: November 3, 1998Assignee: Akzo Nobel nvInventors: Gregory M. Smith, Stanley W. Palmaka, Jonathan S. Rogers, Dennis B. Malpass
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Patent number: 5777143Abstract: A hydrocarbon-soluble alkylaluminoxane composition, such as, methylaluminoxane or even a modified methylaluminoxane, can be prepared by preparing an alkylaluminoxane precursor via non-hydrolytic means, such as, by treating at least one trialkylaluminum compound with a compound containing an oxygen-carbon bond, adding to that precursor an effective amount of an organoaluminum compound which prevents formation of insoluble species, such as, a trialkylaluminum compound where each alkyl group contains two or more carbon atoms, and converting that modified precursor to an alkylaluminoxane, such as, by thermolysis. In a distinct embodiment of the invention, if an insoluble methylaluminoxane product is formed using the non-hydrolytic technique, it can be solubilized by treatment with a solubilizing amount of an alkylaluminoxane, prepared by either hydrolytic or non-hydrolytic means, wherein the alkyl moieties contain two or more carbon atoms.Type: GrantFiled: October 25, 1996Date of Patent: July 7, 1998Assignee: Akzo Nobel NVInventors: Dennis B. Malpass, Stanley W. Palmaka, Gregory M. Smith, Jonathan S. Rogers
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Patent number: 5731451Abstract: A process is disclosed for forming an aluminoxane composition comprising methylaluminoxane by mixing trimethylaluminum, or a mixture of trimethylaluminum and one or more other trihydrocarbylaluminum compounds, with an organoaluminum compound containing a trialkylsiloxide moiety and then oxygenating the mixture to form the aluminoxane. Oxygenation can be carried out by controlled hydrolysis or by treatment with an organic compound containing carbon-oxygen bonds, such as carbon dioxide. A preferred trialkylsiloxide moiety is of the formula --OSi(CH.sub.3).sub.3, such as in a compound of the formula (CH.sub.3).sub.2 AlOSi(CH.sub.3).sub.3.Type: GrantFiled: July 12, 1996Date of Patent: March 24, 1998Assignee: Akzo Nobel NVInventors: Gregory M. Smith, Dennis B. Malpass, Stanley W. Palmaka
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Patent number: 5728855Abstract: The present invention relates to a process for forming a composition comprising oligomeric alkylaluminoxane, e.g., preferably methylaluminoxane, and moieties having the structure--OC(R).sub.3, where R is, for example, methyl, which comprises initially treating a composition comprising trialkylaluminum with a reagent containing a carbon-oxygen double bond, such as, carbon dioxide, followed by hydrolysis of the resulting composition with water.Another embodiment of the invention a composition comprising oligomeric methylaluminoxane and greater than 10 mole % of moieties of the structure --OC(R).sub.3, where R is methyl, which, when such composition is hydrolyzed, there is an evolution of hydrolysis products of methane and at least one C.sub.2 or higher alkane, such as t-butane.Type: GrantFiled: May 22, 1996Date of Patent: March 17, 1998Assignee: Akzo Nobel NVInventors: Gregory M. Smith, Dennis B. Malpass
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Patent number: 5416229Abstract: Polymethylaluminoxane compositions having increased solution stability in organic solvent and, in some cases, increased polymerization activity, which comprise moieties derived from an organic compound containing an electron-rich heteroatom (e.g., from Group V and/or Group VI of the Periodic Table) and a hydrocarbyl moiety. These compositions can be formed by reaction of trimethylaluminum, the organic compound, and water. They can also be formed by reaction of pre-formed polymethylaluminoxane the organic compound, which can be a hydrocarbyl group-containing compound containing an electron-rich heteroatom (e.g., oxygen, nitrogen, or sulfur), either with or without an active hydrogen atom connected to the heteroatom. The organic compound, in some embodiments, has also been found to be effective in increasing the catalytic activity of modified polymethylaluminoxane which, in addition to methyl, contain C.sub.2 and higher alkyl groups for enhanced solution stability.Type: GrantFiled: April 14, 1994Date of Patent: May 16, 1995Assignee: Akzo Nobel Chemicals Inc.Inventors: Nam H. Tran, Dennis L. Deavenport, Dennis B. Malpass, Constance S. Rabbitt
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Patent number: 5329032Abstract: Polymethylaluminoxane compositions having increased solution stability in organic solvent and, in some cases, increased polymerization activity, which comprise moieties derived from an organic compound containing an electron-rich heteroatom (e.g., from Group V and/or Group VI of the Periodic Table) and a hydrocarbyl moiety. These compositions can be formed by reaction of trimethylaluminum, the organic compound, and water. They can also be formed by reaction of pre-formed polymethylaluminoxane the organic compound, which can be a hydrocarbyl group-containing compound containing an electron-rich heteroatom (e.g., oxygen, nitrogen, or sulfur), either with or without an active hydrogen atom connected to the heteroatom. The organic compound, in some embodiments, has also been found to be effective in increasing the catalytic activity of modified polymethylaluminoxane which, in addition to methyl, contain C.sub.2 and higher alkyl groups for enhanced solution stability.Type: GrantFiled: March 18, 1992Date of Patent: July 12, 1994Assignee: Akzo Chemicals Inc.Inventors: Nam H. Tran, Dennis L. Deavenport, Dennis B. Malpass, Connie S. Rabbit
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Patent number: 5206401Abstract: The efficient production of alkylaluminoxane by the reaction of water, e.g., in the form of atomized water, and trialkylaluminum, e.g., trimethylaluminum, in an organic solvent medium can be achieved using a preformed alkylaluminoxane as a reaction moderator in the reaction mixture.Type: GrantFiled: June 7, 1991Date of Patent: April 27, 1993Assignee: Akzo Chemicals Inc.Inventors: Dennis L. Deavenport, James T. Hodges, III, Dennis B. Malpass, Nam H. Tran
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Patent number: 5086024Abstract: A catalyst system for the polymerization of olefins is disclosed which comprises a metallocene component, for example, organometallic coordination compounds of a Group IVB or Group VB hydrolysis products comprising methane and C.sub.2 or higher alkanes, such as isobutane, n-butane or n-hexane.Type: GrantFiled: August 1, 1990Date of Patent: February 4, 1992Assignee: Texas Alkyls, Inc.Inventors: Clark C. Crapo, Dennis B. Malpass
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Patent number: 5063188Abstract: A catalyst component, adapted for use in the polymerization and copolymerization of ethylene, is formed by reaction of an organomagnesium compound and a tetraaalkyl silicate, contact of the resulting product with a chlorinating reagent, and treatment of the product from the previous step with liquid titanium halide.Type: GrantFiled: April 6, 1990Date of Patent: November 5, 1991Assignee: Texas Alkyls, Inc.Inventors: Dennis B. Malpass, Bor-Ping E. Wang
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Patent number: 5059703Abstract: Copper alkoxy alkoxides of the formula CuOR or Cu(OR).sub.2, where R is derived from an alkoxy alkanol of from 3 to 8 carbon atoms, are superconducting ceramic precursors. They can be formed by reacting an alkoxy alkanol with a copper alkoxide. Compositions containing theser alkoxides solubilized in an organic solvent, such as toluene, can be prepared by the additional use of a barium alkoxide solubilization agent.Type: GrantFiled: April 7, 1989Date of Patent: October 22, 1991Assignee: Texas Alkyls, Inc.Inventors: Andrzej M. Piotrowski, Dennis B. Malpass
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Patent number: 5041585Abstract: Aluminoxanes can be produced by contacting an organic solvent containing a trialkylaluminum compound with an atomized spray of water. If desired, a pore-formed aluminoxane can be present as a reaction moderator.Type: GrantFiled: June 8, 1990Date of Patent: August 20, 1991Assignee: Texas Alkyls, Inc.Inventors: Dennis L. Deavenport, James T. Hodges, III., Dennis B. Malpass, Nam H. Tran
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Patent number: 5041584Abstract: Methylaluminoxane can be formed by the reaction of a tetraalkyldialuminoxane containing C.sub.2 or higher alkyl groups with trimethylaluminum with the trimethylaluminum being present in an amount which is not present in stoichiometric excess. Another embodiment of the present invention involves the synthesis of the methylaluminoxane by reaction of a trialkylaluminum compound or a tetraalkyldialuminoxane containing C.sub.2 or higher alkyl groups with water to form a polyalkylaluminoxane with is then reacted with trimethylaluminum. A third embodiment of the present invention involves the synthesis of the methylaluminoxane by reaction of the aforementioned polyalkylaluminoxane with trimethylaluminum and then with water.Type: GrantFiled: August 1, 1990Date of Patent: August 20, 1991Assignee: Texas Alkyls, Inc.Inventors: Clark C. Crapo, Dennis B. Malpass
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Patent number: 4960878Abstract: Methylaluminoxane can be formed by the reaction of a tetraalkyldialuminoxane containing C.sub.2 or higher alkyl groups with trimethylaluminum with the trimethylaluminum being present in an amount which is not present in stoichiometric excess. Another embodiment of the present invention involves the synthesis of the methylaluminoxane by reaction of a trialkylaluminum compound or a tetraalkyldialuminoxane containing C.sub.2 or higher alkyl groups with water to form a polyalkylaluminoxane which is then reacted with trimethylaluminum. A third embodiment of the present invention involves the synthesis of the methylaluminoxane by reaction of the aforementioned polyalkylaluminoxane with trimethylaluminum and then with water.Type: GrantFiled: December 2, 1988Date of Patent: October 2, 1990Assignee: Texas Alkyls, Inc.Inventors: Clark C. Crapo, Dennis B. Malpass
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Patent number: 4910178Abstract: Adducts of a trialkylaluminum or a dialkylaluminum hydride and diisoalkenyl benzene compounds have been discovered. Catalyst components for the polymerization of olefins have also been developed which comprise, as the cocatalyst, the reaction product of a trialkylaluminum or a dialkylaluminum hydride (e.g., diisobutylaluminum hydride) and an alkenyl-substituted benzene (e.g., diisopropenyl benzene).Type: GrantFiled: September 30, 1988Date of Patent: March 20, 1990Assignee: Texas Alkyls, Inc.Inventors: Dennis B. Malpass, Michael J. Breen, Loyd W. Fannin
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Patent number: 4904788Abstract: Hydrocarbon-soluble complexes of magnesium alkoxides with magnesium amides are described. The magnesium amide moiety is derived from an amine (e.g., an N-heterocyclic amine). The complexes can be formed by reaction between a magnesium alkyl and a mixture of aliphatic alcohols and an amine.Type: GrantFiled: June 7, 1988Date of Patent: February 27, 1990Assignee: Texas Alkyls, Inc.Inventors: Andrzej M. Piotrowski, Dennis B. Malpass
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Patent number: 4885406Abstract: Hydrocarbon-soluble complexes of magnesium alkoxides with magnesium aryl oxides are described. The magnesium aryl oxide moiety is derived from a hindered aromatic alcohol. The complexes can be formed by reaction between a magnesium alkyl and a mixture of aliphatic alcohols and a hindered aromatic alcohol.Type: GrantFiled: July 5, 1988Date of Patent: December 5, 1989Assignee: Texas Alkyls, Inc.Inventors: Andrzej M. Piotrowski, Dennis B. Malpass
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Patent number: 4876318Abstract: Compounds of the formula ##STR1## where R is alkyl, R' is independently selected from alkyl and aryl, and n ranges from 1 to 8 are useful as coupling agents in filled polymer compositions, e.g., in filled, polar polymers such as polybutylene terephthalate.Type: GrantFiled: July 19, 1988Date of Patent: October 24, 1989Assignee: Texas Alkyls, Inc.Inventors: Dennis B. Malpass, Kelly B. Triplett, Andrzej M. Piotrowski
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Patent number: 4851489Abstract: Generally, linear polyethylene containing long chain branching is obtained by polymerizing ethylene in the presence of a catalyst comprising a transition metal compound such as titanium chloride, an organoaluminum compound represented by the formula R.sub.1 R.sub.2 AlR.sub.p wherein R.sub.1 and R.sub.2 are the same or different hydrocarbyl groups having from 1 to 18 carbon atoms and R.sub.p is a polymeric hydrocarbyl group containing long chain branching aluminum alkyl cocatalyst.Type: GrantFiled: January 13, 1986Date of Patent: July 25, 1989Assignee: Exxon Research & Engineering CompanyInventor: Dennis B. Malpass