Patents by Inventor Donald F. Birkelbach
Donald F. Birkelbach 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: 4451626Abstract: Alpha olefins are polymerized in the presence of catalyst compositions which are the catalytic reaction products of (A) the reaction product or complex resulting from the mixing of (1) a mixture of a transition metal compound such as a tetraalkoxy titanium compound, a non-metallic oxygen-containing compound such as an alcohol and (2) a reducing alkylating agent such as a dialkyl magnesium compound and (B) a magnesium halide.Type: GrantFiled: March 30, 1983Date of Patent: May 29, 1984Assignee: The Dow Chemical CompanyInventors: Randall S. Shipley, Donald F. Birkelbach
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Patent number: 4409126Abstract: Compositions consisting of the reaction product or complex resulting from the mixing of a transition metal compound such as a tetraalkoxy titanium compound and an organo compound of magnesium, aluminum, boron or lithium such as a dialkyl magnesium compound are useful in the preparation of catalysts for polymerizing .alpha.-olefins at ultra-high efficiencies at high polymerization temperatures.Type: GrantFiled: October 22, 1981Date of Patent: October 11, 1983Assignee: The Dow Chemical CompanyInventors: Randall S. Shipley, Donald F. Birkelbach
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Patent number: 4399053Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins are prepared by reacting trivalent or tetravalent titanium compounds such as titanium tetraalkoxides, zirconium compounds such as tri-n-butoxy zirconium chloride, an organomagnesium component such as di-n-hexyl magnesium, a halogen source such as ethyl aluminum dichloride, a divalent zinc compound such as diethyl zinc and an organoaluminum compound if the halide source or magnesium component does not contain sufficient quantities of aluminum. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions and lower melt indices than do corresponding catalysts without both the divalent zinc and zirconium compounds.Type: GrantFiled: December 24, 1980Date of Patent: August 16, 1983Assignee: The Dow Chemical CompanyInventors: Randall S. Shipley, Donald F. Birkelbach, Kirby Lowery, Jr.
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Patent number: 4380508Abstract: Compositions consisting of the reaction product or complex resulting from the mixing of (1) a mixture of a transition metal compound such as a tetraalkoxy titanium compound with a non-metallic oxygen-containing compound such as an alcohol and (2) a strongly reducing alkylating agent such as a dialkyl magnesium compound are useful in the preparation of catalysts for polymerizing .alpha.-olefins at ultra-high efficiencies at high polymerization temperatures.Type: GrantFiled: October 22, 1981Date of Patent: April 19, 1983Assignee: The Dow Chemical CompanyInventors: Randall S. Shipley, Donald F. Birkelbach
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Patent number: 4323665Abstract: .alpha.-Olfins, particularly higher olefins, are polymerized in the presence of a catalyst prepared by reacting (A) tetravalent tianium compounds such as titanium tetraalkoxide, (B) an organoaluminum compound, (C) an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an organoaluminum compound such as triethyl aluminum and, (D) as a halide source, a tetravalent tin compound such as tin tetrachloride. Polymers prepared by this process provide higher efficiencies than polymers prepared from a process utilizing catalysts employing HCl as the halide source.Type: GrantFiled: April 14, 1980Date of Patent: April 6, 1982Assignee: The Dow Chemical Co.Inventors: Kirby Lowery, Jr., Donald F. Birkelbach, Randall S. Shipley
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Patent number: 4308369Abstract: Olefins are polymerized in the presence of a catalyst prepared by reacting tetravalent titanium compounds such as a titanium tetraalkoxide, an anhydrous zinc compound such as diethyl zinc, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum and a halide source such as a hydrogen halide or an alkyl aluminum halide and an aluminum compound if the halide source or organomagnesium component does not contain sufficient quantities of aluminum. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions than do corresponding catalysts without the anhydrous zinc compound.Type: GrantFiled: June 2, 1980Date of Patent: December 29, 1981Assignee: The Dow Chemical CompanyInventors: Randall S. Shipley, Donald F. Birkelbach, Kirby Lowery, Jr.
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Patent number: 4243785Abstract: .alpha.-Olefins are polymerized by conducting the polymerization in the presence of a catalyst prepared by reacting tetravalent or trivalent titanium compounds such as a titanium tetralkoxide, an anhydrous nickel compound such as nickel chloride, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum and a halide source such as a hydrogen halide or an alkyl aluminum halide. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions than do corresponding catalysts without the anhydrous nickel compound.Type: GrantFiled: September 5, 1978Date of Patent: January 6, 1981Assignee: The Dow Chemical CompanyInventors: Donald F. Birkelbach, George W. Knight
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Patent number: 4238355Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins, particularly higher olefins, are prepared by reacting tetravalent or trivalent titanium compounds such as a titanium tetraalkoxide, an anhydrous zinc compound such as diethyl zinc, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum and a halide source such as a hydrogen halide or an alkyl aluminum halide and an aluminum compound if the halide source of organomagnesium component does not contain sufficient quantities of aluminum. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions than do corresponding catalysts without the anhydrous zinc compound.Type: GrantFiled: September 10, 1979Date of Patent: December 9, 1980Assignee: The Dow Chemical CompanyInventors: Randall S. Shipley, Donald F. Birkelbach, Kirby Lowery, Jr.
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Patent number: 4224186Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins, particularly higher olefins, are prepared by reacting (A) tetravalent titanium compounds such as titanium tetraalkoxide, (B) an organoaluminum compound, (C) an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an organo aluminum compound such as triethyl aluminum and, (D) as a halide source, a tetravalent tin compound such as tin tetrachloride. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts provide higher efficiencies than those catalysts employing HCl as the halide source.Type: GrantFiled: April 9, 1979Date of Patent: September 23, 1980Assignee: The Dow Chemical CompanyInventors: Kirby Lowery, Jr., Donald F. Birkelbach, Randall S. Shipley
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Patent number: 4198315Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins, particularly higher olefins, are prepared by reacting tetravalent or trivalent titanium compounds such as a titanium tetralkoxide, an anhydrous nickel compound such as nickel chloride, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum and a halide source such as a hydrogen halide or an alkyl aluminum halide. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions than do corresponding catalysts without the anhydrous nickel compound.Type: GrantFiled: September 5, 1978Date of Patent: April 15, 1980Assignee: The Dow Chemical CompanyInventors: Donald F. Birkelbach, George W. Knight
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Patent number: 4189553Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins, particularly higher olefins, are provided by reacting a trivalent titanium halide complex such as an alcohol complex of titanium trichloride, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum and halide source such as a hydrogen halide or an alkyl aluminum halide. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.Type: GrantFiled: June 2, 1978Date of Patent: February 19, 1980Assignee: The Dow Chemical CompanyInventor: Donald F. Birkelbach
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Patent number: 4120820Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins, particularly higher olefins, are provided by reacting a trivalent titanium halide complex such as an alcohol complex of titanium trichloride, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum and halide source such as a hydrogen halide or an alkyl aluminum halide. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.Type: GrantFiled: December 1, 1976Date of Patent: October 17, 1978Assignee: The Dow Chemical CompanyInventor: Donald F. Birkelbach