Patents Represented by Attorney John W. Whitson
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Patent number: 4277372Abstract: The transition metal component of a Ziegler-Natta catalyst is composed of a titanium halide deposited on a magnesium chloride support. The support is prepared by a process involving reaction of a magnesium alkanoate with an alkylaluminum dichloride in a hydrocarbon solvent and treatment of the magnesium chloride particles formed in the reaction with a hydrocarbon solvent and with an electron donor, preferably an aliphatic ether.Type: GrantFiled: January 9, 1980Date of Patent: July 7, 1981Assignee: Hercules IncorporatedInventor: Albert S. Matlack
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Patent number: 4273892Abstract: Hydrophilic polyolefin fibers may be prepared, for example, by discharging a heated and pressurized solution of an anionic polyolefin composition containing carboxylic functionality into a zone of reduced temperature and pressure, and then modifying the fibers so produced by treatment with an aqueous admixture of selected cationic and anionic water-soluble, nitrogen-containing polymers. Blends of the hydrophilic fibers with wood pulp provide paper products having improved physical properties.Type: GrantFiled: January 25, 1979Date of Patent: June 16, 1981Assignee: Hercules IncorporatedInventor: Terence W. Rave
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Patent number: 4267294Abstract: In the polymerization of 1-olefins using a solid catalyst component composed of a titanium halide deposited on an anhydrous, essentially magnesium halide support and an activator component composed of a trialkylaluminum and a lower alkyl ester of an aromatic carboxylic acid, the decay in activity of the catalyst is delayed by replacing a portion of the trialkylaluminum in the activator component with a dialkylaluminum hydride.Type: GrantFiled: December 18, 1979Date of Patent: May 12, 1981Assignee: Hercules IncorporatedInventor: Wendell P. Long
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Patent number: 4260711Abstract: In the polymerization of 1-olefins using a solid catalyst component composed of a titanium trichloride and an activator component composed of a trialkylaluminum, the stereospecificity of the catalyst is increased by replacing a portion of the trialkylaluminum in the activator component with a dialkylaluminum dialkylphosphate.Type: GrantFiled: April 21, 1980Date of Patent: April 7, 1981Assignee: Hercules IncorporatedInventor: Richard V. Cartwright
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Patent number: 4250287Abstract: In the polymerization of 1-olefins using a solid catalyst component composed of a titanium halide deposited on an anhydrous, essentially magnesium halide support and an activator component composed of a trialkylaluminum and an alkyl ester of an aromatic carboxylic acid, the productivity of the catalyst is increased by including a halosilane in the activator component.Type: GrantFiled: March 14, 1980Date of Patent: February 10, 1981Assignee: Hercules IncorporatedInventor: Albert S. Matlack
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Patent number: 4240935Abstract: Improved paper sizing compositions are composed of a ketene dimer, an anionic dispersing agent such as sodium lignin sulfonate, certain water-soluble, cationic resins and water. Exemplary of the cationic resins is the reaction product of epichlorohydrin and the aminopolyamide derived from adipic acid and diethylenetriamine.Type: GrantFiled: December 22, 1978Date of Patent: December 23, 1980Assignee: Hercules IncorporatedInventor: David H. Dumas
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Patent number: 4211670Abstract: An improved titanium trichloride catalyst component is prepared by treating a crude titanium trichloride composition with two different electron donor compounds via successive treatment with first one of the donor compounds and then with the other. The treated composition provides greater stereospecificity in the polymerization and copolymerization of propylene.Type: GrantFiled: January 25, 1979Date of Patent: July 8, 1980Assignee: Hercules IncorporatedInventor: Edwin J. Vandenberg
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Patent number: 4186107Abstract: The transition metal component of a Ziegler-Natta catalyst is composed of a titanium halide deposited on a magnesium halide support. The support is prepared by a process involving reaction of a dialkyl magnesium with an alkyl aluminum halide in a hydrocarbon solvent and including treatment of the magnesium halide formed in the reaction with an electron donor, preferably a dialkyl ether.Type: GrantFiled: April 14, 1978Date of Patent: January 29, 1980Assignee: Hercules IncorporatedInventor: Kalus P. Wagner
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Patent number: 4158595Abstract: Hydrophilic fibers may be prepared by discharging a heated and pressurized dispersion of a styrene-maleic anhydride copolymer into a zone of reduced temperature and pressure, and then modifying the fibers so produced by treatment with an aqueous admixture of selected cationic and anionic water-soluble, nitrogen-containing polymers. Blends of the hydrophilic fibers with wood pulp provide paper products having improved physical properties.Type: GrantFiled: July 27, 1977Date of Patent: June 19, 1979Assignee: Hercules IncorporatedInventor: Terence W. Rave
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Patent number: 4156628Abstract: Hydrophilic polyolefin fibers may be prepared, for example, by discharging a heated and pressurized solution of an anionic polyolefin composition containing carboxylic functionality into a zone of reduced temperature and pressure, and then modifying the fibers so produced by treatment with an aqueous admixture of selected cationic and anionic water-soluble, nitrogen-containing polymers. Blends of the hydrophilic fibers with wood pulp provide paper products having improved physical properties.Type: GrantFiled: July 25, 1977Date of Patent: May 29, 1979Assignee: Hercules IncorporatedInventor: Terence W. Rave
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Patent number: 4154646Abstract: Hydrophilic fibers may be prepared by discharging a heated and pressurized dispersion of a styrene-maleic anhydride copolymer into a zone of reduced temperature and pressure, and then modifying the fibers so produced by treatment with an aqueous admixture of selected cationic and anionic water-soluble, nitrogen-containing polymers. Blends of the hydrophilic fibers with wood pulp provide paper products having improved physical properties.Type: GrantFiled: July 22, 1977Date of Patent: May 15, 1979Assignee: Hercules IncorporatedInventor: Terence W. Rave
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Patent number: 4154647Abstract: Hydrophilic polyolefin fibers may be prepared, for example, by discharging a heated and pressurized solution of an anionic polyolefin composition containing carboxylic functionality into a zone of reduced temperature and pressure, and then modifying the fibers so produced by treatment with an aqueous admixture of selected cationic and anionic water-soluble, nitrogen-containing polymers. Blends of the hydrophilic fibers with wood pulp provide paper products having improved physical properties.Type: GrantFiled: July 27, 1977Date of Patent: May 15, 1979Assignee: Hercules IncorporatedInventor: Terence W. Rave
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Patent number: 4151216Abstract: By-product polypropylene may be converted by catalytic cracking into a fuel oil product having the viscosity necessary to permit it to be pumped and stored at the temperatures normally used for fuel oils. The cracking process is carried out at a temperature of, for example, 450.degree. C. in a tubular reactor using a silica-on-alumina catalyst.Type: GrantFiled: October 25, 1977Date of Patent: April 24, 1979Assignee: Hercules IncorporatedInventor: Vernon C. Smith
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Patent number: 4144218Abstract: This invention relates to poly(arylacetylene) thermosetting compositions and thermoset resins prepared therefrom. The thermosetting compositions comprise a poly(phenylene oxide) and a polyacetylenically unsaturated prepolymer of a polyacetylenically substituted aromatic compound such as diethynylbenzene. The prepolymer has a number average molecular weight of about 900 to about 12,000 and contains from about 5 to about 20% by weight of terminal acetylenic groups. A representative poly(phenylene oxide) is poly(2,6-dimethyl-1,4-phenylene oxide).Type: GrantFiled: July 8, 1977Date of Patent: March 13, 1979Assignee: Hercules IncorporatedInventor: James E. French
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Patent number: 4120909Abstract: Ethynylbenzenes are prepared by the vapor phase catalytic dehydration of methyl phenyl ketones. The dehydration process is carried out at temperatures of from about 500.degree. to about 650.degree. C. using an alumina-containing catalyst. An example of the process is the dehydration of acetophenone to form phenylacetylene.Type: GrantFiled: August 11, 1977Date of Patent: October 17, 1978Assignee: Hercules IncorporatedInventor: Ali Amirnazmi
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Patent number: 4113462Abstract: The invention relates to a process and compositions for promoting plant growth. The compositions contain a dithiocarbamic acid derivative such as ammonium dithiocarbamate and preferably also contain a reduced nitrogen fertilizer such as ammonium nitrate.Type: GrantFiled: April 20, 1977Date of Patent: September 12, 1978Assignee: Hercules IncorporatedInventor: Romeo Barrick Wagner
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Patent number: 4113753Abstract: The compounds of this invention are tetravalent organometallic compounds of transition metals wherein the metal is attached to the bridgehead carbons of four bicyclic radicals, namely, 1-bicyclo[2.2.1]-heptyl radicals which contain an alkylidene group attached to either the C.sub.2 or C.sub.7 carbon atom. Typical of these compounds is tetrakis-(1-camphenyl) chromium. These organometallic compounds are particularly effective catalysts for the curing of photochemical compositions.Type: GrantFiled: March 25, 1977Date of Patent: September 12, 1978Assignee: Hercules IncorporatedInventor: Barton Keeley Bower
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Patent number: 4097460Abstract: The invention relates to arylacetylene polymers and thermoset resins prepared therefrom. The preferred thermoset resins are prepared by copolymerizing a polyacetylenically unsaturated prepolymer with about 2 to 70% of a monomeric acetylenically unsaturated aromatic compound that has a melting point below about 185.degree. C. and a boiling point above about 250.degree. C. The polyacetylenically unsaturated prepolymer is a polymer of at least one polyacetylenically substituted aromatic compound such as a diethynylbenzene, which prepolymer has a number average molecular weight of about 900 to 12,000 and contains about 5 to 20% by weight of acetylenic groups. Typical monomeric acetylenic aromatic compounds that are copolymerized with the prepolymer are diphenylacetylene and diphenylbutadiyne.Type: GrantFiled: June 12, 1972Date of Patent: June 27, 1978Assignee: Hercules IncorporatedInventor: Harold Jabloner
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Patent number: 4070333Abstract: The invention relates to poly(arylacetylene) molding compositions and thermoset resins prepared therefrom. The molding compositions comprise blends of a polyacetylenically unsaturated prepolymer and from about 2 to about 70%, by weight of the prepolymer, of a monomeric acetylenically unsaturated aromatic compound having a melting point below about 185.degree. C. and a boiling point above about 250.degree. C. The polyacetylenically unsaturated prepolymer is a polymer of at least one polyacetylenically substituted aromatic compound, such as a diethynylbenzene, which prepolymer has a number average molecular weight of about 900 to 12,000 and contains about 5 to 20% by weight of acetylenic groups. Typical monomeric acetylenic aromatic compounds which are blended with the prepolymer are diphenylacetylene and diphenylbutadiyne.Type: GrantFiled: January 2, 1974Date of Patent: January 24, 1978Assignee: Hercules IncorporatedInventor: Harold Jabloner
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Patent number: 4026860Abstract: The invention relates to thermosetting compositions which are blends of novel poly(arylacetylenes) and, as fluidizers, certain aromatic organic compounds containing at least two aromatic rings. The poly(arylacetylenes) are prepolymers of polyacetylenically substituted aromatic compounds, which prepolymers have a number average molecular weight of from about 900 to about 12,000 and contain from about 5 to about 20% by weight of acetylenic groups. Diethynylbenzene is one of the preferred monomers used in preparation of the prepolymers. Representative of the compounds containing at least two aromatic rings are triphenylphosphine and triphenylphosphine oxide. The compositions are curable by heat to produce thermoset resins which have very desirable physical properties at both normal and high temperatures.Type: GrantFiled: May 27, 1975Date of Patent: May 31, 1977Assignee: Hercules IncorporatedInventor: Lawrence C. Cessna, Jr.