Patents by Inventor Alexander Borisovich Shtarov
Alexander Borisovich Shtarov 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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Publication number: 20230174713Abstract: A copolymer includes 20 mol % to 80 mol % of —CF2CF2O— units, 20 mol % to 80 mol % of —CF(CF3)CF2O— units, and 0 mol % to 45 mol % of one or more additional perfluoroalkyleneoxy units. The copolymer has a molecular weight Mn of 1,500 to 20,000, a viscosity index of 100 to 220, and an average tetrafluoroethylene oxide (TFEO) run length less than 6. A process of forming a perfluoroalkyl polyether copolymer includes feeding a gas stream containing TFEO and hexafluoropropylene oxide (HFPO) into a reactor containing a fluorinated solvent, a fluoride salt, an ether, and an acid fluoride to form an acid fluoride-containing polymer. The process also includes hydrolyzing the acid fluoride-containing polymer to form a perfluoroalkyl polyether carboxylic acid or carboxylate salt. The process further includes distilling off the fluorinated solvent and treating the perfluoroalkyl polyether carboxylic acid or carboxylate salt with elemental fluorine to obtain the perfluoroalkyl polyether copolymer.Type: ApplicationFiled: April 29, 2021Publication date: June 8, 2023Applicant: THE CHEMOURS COMPANY FC, LLCInventors: ALEXANDER BORISOVICH SHTAROV, JON LEE HOWELL, PELIN HACARLIOGLU
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Patent number: 10294393Abstract: Composition containing at least one fluorinated silane of the formula (I): (Rf)p—Y—(SiQkZ3-k)w??(I) wherein: Rf represents monovalent R1f(OC4F8)a—(OC3F6)b—(OC2F4)c—(OCF2)d wherein a, b, c, and d independently represent an integer of from 3 to 200 inclusive, and the sum of a, b, c, and d is at least 1; R1f is fluorinated alkyl group, linear or branched, with 1-4 carbons; Y represents a polyvalent organic group, Q represents a hydrolyzable group, a hydroxyl group, or alkyloxy group and is capable of forming a siloxane bond with Si atoms located at the terminal of the molecular chain of formula (I) or other active sites of the treated surface, Z is a monovalent alkyl group, or hydrogen; p is 1 or 2, w is 2-14, p+w is 3 to 15, and k is from 1 to 3.Type: GrantFiled: March 2, 2017Date of Patent: May 21, 2019Assignee: THE CHEMOURS COMPANY FC, LLCInventor: Alexander Borisovich Shtarov
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Publication number: 20190062592Abstract: Composition containing at least one fluorinated silane of the formula (I): (Rf)p—Y—(SiQkZ3-k)w??(I) wherein: Rf represents monovalent R1f(OC4F8)a—(OC3F6)b—(OC2F4)c—(OCF2)d wherein a, b, c, and d independently represent an integer of from 3 to 200 inclusive, and the sum of a, b, c, and d is at least 1; R1f is fluorinated alkyl group, linear or branched, with 1-4 carbons; Y represents a polyvalent organic group, Q represents a hydrolyzable group, a hydroxyl group, or alkyloxy group and is capable of forming a siloxane bond with Si atoms located at the terminal of the molecular chain of formula (I) or other active sites of the treated surface, Z is a monovalent alkyl group, or hydrogen; p is 1 or 2, w is 2-14, p+w is 3 to 15, and k is from 1 to 3.Type: ApplicationFiled: March 2, 2017Publication date: February 28, 2019Applicant: The Chemours Company FC, LLCInventor: Alexander Borisovich SHTAROV
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Patent number: 9168408Abstract: The present invention relates to aminosulfonate and aminocarboxylate compositions derived from a mixture of polyfluoroalkylsulfonamido alkyl amines including at least one polyfluoroalkylsulfonamido alkyl amine and its analog, a di(polyfluoroalkylsulfonamido alkyl) amine. The aminosulfonate and aminocarboxylate compositions are useful for many purposes including amphoteric surface-active agents and aqueous film forming foams in fire fighting applications.Type: GrantFiled: March 15, 2011Date of Patent: October 27, 2015Assignee: THE CHEMOURS COMPANY FC, LLCInventors: Alexander Borisovich Shtarov, Volodymyr B. Pashovych
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Patent number: 8921300Abstract: A composition of formula I [Rf(CH2)m(O)n]x-A wherein Rf is a straight or branched perfluoroalkyl group having from about 2 to about 20 carbon atoms, or a mixture thereof, m is a positive integer equal to or greater than 3, n is 0 or 1, x is 1 to about 3, and A is ?SO2B, B is N(R2)2 or N(CH2CH3)(CH2CH2OH), R2 is C1 to C4 alkyl.Type: GrantFiled: May 13, 2009Date of Patent: December 30, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Alexander Borisovich Shtarov, Michael Joseph Michalczyk, Charles Kenneth Taylor
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Patent number: 8809577Abstract: A process to prepare fluorinated sulfobetaine compounds of formula (I) wherein Rf is C2 to C10 fluoroalkyl optionally interrupted by one or more of O, CH2, CHF, or combinations thereof; R1 is C1 to C10 alkylene; R2 is C1 to C6 alkylene or a chemical bond; R3 is H or CH3; R4 is C1 to C6 alkylene containing at least one hydroxyl group; R5 is H or CH3; and R6 is H or CH3; comprising contacting a fluorinated sulfonamide amine of formula (II) with an aliphatic chlorosulfonic acid or salt thereof of formula (III) in the presence of water and at least one alkylene glycol, and optionally at least one alkyl carbonate, said fluorinated sulfobetaine having reduced free chloride content and reduced flammability without the need for additional purification steps.Type: GrantFiled: July 20, 2012Date of Patent: August 19, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Stephen James Getty, Peter Michael Murphy, Romain Severac, Alexander Borisovich Shtarov, Hollis Thomas Warren
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Patent number: 8779196Abstract: The present invention relates to a polyfluoroalkylsulfonamido alkyl halide intermediate. The invention also relates to the use of the aforementioned halide intermediate to prepare a mixture of polyfluoroalkylsulfonamido alkyl amines including at least one polyfluoroalkylsulfonamido alkyl amine and its analog, a di(polyfluoroalkylsulfonamido alkyl) amine.Type: GrantFiled: March 15, 2011Date of Patent: July 15, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Alexander Borisovich Shtarov, Volodymyr B. Pashovych
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Patent number: 8729138Abstract: The present invention relates to a mixture of polyfluoroalkylsulfonamido alkyl amines including at least one polyfluoroalkylsulfonamido alkyl amine and its analog, a di(polyfluoroalkylsulfonamido alkyl)amine. The invention also relates to polyfluoroalkylsulfonamido alkyl halide intermediate used to make the aforementioned mixture.Type: GrantFiled: March 15, 2011Date of Patent: May 20, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Alexander Borisovich Shtarov, Volodymyr B. Pashovych
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Publication number: 20140024855Abstract: A process to prepare fluorinated sulfobetaine compounds of formula (I) wherein Rf is C2 to C10 fluoroalkyl optionally interrupted by one or more of O, CH2, CHF, or combinations thereof; R1 is C1 to C10 alkylene; R2 is C1 to C6 alkylene or a chemical bond; R3 is H or CH3; R4 is C1 to C6 alkylene containing at least one hydroxyl group; R5 is H or CH3; and R6 is H or CH3; comprising contacting a fluorinated sulfonamide amine of formula (II) with an aliphatic chlorosulfonic acid or salt thereof of formula (III) in the presence of water and at least one alkylene glycol, and optionally at least one alkyl carbonate, said fluorinated sulfobetaine having reduced free chloride content and reduced flammability without the need for additional purification steps.Type: ApplicationFiled: July 20, 2012Publication date: January 23, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: STEPHEN JAMES GETTY, PETER MICHAEL MURPHY, ROMAIN SEVERAC, ALEXANDER BORISOVICH SHTAROV, HOLLIS THOMAS WARREN
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Publication number: 20130284048Abstract: A composition of formula I [Rf(CH2)m(O)n]x-A wherein Rf is a straight or branched perfluoroalkyl group having from about 2 to about 20 carbon atoms, or a mixture thereof, m is a positive integer equal to or greater than 3, n is 0 or 1, x is 1 to about 3, and A is —P(O)(OR1)y(OM+)3-y-x, —C(O)CH(SO3?M+)CH2C(O)?, —(CH2CH2O)d(CH2CHR2O)eR3, or ?SO2B, M+ is an alkali metal ion, NH4+, or NH2(CH2CH2OH)2, B is N(R)2 or N(CH2CH3)(CH2CH2OH), R1 is C1 to C3 alkyl, and R2 is C1 to C4 alkyl, R3 is H or CH3, y is 0 to about 1, d is 0 to about 16, e is 0 to about 16, provided that (d+e) is from about 3 to about 16 is disclosed.Type: ApplicationFiled: June 24, 2013Publication date: October 31, 2013Inventors: Alexander Borisovich Shtarov, Michael Joseph Michalczyk, Charles Kenneth Taylor
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Patent number: 8258341Abstract: Current methods for making polyfluorosulfonamido amines, which involve the use of a diamine reactant, provide low yields and produce an undesirable fluorine containing bis-sulfonamide by-product representing an economic loss. The bis-sulfonamide by-product is particularly undesirable because it shares very similar physical properties with the desired monoamine product thus making isolation of the desired polyfluorosulfonamido amine product difficult and costly. Furthermore, instead of the efficient incorporation of fluorine to make the desired polyfluorosulfonamido amine product, the bis-sulfonamide by-product constitutes a substantial loss of costly fluorinated starting material. The bis-sulfonamide by-product also constitutes an undesirable impurity that can worsen surfactancy, repellency, or other performance characteristics of the desired polyfluorosulfonamido amine product.Type: GrantFiled: July 10, 2009Date of Patent: September 4, 2012Assignee: E.I. du Pont de Nemours and CompanyInventors: Alexander Borisovich Shtarov, Peter Michael Murphy, Brent Ryan Gonska, Stephan James McLain
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Publication number: 20110233459Abstract: The present invention relates to a mixture of polyfluoroalkylsulfonamido alkyl amines including at least one polyfluoroalkylsulfonamido alkyl amine and its analog, a di(polyfluoroalkylsulfonamido alkyl) amine. The invention also relates to polyfluoroalkylsulfonamido alkyl halide intermediate used to make the aforementioned mixture.Type: ApplicationFiled: March 15, 2011Publication date: September 29, 2011Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Alexander Borisovich Shtarov, Volodymyr B. Pashovych
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Publication number: 20110237834Abstract: The present invention relates to a polyfluoroalkylsulfonamido alkyl halide intermediate. The invention also relates to the use of the aforementioned halide intermediate to prepare a mixture of polyfluoroalkylsulfonamido alkyl amines including at least one polyfluoroalkylsulfonamido alkyl amine and its analog, a di(polyfluoroalkylsulfonamido alkyl) amine.Type: ApplicationFiled: March 15, 2011Publication date: September 29, 2011Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Alexander Borisovich Shtarov, Volodymyr B. Pashovych
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Publication number: 20110232924Abstract: The present invention relates to aminosulfonate and aminocarboxylate compositions derived from a mixture of polyfluoroalkylsulfonamido alkyl amines including at least one polyfluoroalkylsulfonamido alkyl amine and its analog, a di(polyfluoroalkylsulfonamido alkyl) amine. The aminosulfonate and aminocarboxylate compositions are useful for many purposes including amphoteric surface-active agents and aqueous film forming foams in fire fighting applications.Type: ApplicationFiled: March 15, 2011Publication date: September 29, 2011Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: ALEXANDER BORISOVICH SHTAROV, VOLODYMYR. B. PASHOVYCH
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Publication number: 20110009668Abstract: Current methods for making polyfluorosulfonamido amines, which involve the use of a diamine reactant, provide low yields and produce an undesirable fluorine containing bis-sulfonamide by-product representing an economic loss. The bis-sulfonamide by-product is particularly undesirable because it shares very similar physical properties with the desired monoamine product thus making isolation of the desired polyfluorosulfonamido amine product difficult and costly. Furthermore, instead of the efficient incorporation of fluorine to make the desired polyfluorosulfonamido amine product, the bis-sulfonamide by-product constitutes a substantial loss of costly fluorinated starting material. The bis-sulfonamide by-product also constitutes an undesirable impurity that can worsen surfactancy, repellency, or other performance characteristics of the desired polyfluorosulfonamido amine product.Type: ApplicationFiled: July 10, 2009Publication date: January 13, 2011Applicant: E.I. DU POND DE NEMOURS AND COMPANYInventors: Alexander Borisovich Shtarov, Peter Michael Murphy, Brent Ryan Gonska, Stephan James McLain
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Publication number: 20090221466Abstract: A composition of formula I [Rf(CH2)m(O)n]x-A wherein Rf is a straight or branched perfluoroalkyl group having from about 2 to about 20 carbon atoms, or a mixture thereof, m is a positive integer equal to or greater than 3, n is 0 or 1, x is 1 to about 3, and A is —P(O)(OR1)y(OM+)3?y?x, —C(O)CH(SO3?M+)CH2C(O)?, ?(CH2CH2O)d(CH2CHR2O)eR3, or ?SO2B, M+ is an alkali metal ion, NH4+, or NH2(CH2CH2OH)2, B is N(R)2 or N(CH2CH3)(CH2CH2OH), R1 is C1 to C3 alkyl, and R2 is C1 to C4 alkyl, R3 is H or CH3, y is 0 to about 1, d is 0 to about 16, e is 0 to about 16, provided that (d+e) is from about 3 to about 16 is disclosed.Type: ApplicationFiled: May 13, 2009Publication date: September 3, 2009Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Alexander Borisovich Shtarov, Michael Joseph Michalczyk, Charles Kenneth Taylor
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Patent number: 7579498Abstract: A process for preparing fluorinated alkyl carboxylate esters comprises reaction of a silver carboxylate or silver carboxylate precursor, such as silver (I) iodide with a fluorinated alkyl iodide and a carboxylic acid. Preferably the fluorinated alkyl iodide has the general formula CF3(CF2)nCH2CH2I, wherein n is an integer in the range of from 1 to 29 and the carboxylic acid is acetic acid, acrylic acid or methacrylic acid.Type: GrantFiled: November 29, 2005Date of Patent: August 25, 2009Assignee: E. I. du Pont de Nemours and CompanyInventors: Mark Allen Andrews, Alexander Borisovich Shtarov, Joseph Norman Hockman
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Patent number: 7572942Abstract: Various 13C and 14C carbon labeled compounds Rf—bCF(U)y(T)z??Formula 1A or Rf—bCF2bCF(U)y(T)z??Formula 1B wherein Rf is a linear or branched perfluoroalkyl radical Z(CmF2m)—, m is 1, 3 to 20, or a mixture thereof; Z is F when m is 1, and Z is F, Cl, or H when m is 3 to 20 or a mixture thereof; b is 13 or 14; y is 1, and z is 0 or 1; and when y and z are each 1, U is F, and T is selected from the group consisting of monovalent radicals —X wherein X is I or Br, —CH2—CH2—X, —CH?CH2, —CH2—CH2—OH, —CH2—COOH, —CH2OH, —bCH2OH, —COOH, —bCOOH, —O—CF(CF3)—C(O)F, —O—CF(CF3)—X, —SO2Y wherein Y is H, F or Cl, and —SO3H; and when y is 1, and z is 0, U is selected from the group consisting of divalent radicals ?CH—COOH, ?CH—CH2—OH, and ?O, are disclosed, and a process for their preparation which selectively introduces 13C and 14C carbon labels into a fluoroalkyl chain.Type: GrantFiled: December 11, 2007Date of Patent: August 11, 2009Assignee: E. I. du Pont de Nemours and CompanyInventors: Alexander Borisovich Shtarov, Jon Lee Howell
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Patent number: 7553985Abstract: A composition of formula I [Rf(CH2)m(O)n]x-A wherein Rf is a straight or branched perfluoroalkyl group having from about 2 to about 20 carbon atoms, or a mixture thereof, m is a positive integer equal to or greater than 3, n is 0 or 1, x is 1 to about 3, A is —P(O)(OR1)y(OM+)3?y?x, —C(O)CH(SO3?M+)CH2C(O)—, —(CH2CH2O)d(CH2CHR2O)eR3, or —SO2B, M+ is an alkali metal ion, NH4+, or NH2+(CH2CH2OH)2, B is N(R2)2 or N(CH2CH3)(CH2CH2OH), R1 is C1 to C3 alkyl, R2 is C1 to C4 alkyl, R3 is H or CH3, y is 0 to about 1, d is 0 to about 16, e is 0 to about 16, provided that (d+e) is from about 3 to about 16 is disclosed.Type: GrantFiled: November 2, 2005Date of Patent: June 30, 2009Assignee: E.I. du Pont de Nemours and CompanyInventors: Alexander Borisovich Shtarov, Michael Joseph Michalczyk, Charles Kenneth Taylor
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Patent number: 7351870Abstract: Various 13C and 14C carbon labeled compounds Rf—bCF(U)y(T)zFormula 1A or Rf—bCF2bCF(U)y(T)zFormula 1B wherein Rf is a linear or branched perfluoroalkyl radical Z(CmF2m)—, m is 1, 3 to 20, or a mixture thereof; Z is F when m is 1, and Z is F, Cl, or H when m is 3 to 20 or a mixture thereof; b is 13 or 14; y is 1, and z is 0 or 1; and when y and z are each 1, U is F, and T is selected from the group consisting of monovalent radicals —X wherein X is I or Br, —CH2—CH2—X, —CH?CH2, —CH2—CH2—OH, —CH2—COOH, —CH2OH, —bCH2OH, —COOH, —bCOOH, —O—CF(CF3)—C(O)F, —O—CF(CF3)—X, —SO2Y wherein Y is H, F or Cl, and —SO3H; and when y is 1, and z is 0, U is selected from the group consisting of divalent radicals ?CH—COOH, ?CH—CH2—OH, and ?O, are disclosed, and a process for their preparation which selectively introduces 13C and 14C carbon labels into a fluoroalkyl chain.Type: GrantFiled: March 5, 2004Date of Patent: April 1, 2008Assignee: E.I. du Pont de Nemours and CompanyInventors: Alexander Borisovich Shtarov, Jon Lee Howell