Patents by Inventor Jean M. J. Fréchet
Jean M. J. Fréchet 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: 20020159965Abstract: Cosmetic or personal care compositions, such as for styling hair, comprise a thermoplastic elastomer which is a block copolymer comprising a core polymer having a backbone comprising at least a proportion of C—C bonds and two or more flanking polymers. Each flanking polymer is covalently bound to an end of the core polymer and the copolymer is soluble at a level of at least 1% by weight in water at 25° C. The compositions comprise a cosmetically acceptable diluent or carrier.Type: ApplicationFiled: October 3, 2001Publication date: October 31, 2002Applicant: Unilever Home & Personal Care USA, Division of Conopco Inc.Inventors: Jean M.J. Frechet, Damian Hajduk, Ezat Khoshdel, Mingjun Liu, Ralph B. Nielsen, Euan Stuart Reid, Keith Leslie Rutherford
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Patent number: 6426313Abstract: The described invention provides a low fouling, high particle density polymerization process and an olefin polymerization cocatalyst activator composition comprising a cross-linked polymer bead having a surface area of from about 1 to 20 m2/g to which are bound a plurality of non-coordinating anions, where the polymeric support comprises ligands covalently bound to the central metal or metalloid atoms of said anions, and an effective number of cationic species to achieve a balanced charge. The invention also provides an olefin polymerization catalyst compositions comprising the reaction product of a) the foregoing cocatalyst activator, and b) an organometallic transition metal compound having ancillary ligands, at least one labile ligand capable of abstraction by protonation and at least one labile ligand into which an olefinic monomer can insert for polymerization.Type: GrantFiled: March 26, 1999Date of Patent: July 30, 2002Assignee: Exxon Mobil Chemical Patents Inc.Inventors: John F. Walzer, Jr., Anthony J. Dias, Jean M J Frechet, Stephen B. Roscoe
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Patent number: 6406632Abstract: Rapid characterization and screening of polymer samples to determine average molecular weight, molecular weight distribution and other properties is disclosed. Rapid flow characterization systems and methods, including liquid chromatography and flow-injection analysis systems and methods are preferably employed. High throughput, automated sampling systems and methods, high-temperature characterization systems and methods, and rapid, indirect calibration compositions and methods are also disclosed. The described methods, systems, and devices have primary applications in combinatorial polymer research and in industrial process control.Type: GrantFiled: November 8, 2000Date of Patent: June 18, 2002Assignee: Symyx Technologies, Inc.Inventors: Adam Safir, Miroslav Petro, Ralph B. Nielsen, Thomas S. Lee, Jean M. J. Fréchet
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Publication number: 20020010079Abstract: The described invention provides a low fouling, high particle density polymerization process and an olefin polymerization cocatalyst activator composition comprising a cross-linked polymer bead having a surface area of from about 1 to 20 m2/g to which are bound a plurality of non-coordinating anions, where the polymeric support comprises ligands covalently bound to the central metal or metalloid atoms of said anions, and an effective number of cationic species to achieve a balanced charge. The invention also provides an olefin polymerization catalyst compositions comprising the reaction product of a) the foregoing cocatalyst activator, and b) an organometallic transition metal compound having ancillary ligands, at least one labile ligand capable of abstraction by protonation and at least one labile ligand into which an olefinic monomer can insert for polymerization.Type: ApplicationFiled: March 26, 1999Publication date: January 24, 2002Inventors: JOHN F. WALZER, ANTHONY J. DIAS, JEAN M. J. FRECHET, STEPHEN B. ROSCOE
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Publication number: 20010027949Abstract: Rapid characterization and screening of polymer samples to determine average molecular weight, molecular weight distribution and other properties is disclosed. Rapid flow characterization systems and methods, including liquid chromatography and flow-injection analysis systems and methods are preferably employed. High throughput, automated sampling systems and methods, high-temperature characterization systems and methods, and rapid, indirect calibration compositions and methods are also disclosed. The described methods, systems, and devices have primary applications in combinatorial polymer research and in industrial process control.Type: ApplicationFiled: February 6, 2001Publication date: October 11, 2001Inventors: Adam Safir, Miroslav Petro, Ralph B. Nielsen, Thomas S. Lee, Jean M. J. Frechet
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Patent number: 6300424Abstract: Hyperbranched polyester and polyamide polymers are prepared by a one-step process of polymerizing a monomer of the formula A—R—B2 so that high molecular weight globular polymers having a multiplicity of a particular functional group on the outside surface are obtained.Type: GrantFiled: July 19, 1993Date of Patent: October 9, 2001Assignee: Cornell Research Foundation, Inc.Inventors: Jean M. J. Frechet, Craig J. Hawker, Kathryn Uhrich
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Publication number: 20010007897Abstract: Polyisobutylene (PIB) functionalized with terminal reactive unsaturation is disclosed. Carbocationically polymerized monohalogen-terminated PIB is dehydrohalogenated in a hydrocarbon solvent using an alkoxide of the formula RO-M wherein R is alkyl of at least 5 carbon atoms and M is alkali metal. The PIB obtained has terminal unsaturation which is 100% in the reactive ‘exo’ form which can be converted to succinic anhydride groups (PIB-SA) by the ene reaction with maleic anhydride. The PIB-SA is reactive with amine functional dendrimers to obtain a star-branched polymer having a dendrimer core and PIB branches joined by succinimide linkages. Blends of the star-branched polymer with polypropylene have improved energy absorption properties and controllable moisture/oxygen permeabilities useful in films.Type: ApplicationFiled: February 6, 2001Publication date: July 12, 2001Inventors: Pawan Kumar Agarwal, Hsien-Chang Wang, Yu Feng Wang, Jean M.J. Frechet, Shah A. Haque
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Patent number: 6228978Abstract: Polyisobutylene (PIB) functionalized with terminal reactive unsaturation is disclosed. Carbocationically polymerized monohalogen-terminated PIB is dehydrohalogenated in a hydrocarbon solvent using an alkoxide of the formula RO-M wherein R is alkyl of at least 5 carbon atoms and M is alkali metal. The PIB obtained has terminal unsaturation which is 100% in the reactive ‘exo’ form which can be converted to succinic anhydride groups (PIB-SA) by the ene reaction with maleic anhydride. The PIB-SA is reactive with amine functional dendrimers to obtain a star-branched polymer having a dendrimer core and PIB branches joined by succininide linkages. Blends of the star-branched polymer with polypropylene have improved energy absorption properties and controllable moisture/oxygen permeabilities useful in films.Type: GrantFiled: June 19, 1998Date of Patent: May 8, 2001Assignee: Exxon Mobil Chemical Patents IncInventors: Pawan Kumar Agarwal, Hsien-Chang Wang, Yu Feng Wang, Jean M. J. Frechet, Shah A. Haque
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Patent number: 6100214Abstract: The described invention provides a low fouling, high particle density polymerization process and an olefin polymerization catalyst composition comprising the reaction product of a) an organic polymeric support i) having a surface area of from about 1 to 10 m.sup.2 /g and ii) functionalized with an acidic proton-containing ammonium salt of a non-coordinating anion, and b) an organometallic transition metal compound having ancillary ligands, at least one labile ligand capable of abstraction by protonation by said ammonium salt and at least one labile ligand into which an olefinic monomer can insert for polymerization. In a preferred embodiment, the polymeric support has a surface area of .ltoreq.10 m.sup.2 /g and is particularly suitable for use with high activity organometallic, transition metal catalyst compounds.Type: GrantFiled: June 5, 1998Date of Patent: August 8, 2000Assignee: Exxon Chemical Patents Inc.Inventors: John F. Walzer, Jr., Anthony J. Dias, Jean M J Frechet, Stephen B. Roscoe
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Patent number: 6013413Abstract: Alicyclic nortricyclene polymers and co-polymers suitable for deep ultraviolet microlithography applications.Type: GrantFiled: February 25, 1998Date of Patent: January 11, 2000Assignee: Cornell Research Foundation, Inc.Inventors: Jean M. J. Frechet, Quingshan Niu
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Patent number: 6011120Abstract: There is provided a method of introducing ethylenically unsaturated functionality, into an alkylstyrene homopolymer or copolymer with an isoolefin, at the alkylbenzyl carbon atom comprising the steps of: forming a solution of the polymer in a hydrocarbon solvent; adding to the polymer solution an alkali metal (Na, K, Rb, Cs) alkoxide and an alkyl lithium compound to form a solution of a metalated intermediate; and adding a halodialkylalkenyl silane to the metalated polymer solution. Also provided are the ethylenically unsaturated functionalized polymer derivatives made by the method, and the crosslinked derivatives thereof.Type: GrantFiled: December 23, 1996Date of Patent: January 4, 2000Assignee: Exxon Chemical Patents, Inc.Inventors: Jean M. J. Frechet, Shah A. Haque, Hsien-Chang Wang
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Patent number: 5929214Abstract: Porous polymer monoliths are made thermally responsive by functionalizing/grafting the pores with thermally responsive polymers and copolymers. Depending on the reaction conditions employed, the grafted polymer can either completely block flow through micrometer-sized pores in the monoliths or control the flow rate through the monoliths. The grafted monoliths are useful as thermal gates, thermal valves, and for isocratic hydrophobic interaction chromatography of proteins.Type: GrantFiled: February 25, 1998Date of Patent: July 27, 1999Assignee: Cornell Research Foundation, Inc.Inventors: Eric C. Peters, Frantisek Svec, Jean M.J. Frechet
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Patent number: 5849828Abstract: There is provided a method of introducing functionality into a copolymer of an isoolefin and an alkylstyrene at the alkylbenzyl carbon atom comprising the steps of: forming a solution of said copolymer in a hydrocarbon solvent; adding to said polymer solution an alkali metal Cs, K, Na alkoxide and an alkyl lithium compound to form a superbase with the polymer solution; and adding an electrophile to said base polymer solution also provided are the metalated copolymers and the functionalized derivative therefrom.Type: GrantFiled: June 5, 1997Date of Patent: December 15, 1998Assignees: Exxon Chemical Patents Inc, Cornell Research Foundation, IncInventors: Jean M. J. Frechet, Shah A. Haque, Joachim Hans Georg Steinke, Hsien-Chang Wang
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Patent number: 5840810Abstract: There is provided a method of introducing functionality into a copolymer of an isoolefin and an alkylstyrene at the alkylbenzyl carbon atom comprising the steps of: forming a solution of said copolymer in a hydrocarbon solvent; adding to said polymer solution an alkali metal Na, K, Rb, Cs alkoxide and an alkyl lithium compound to form a superbase with the polymer solution; and adding an electrophile to the metalated polymer solution; also provided are the metalated copolymers and the functionalized derivatives therefrom.Type: GrantFiled: June 6, 1996Date of Patent: November 24, 1998Assignees: Exxon Chemical Patents Inc, Cornell Research Foundation Inc.Inventors: Jean M. J. Frechet, Shah A. Haque, Joachim H. G. Steinke, Hsien-Chang Wang
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Patent number: 5821308Abstract: There is provided a method of introducing functionality into a copolymer of an isoolefin and an alkylstyrene at the alkylbenzyl carbon atom comprising the steps of: forming a solution of said copolymer in a hydrocarbon solvent; adding to said polymer solution an alkali metal Cs, K, Na alkoxide and an alkyl lithium compound to form a superbase with the polymer solution; and adding an electrophile to said base polymer solution also provided are the metalated copolymers and the functionalized derivative therefrom.Type: GrantFiled: June 5, 1997Date of Patent: October 13, 1998Assignees: Exxon Chemical Patents Inc, Cornell Research FoundationInventors: Jean M. J. Frechet, Shah A. Haque, Joachim Hans Georg Steinke, Hsien-Chang Wang
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Patent number: 5814707Abstract: This invention provides a method by which an alkylstyrene containing polymer may be exclusively functionalized at the primary benzylic carbon site of the styrenic monomer. The process of this invention comprises the treatment of an alkylstyrene containing polymer dissolved in a non-polar liquid medium with an organic hydroperoxide oxidizing reagent in the presence of a catalytically sufficient amount of a chromium compound, to oxidize a portion of the aromatic alkyl groups of the polymer to an oxygen containing functional group.Type: GrantFiled: June 4, 1997Date of Patent: September 29, 1998Assignee: Exxon Chemical Patents Inc.Inventors: Jean M.J. Frechet, Shah A. Haque, Hsien-Chang Wang
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Patent number: 5814708Abstract: This invention provides a method by which an alkylstyrene containing polymer may be exclusively functionalized at the primary benzylic carbon site of the styrenic monomer. The process of this invention comprises the treatment of an alkylstyrene containing polymer dissolved in a non-polar liquid medium with an organic hydroperoxide oxidizing reagent in the presence of a catalytically sufficient amount of a chromium compound, to oxidize a portion of the aromatic alkyl groups of the polymer to an oxygen containing functional group.Type: GrantFiled: June 4, 1997Date of Patent: September 29, 1998Assignee: Exxon Chemical Patents Inc.Inventors: Jean M.J. Frechet, Shah A. Haque, Hsien-Chang Wang
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Patent number: 5807931Abstract: This invention provides a method by which an alkylstyrene containing polymer may be exclusively functionalized at the primary benzylic carbon site of the styrenic monomer. The process of this invention comprises the treatment of an alkylstyrene containing polymer dissolved in a non-polar liquid medium with an organic hydroperoxide oxidizing reagent in the presence of a catalytically sufficient amount of a chromium compound, to oxidize a portion of the aromatic alkyl groups of the polymer to an oxygen containing functional group.Type: GrantFiled: June 4, 1997Date of Patent: September 15, 1998Assignee: Exxon Chemical Patents Inc.Inventors: Jean M. J. Frechet, Shah A. Haque, Hsien-Chang Wang
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Patent number: 5679748Abstract: This invention provides a method by which an alkylstyrene containing polymer may be exclusively functionalized at the primary benzylic carbon site of the styrenic monomer. The process of this invention comprises the treatment of an alkylstyrene containing polymer dissolved in a non-polar liquid medium with an organic hydroperoxide oxidizing reagent in the presence of a catalytically sufficient amount of a chromium compound, to oxidize a portion of the aromatic alkyl groups of the polymer to an oxygen containing functional group.Type: GrantFiled: April 5, 1996Date of Patent: October 21, 1997Assignee: Exxon Chemical Patents Inc.Inventors: Jean M. J. Frechet, Shah A. Haque, Hsien-Chang Wang
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Patent number: 5670581Abstract: There is provided a method of introducing functionality into a copolymer of an isoolefin and an alkylstyrene at the alkylbenzyl carbon atom comprising the steps of: forming a solution of said copolymer in a hydrocarbon solvent; adding to said polymer solution an alkali metal Cs, K, Na alkoxide and an alkyl lithium compound to form a superbase with the polymer solution; and adding an electrophile to said base polymer solution also provided are the metalated copolymers and the functionalized derivative therefrom.Type: GrantFiled: June 7, 1995Date of Patent: September 23, 1997Assignees: Exxon Chemical Patents Inc., Cornell Research Foundation, Inc.Inventors: Jean M. J. Frechet, Shah A. Haque, Joachim Hans Georg Steinke, Hsien-Chang Wang