Patents by Inventor Letanzio Bragante

Letanzio Bragante 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).

  • Patent number: 10533071
    Abstract: Disclosed are mixtures containing: mono- and bi-functional polymers [polymers (P-A) and (P—B)] comprising a plurality of (per)fluoropolyether segments [segments (SRF)] joined together by hydrogenated (poly)ether segments [segments (SH)], said polymers having two ends, wherein one or both ends comprises a hydroxy or a leaving group; a non-functional polymer comprising a plurality of (per)fluoropolyether segments (SRF) joined together by hydrogenated (poly)ether segments (SH), with the proviso that the hydrogenated (poly)ether segments (SH) are not segments of formula —CH2OCH2OCH2—. Disclosed are also monofunctional polymers (P-A) that can be isolated from such mixtures. Methods for the obtainment of the mixtures and for separating the polymers therein contained are also provided, as well as methods of using the mixtures or each polymer therein contained as intermediates or building blocks for the synthesis of other polymers or as ingredients of compositions.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: January 14, 2020
    Assignee: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
    Inventors: Claudio Adolfo Pietro Tonelli, Ivan Wlassics, Giuseppe Marchionni, Letanzio Bragante
  • Patent number: 10246572
    Abstract: The invention pertains to foamable thermoplastic fluoropolymer composition comprising: at least one fluoropolymer [polymer (A)]; and at least one perfluoroalkoxysulphonic derivative of either of formulae: (Xn+)1/n?O3S—CF2CF2O—Rdf—OCF2CF2—SO3?(Xn+)1/n and Rmf—OCF2CF2—SO3?(Xn+)1/n wherein Rdf is a divalent C1-C12 perfluorocarbon group, possibly comprising one or more ethereal oxygen atom; Rmf is a monovalent C1-C12 perfluorocarbon group, possibly comprising one or more ethereal oxygen atom, optionally comprising heteroatoms, generally selected from S, N, P; X=H, a metal cation, or an ammonium group; n is the valence of the cation X, preferably 1 or 2.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: April 2, 2019
    Assignee: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
    Inventors: Pasqua Colaianna, Giambattista Besana, Emanuele Di Nicolo, Letanzio Bragante, Giuseppe Marchionni, Giulio Brinati
  • Publication number: 20190062496
    Abstract: A method for the manufacture of fluorinated polymers and polymers obtainable therefrom are herein disclosed. The method envisages the reaction of a) first reagent [reagent (R1)] which is an alcohol selected from a (per)fluoropolyether (PFPE) alcohol a fluoroalkylene diol and a mixture thereof; b) a second reagent [reagent (R2)] which is a sulfonic ester of a PFPE, a sulfonic diester of a fluoroalkylene diol or a mixture thereof and, optionally, c) a third reagent which is a mono-functional (per)haloalkyl alcohol or a sulfonic ester thereof in the presence of an organic or inorganic base. At least reagent (R1) is a PFPE alcohol (A) or at least reagent (R2) is a PFPE sulfonic ester (B) and the overall equivalents of alcohols are the same as the overall equivalents of sulfonic esters. The method allows to obtain in a convenient way non-functional polymers comprising at least a PFPE segment and having high molecular weight.
    Type: Application
    Filed: February 20, 2017
    Publication date: February 28, 2019
    Applicant: Solvay Specialty Polymers Italy S.p.A.
    Inventors: Claudio Adolfo Pietro TONELLI, Ivan Diego WLASSICS, Stefano MILLEFANTI, Letanzio BRAGANTE, Solange BARBIERI, Giuseppe MARCHIONNI
  • Patent number: 10179836
    Abstract: A polymer [polymer (P)] comprising a plurality of (per)fluoropolyether (PFPE) segments [segments (SRF)] joined together by hydrogenated (poly)ether segments [segments (SH)], said polymers (P) having two end groups [groups (E)], each group (E) comprising a hydroxy or a leaving group, with the proviso that the hydrogenated (poly)ether segment (SH) is not a segment of formula —CH2OCH2 OCH2— is herein disclosed. Disclosed is also a method for the manufacture of polymer (P) and a polymer obtainable by full or partial fluorination of polymer (P). Polymer (P) and polymers obtainable therefrom by full or partial fluorination can be conveniently used in the manufacture of lubricant compositions or of compositions for imparting hydro-/oleo-repellence to substrates. Said polymers can also be used as intermediates for the manufacture of other polymers or block copolymers.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: January 15, 2019
    Assignee: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
    Inventors: Claudio Adolfo Pietro Tonelli, Solange Barbieri, Ivan Wlassics, Letanzio Bragante, Giuseppe Marchionni
  • Patent number: 10011545
    Abstract: The invention relates to a process for the manufacture of a-iodoperfluoroalkanes and ?,?-diiodoperfluoroalkanes of general formula: (1) A(C2F4)n1, wherein: A is selected from F, CF3 and I and n is an integer equal to or higher than 1, with the proviso that, when A is F, n is an integer higher than 1 said process comprising heating a mixture [mixture (M1)] containing: —a compound selected from I2, CF3I, CF3CF2I and C2F4I2; —TFE; —and CO2 at definite temperatures and concentrations of CO2.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: July 3, 2018
    Assignee: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
    Inventors: Emanuela Antenucci, Letanzio Bragante, Marco Galimberti, Vito Tortelli
  • Publication number: 20170369645
    Abstract: A polymer [polymer (P)] comprising a plurality of (per)fluoropolyether (PFPE) segments [segments (SRF)] joined together by hydrogenated (poly)ether segments [segments (SH)], said polymers (P) having two end groups [groups (E)], each group (E) comprising a hydroxy or a leaving group, with the proviso that the hydrogenated (polytether segment (SH) is not a segment of formula —CH2OCH2 2 OCH2— is herein disclosed. Disclosed is also a method for the manufacture of polymer (P) and a polymer obtainable by full or partial fluorination of polymer (P). Polymer (P) and polymers obtainable therefrom by full or partial fluorination can be conveniently used in the manufacture of lubricant compositions or of compositions for imparting hydro-/oleo-repellence to substrates. Said polymers can also be used as intermediates for the manufacture of other polymers or block copolymers.
    Type: Application
    Filed: November 23, 2015
    Publication date: December 28, 2017
    Inventors: Claudio Adolfo Pietro TONELLI, Solange BARBIERI, Ivan WLASSICS, Letanzio BRAGANTE, Giuseppe MARCHIONNI
  • Publication number: 20170327641
    Abstract: Disclosed are mixtures containing: mono- and bi-functional polymers [polymers (P-A) and (P-B)] comprising a plurality of (per)fluoropolyether segments [segments (SRF)] joined together by hydrogenated (poly)ether segments [segments (SH)], said polymers having two ends, wherein one or both ends comprises a hydroxy or a leaving group; a non-functional polymer comprising a plurality of (per)fluoropolyether segments (S) joined together by hydrogenated (poly)ether segments (SB), with the proviso that the hydrogenated (poly)ether segments (SRF) are not segments of formula —CH2OCH2OCH2—. Disclosed are also monofunctional polymers (P-A) that can be isolated from such mixtures. Methods for the obtainment of the mixtures and for separating the polymers therein contained are also provided, as well as methods of using the mixtures or each polymer therein contained as intermediates or building blocks for the synthesis of other polymers or as ingredients of compositions.
    Type: Application
    Filed: November 23, 2015
    Publication date: November 16, 2017
    Inventors: Claudio Adolfo Pietro TONELLI, Ivan WLASSICS, Giuseppe MARCHIONNI, Letanzio BRAGANTE
  • Publication number: 20170029349
    Abstract: The invention relates to a process for the manufacture of a-iodoperfluoroalkanes and ?,?-diiodoperfluoroalkanes of general formula: (1) A(C2F4)n1, wherein: A is selected from F, CF3 and I and n is an integer equal to or higher than 1, with the proviso that, when A is F, n is an integer higher than 1 said process comprising heating a mixture [mixture (M1)] containing: —a compound selected from I2, CF3I, CF3CF2I and C2F4I2; —TFE; —and CO2 at definite temperatures and concentrations of CO2.
    Type: Application
    Filed: April 9, 2015
    Publication date: February 2, 2017
    Inventors: Emanuela ANTENUCCI, Letanzio BRAGANTE, Marco GALIMBERTI, Vito TORTELLI
  • Publication number: 20130267618
    Abstract: The invention pertains to foamable thermoplastic fluoropolymer composition comprising: at least one fluoropolymer [polymer (A)]; and at least one perfluoroalkoxysulphonic derivative of either of formulae: (Xn+)1/n?O3S—CF2CF2O—Rdf—OCF2CF2—SO3?(Xn+)1/n and Rmf—OCF2CF2—SO3?(Xn+)1/n wherein Rdf is a divalent C1-C12 perfluorocarbon group, possibly comprising one or more ethereal oxygen atom; Rmf is a monovalent C1-C12 perfluorocarbon group, possibly comprising one or more ethereal oxygen atom, optionally comprising heteroatoms, generally selected from S, N, P; X?H, a metal cation, or an ammonium group; n is the valence of the cation X, preferably 1 or 2.
    Type: Application
    Filed: December 9, 2011
    Publication date: October 10, 2013
    Applicant: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
    Inventors: Pasqua Colaianna, Giambattista Besana, Emanuele Di Nicolo, Letanzio Bragante, Giuseppe Marchionni, Giulio Brinati
  • Publication number: 20060189834
    Abstract: An activated AlF3 based catalyst is produced by treating a crude AlF3 for more than 5 hours with a gas stream at a temperature from 300° C. to 450° C.
    Type: Application
    Filed: July 27, 2004
    Publication date: August 24, 2006
    Applicant: Solvay Solexis S.P.A.
    Inventors: Paolo Cuzzato, Letanzio Bragante
  • Patent number: 6791001
    Abstract: A process in gaseous phase to obtain CFC 113a starting from CFC 113, wherein CFC 113, optionally diluted with a gas inert under the reaction conditions, is let flow on a catalyst formed by aluminum fluoride.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: September 14, 2004
    Assignee: Ausimont S.p.A.
    Inventors: Paolo Cuzzato, Letanzio Bragante
  • Publication number: 20040157946
    Abstract: Non azeotropic mixtures of fluids to obtain polymeric foams comprising:
    Type: Application
    Filed: February 5, 2004
    Publication date: August 12, 2004
    Applicant: SOLVAY SOLEXIS S.p.A.
    Inventors: Alberto Nicoletti, Letanzio Bragante
  • Publication number: 20020151755
    Abstract: A process in gaseous phase to obtain CFC 113a starting from CFC 113, wherein CFC 113, optionally diluted with a gas inert under the reaction conditions, is let flow on a catalyst formed by aluminum fluoride.
    Type: Application
    Filed: February 12, 2002
    Publication date: October 17, 2002
    Applicant: Ausimont S.p.A.
    Inventors: Paolo Cuzzato, Letanzio Bragante
  • Patent number: 6323379
    Abstract: A process for obtaining pentafluoroethane HFC 125 by dismutation of gaseous tetrafluorochloroethane HCFC 124, at temperatures in the range 200°-300° C., on a trivalent chromium oxide (Cr2O3) catalyst, supported on aluminum fluoride, by feeding HF in such amount that the HCFC 124/HF molar ratio is in the range 10/1-1/1.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: November 27, 2001
    Assignee: Ausimont S.p.A.
    Inventors: Paolo Cuzzato, Letanzio Bragante, Francesco Rinaldi
  • Publication number: 20010038819
    Abstract: Process for preparing aluminum fluoride having an high surface area and high pore volume comprising the fluorination with HF of alumina having surface area of at least 150 m2/g and pore volume not lower than 0.3 cc/g, said alumina comprising from about 0.5 up to about 15% by weight of silicon oxide.
    Type: Application
    Filed: December 21, 2000
    Publication date: November 8, 2001
    Inventors: Paolo Cuzzato, Letanzio Bragante, Francesco Rinaldi
  • Patent number: 6300529
    Abstract: Process for preparing HCFC-123 with a content of olefins lower than 10 ppm and very small amounts of HCFC-123a and 123b by dismutation of HCFC-124 in gaseous phase by contact with a catalyst which essentially consists of three valence chromium oxide supported on aluminum fluoride, at temperatures in the range 150°-260° C., and with contact times between 5-25 sec.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: October 9, 2001
    Assignee: Ausimont S.p.A.
    Inventors: Paolo Cuzzato, Francesco Rinaldi, Letanzio Bragante
  • Patent number: 6187975
    Abstract: Perfluoropropene (PFP) hydrofluorination process in gaseous phase to obtain CF3—CHF—CF3 (A-227ea), characterized in that as catalyst fluorinated alumina containing at least 90% by weight of AlF3, is used, the HF/PFP molar ratios range from about 4:1 to 20:1, the hydrofluorination process temperature being in the range 320°-420° C.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: February 13, 2001
    Assignee: Ausimont S.p.A.
    Inventors: Letanzio Bragante, Paolo Cuzzato
  • Patent number: 6187280
    Abstract: Process for preparing aluminum fluoride having an high surface area and high pore volume comprising the fluorination with HF of alumina having surface area of at least 150 m2/g and pore volume not lower than 0.3 cc/g, said alumina comprising from about 0.5 up to about 15% by weight of silicon oxide.
    Type: Grant
    Filed: May 20, 1998
    Date of Patent: February 13, 2001
    Assignee: Ausimont S.p.A.
    Inventors: Paolo Cuzzato, Letanzio Bragante, Francesco Rinaldi
  • Patent number: 6150572
    Abstract: Process for the regeneration of a fluorination catalyst based on Cr(III) compounds optionallay supported comprising a) the treatment at 350.degree. C.-400.degree. C. with an air/inert gas mixture and b) treatment at 300.degree. C.-380.degree. C. with a mixture of an inert gas containing from 1 to 10% by volume of hydrogen.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: November 21, 2000
    Assignee: Ausimont S.p.A.
    Inventors: Francesco Rinaldi, Paolo Cuzzato, Letanzio Bragante
  • Patent number: 5981813
    Abstract: Fluorination process of halogenated organic compounds with gaseous anhydrous HF characterized in that a catalyst comprising a supported Cr(III) amorphous compound is used, wherein the support consists in an aluminum trifluoride (AlF.sub.3) having an high surface area and an high pore volume obtainable by fluorination with gaseous HF of alumina having surface area of at least 150 m.sup.2 /g and pore volume not lower than 0.3 cc/g and wherein said alumina comprises from 0.5 up to 15% by weight of silicon oxide, the chromium amount being comprised between 1 and 20% by weight.
    Type: Grant
    Filed: May 20, 1997
    Date of Patent: November 9, 1999
    Assignee: Ausimont S.p.A.
    Inventors: Paolo Cuzzato, Letanzio Bragante, Francesco Rinaldi