Patents Assigned to Ausimont S.p.A.
  • Fluoroelastomer compositions
    Patent number: 6310142
    Abstract: Fluoropolymers comprising a fluoroelastomer matrix incorporating therein particles of a semicrystalline fluoropolymer containing iodine and/or bromine and formed of tetrafluoroethylene (TFE) homopolymers or copolymers wherein the average particle sizes of the semicrystalline fluoropolymer latex range from 10 to 100 nm.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: October 30, 2001
    Assignee: Ausimont S.P.A.
    Inventors: Marco Apostolo, Margherita Albano, Anna Staccione
  • Process for preparing 1,1,1-trifluoro-2-chloroethane
    Patent number: 6307114
    Abstract: In the preparation of 1,1,1-trifluoro-2-chloroethane (HCFC 133a) by means of hydrofluorination in the gas phase of trichloroethylene (TCE) in the presence of a carried catalyst based on Cr2O3 it is possible to prolong the catalyst life by feeding to the hydrofluorination reactor, along with trichloroethylene, little amounts (7-25 mols % calculated on the mixture with trichloroethylene) of 133a.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: October 23, 2001
    Assignee: Ausimont S.p.A.
    Inventor: Paolo Cuzzato
  • Process for preparing HCFC-123
    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
  • Catalyst for the fluorination of halogenated organic compounds
    Patent number: 6300530
    Abstract: Catalyst comprising a supported Cr(III) amorphous compound, characterized in that the support is formed by an aluminum trifluoride (AlF3) having an high surface area obtainable by alumina fluorination with gaseous HF at an initial temperature lower than 300° C., the temperature is rised with a temperature gradient≦100° C./hour up to the final temperature>320° C. and <450° C., the fluorination is continued at the final temperature until feeding a HF molar amount at least equal to the stoichiometric with respect to the alumina, the fluorination being carried out until a fluorinated alumina with a fluorine content not lower than 95% of the stoichiometric is obtained.
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: October 9, 2001
    Assignee: Ausimont S.p.A.
    Inventor: Paolo Cuzzato
  • Thermoplastic fluoropolymers
    Publication number: 20010027236
    Abstract: Polymer composition comprising (A) (co)polymers based on chlorotrifluoroethylene (PCTFE) and (B) copolymers based on ethylene/chlorotrifluoroethylene (ECTFE) and/or ethylene/tetrafluoroethylene (ETFE).
    Type: Application
    Filed: February 13, 2001
    Publication date: October 4, 2001
    Applicant: Ausimont S.p.A.
    Inventors: Julio A. Abusleme, Claudia Manzoni
  • Use of fluorinated compounds to confer release properties
    Publication number: 20010026843
    Abstract: Use of fluorinated compounds to confer release properties to cellulosic substrata, selected from the following structures:
    Type: Application
    Filed: February 28, 2001
    Publication date: October 4, 2001
    Applicant: Ausimont S.p.A.
    Inventors: Gabriella Carignano, Mattia De Dominicis
  • TFE polymerization process
    Patent number: 6297334
    Abstract: Process for the preparation of tetrafluoroethylene (TFE) polymer-based dispersions having diameter average sizes in the range 0.005-0.06 &mgr;m, which comprises: a) preparation of an aqueous perfluoropolyether (PFPE) microemulsion; b) microemulsion feeding into the polymerization reactor, in such amounts so that the microemulsion perfluoropolyetheral oil phase is present in a concentration higher than 2 ml for liter of reaction medium; c) reaction medium feeding in the gaseous TFE polymerization reactor, optional addition of surfactants, stabilizers, comonomers, transfer agents; d) addition of the initiator, stabilizers, comonomers and transfer agents; e) discharge from the reactor of the polymeric latex.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: October 2, 2001
    Assignee: Ausimont S.p.A.
    Inventors: Enrico Marchese, Valery Kapeliouchko, Pasqua Colaianna
  • Use of (per) fluoropolyether compounds as additives in formulations
    Publication number: 20010024695
    Abstract: Use of mono- and bifunctional (per)fluoropolyether compounds as additives in formulations for the wood treatment, said (p-er)fluoropolyether compounds having the structures:
    Type: Application
    Filed: February 28, 2001
    Publication date: September 27, 2001
    Applicant: Ausimont S.p.A.
    Inventors: Gabriella Carignano, Mattia De Dominicis
  • Use of mono- and bifunctional (per) fluoropolyether derivatives in the treatment of ceramic materials
    Publication number: 20010025095
    Abstract: Use in the treatment of ceramic materials for obtaining an easy stain removal, of mono- and bifunctional (per)fluoropolyether derivatives having the following structures:
    Type: Application
    Filed: February 28, 2001
    Publication date: September 27, 2001
    Applicant: Ausimont S.p.A.
    Inventors: Mattia De Dominicis, Gabriella Carignano
  • Thermoplastic fluorinated polymers
    Publication number: 20010023283
    Abstract: A composition comprising a polymer mixture A of polymers formed by:
    Type: Application
    Filed: February 13, 2001
    Publication date: September 20, 2001
    Applicant: Ausimont S.p.A.
    Inventors: Julio A. Abusleme, Claudia Manzoni
  • Process for the preparation of aqueous dispersions of fluoropolymers
    Publication number: 20010020063
    Abstract: Process for the preparation of a dispersion based on homopolymers/copolymers of tetrafluoroethylene (TFE), said dispersion having a bimodal or multimodal distribution of the particle diameters, wherein the fraction of small particles is in the range 1.5-359 by weight calculated on the dry product; the ratio between the average diameter of the small particles with respect to the average diameter of the dispersion obtained from the polymerization being in the range 0.02-0.
    Type: Application
    Filed: February 22, 2001
    Publication date: September 6, 2001
    Applicant: Ausimont S.p.A.
    Inventors: Valery Kapeliouchko, Enrico Marchese
  • Fluoropolymer dispersions
    Patent number: 6277906
    Abstract: Fluoropolymer aqueous dispersions comprising an hydrogenated nonionic surfactant and a fluorinated nonionic surfactant selected from the following classes: Rf—L—(OCH(R1)—CH(R2) )n—O—A  (I) wherein: n is an integer comprised between 4 and 60; L is selected from: —(CF(Y)—CO—O)pR′—; —(CF(Y)—CO—NH)pR′—; —(CF(Y)—SO2—NH)pR′—; wherein: p is 0 or 1; Y can be F or CF3; R′ is an alkylic radical C1-C5; R1, R2 can preferably be both H or the former H and the latter CH3, Rf can be a radical of (per)fluoroalkane type from 4 to 20 C atoms or of (per)fluoropolyether type; A is selected from the following ones: —H; —CH, —CH2OH; —CH2OCH2CH2OH; —CH2(OCH2CH2)n′″OR′ wherein n′″ is an integer between 2 and 15 and R′ is H, CH3, COCH3; —CONHCH2CH2OH.
    Type: Grant
    Filed: November 6, 2000
    Date of Patent: August 21, 2001
    Assignee: Ausimont S.p.A
    Inventors: Valerio Biancardi, Enrico Marchese, Fabio Polastri
  • De-oiling composition of perfluoropolyethers and hydrofluoropolyethreal surfactants
    Patent number: 6262006
    Abstract: Compositions utilized to remove traces of organic solvents and/or oils from the surfaces of components comprising: i) perfluoropolyethers; ii) fluorinated additive having a structure selected from the following: T—ORf(CFY)—L  (I) L—CF2ORfCF2—L  (II)65 with L=X—CH2CH2(OCH2CH2)nB wherein X=CH2O, CH2NR″, CONR″, CH2OCH2CH2NR″, CH2OCOCH2O; B=OH, SH, NHR″, OCH3, OCOCH3; with R″=H, alkyl C1-3; Y=CF3 or F; T is selected among —CF3, —C2F5, —C3F7, ClCF2CF(CF3)—, CF3CFClCF2—, ClCF2CF2—, ClCF2—; Rf is a perfluoropolyether chain.
    Type: Grant
    Filed: February 18, 1998
    Date of Patent: July 17, 2001
    Assignee: Ausimont S.p.A.
    Inventors: Rossella Silvani, Simonetta Fontana
  • Process for preparing modified PTFE
    Patent number: 6262209
    Abstract: Method for preparing modified PTFE by suspension, wherein as comonomers perfluoroalkylvinylethers in which the alkyl has from 1 to 5 carbon atoms, and/or a perfluorodioxole are used, characterized by the following conditions: a part of the comonomer, from 15 to 90% by weight of the total amount is to be fed at the beginning of the reaction; the remaining part of the comonomer is to be distributed during the reaction so as to obtain a constant speed of the comonomer incorporation in the polymer chain; a perfluorinated surfactant and a buffering salt are used; a persulphate with a reducing agent is used as initiator in such a ratio as to generate a part of the radicals from the redox reaction and another one from the persulphate thermal decomposition; one operates with a polymerization pressure from 15 to 30 bar.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: July 17, 2001
    Assignee: Ausimont S.p.A.
    Inventors: Valery Kapeliouchko, Enrico Marchese
  • Process for the preparation of perfluoropolyoxyalkylenes with hydroxyl end groups
    Publication number: 20010007046
    Abstract: A process for preparing perfluoropolyoxyalkylenes with hydroxyl end groups having structure:
    Type: Application
    Filed: December 29, 2000
    Publication date: July 5, 2001
    Applicant: Ausimont S.p.A.
    Inventors: Claudio Tonelli, Antonio Russo, Ezio Strepparola
  • Hydrofluoropolyether-based azeotropic or near azeotropic compositions
    Patent number: 6255273
    Abstract: Azeotropic or near azeotropic compositions based on difluoromethoxy-bis(difluoromethyl ether) and/or 1-difluoromethoxy-1,1,2,2-tetrafluoroethyl difluoromethyl ether.
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: July 3, 2001
    Assignee: Ausimont S.p.A.
    Inventors: Ezio Musso, Giampiero Basile, Sauro Girolomoni
  • Coating for coils
    Patent number: 6242557
    Abstract: Use of crosslinked polymers for coil coating based on perfluoropolyethereal polymers, comprising as repeating units sequences of one or more oxyfluoroalkylenic units such as —CF2CF2O—, —CR4R5CF2CF2O— wherein R4 and R5 equal to or different from each other are chosen among H, Cl, F or perfluoroalkyl from 1 to 4 carbon atoms, —CF2CF(CF3)O—, —CFYO—, wherein Y is equal to F or CF3, having hydroxylic bifunctional termination, crosslinking being carried out with blocked polyisocyanates having at least 3 NCO groups.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: June 5, 2001
    Assignee: Ausimont S.p.A.
    Inventors: Tatiana Temtchenko, Massimo Malavasi
  • Process for preparing pentafluoroethane
    Patent number: 6232514
    Abstract: Process for preparing pentafluoroethane (HFC-125) wherein 1,1,1-trifluorodichloroethane (HFC-123) is reacted with HF at a temperature from 310° to 380° C., in the presence of a catalyst comprising Cr2O3 supported on preformed AlF3. HFC-125 is obtained with high yields (up to 60-70% and over), high conversions (over 80%) and high selectivity, i.e. formation of by-product in very low amounts (5% by moles at most) Moreover, the catalyst maintains a high activity for a long time also with high organic charges.
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: May 15, 2001
    Assignee: Ausimont S.p.A.
    Inventors: Paolo Cuzzato, Antonio Masiero, Francesco Rinaldi
  • Compositions based on elastomeric polymers of vinylidene fluoride, hexafluoropropene and optionally tetrafluoroethylene, suitable for providing microcellular foamed articles
    Patent number: 6232357
    Abstract: The present invention relates to compositions based on elastomeric polymers of vinylidene fluoride, hexafluoropropene and optionally tetrafluoroethylene suitable for providing microcellular foamed vulcanized articles by extrusion or compression molding. In the case of the production of extruded articles based on vinylidene fluoride and hexafluoropropene copolymers, the compositions comprise: the copolymer, bisphenol AF, a quaternary phosphonium or aminophosphonium salt, azodicarbonamide, MgO, Ca(OH)2, zinc stearate and a plasticizer, each of the components being contained in an exactly defined proportion.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: May 15, 2001
    Assignee: Ausimont S.p.A.
    Inventors: Franco Barbieri, Raffaele Ferro, Giuseppe Fiorillo
  • Surface treatments with bifunctional perfluoropolyether derivatives
    Patent number: 6221434
    Abstract: A surface treatment method for imparting -oil- and/or water-repellency, comprising the step of applying to the surface to be treated compositions comprising at least one compound having the formula III ACF2O—(CF2O)n(C2F4O)m—CF2—B  III where n=1-20, m=1-20 and A and B are reactive functional groups chosen independently from the group constituted by: a) CONHR, where R=CnH2n+1 with n=1-30, b) CH2OH, c) CONH(X)SiR1n(OR′)3−n, where n=0-2, R1 and R′, identical or different, are CrH2r+1 alkyl radicals, where r=1-4, and X is a bifunctional alkyl spacer of the (CHR″)m type, where m=1-20, and R″ can be H or CH3, optionally containing heteroatoms, d) —[CH2O(R′″O)p]k—P(O)(OH)3−k, where R′″ is an alkylene radical, for example C2H4 or C3H6, p=1-10 and k=1, 2, the composition comprising the compound at a suitable concentration and being a
    Type: Grant
    Filed: November 29, 1999
    Date of Patent: April 24, 2001
    Assignee: Ausimont S.p.A.
    Inventors: Mario Visca, Silvana Modena, Simonetta Fontana, Giovanni Gavazzi