Patents Assigned to Ausimont S.p.A.
  • Aqueous dispersions of fluoropolymers
    Publication number: 20020132895
    Abstract: Aqueous dispersions of fluoropolymers containing as stabilizer from 1 to 30% by weight with respect to the fluoropolymer, of a non ionic surfactant having the following structure:
    Type: Application
    Filed: January 17, 2002
    Publication date: September 19, 2002
    Applicant: Ausimont S.p.A.
    Inventors: Tiziana Poggio, Enrico Marchese
  • Perfluoropolyether additives for electrochemical applications
    Publication number: 20020127475
    Abstract: Electrolytic compositions comprising a perfluoropolyether additive of formula (I): 1
    Type: Application
    Filed: December 28, 2001
    Publication date: September 12, 2002
    Applicant: Ausimont S.p.A.
    Inventors: Giuseppe Marchionni, Alberto Zompatori, Alba Chittofrati
  • Perfluorodiacylperoxides as polymerization initiators
    Publication number: 20020128411
    Abstract: Perfluorodiacylperoxides having the following structures: 1
    Type: Application
    Filed: March 4, 2002
    Publication date: September 12, 2002
    Applicant: Ausimont S.p.A.
    Inventors: Walter Navarrini, Marco Galimberti
  • Curable fluoroelastomer compositions
    Patent number: 6448319
    Abstract: Use in curable fluoroelastomer compositions of additives having polyacetal structure of general formula: HOCH2—[Rf—CH2O(CH2O)cCH2]t—Rf—CH2OH  (I) wherein: c=1-10, preferably 1-3; t=0.5-20. Rf=poly-fluorooxyalkylenic chain, having number average molecular weight ({overscore (M)}n) in the range 500-2,500, preferably 1,000-2,000; the number average molecular weight of the formula (I) additive is in the range 3,000-15,000, preferably 3,000-10,000.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: September 10, 2002
    Assignee: Ausimont S.p.A.
    Inventors: Ezio Strepparola, Franco Barbieri
  • Process for preparing aluminum fluoride
    Patent number: 6436362
    Abstract: Process for preparing aluminum fluoride which comprises fluorination of alumina with gaseous HF, characterized in that the alumina is fluorinated with HF at an initial temperature lower than 300° C., the temperature is raised with a temperature gradient ≦100° C./hour up to the final temperature >320° C. and <450° C., fluorination is continued at the final temperature until feeding a HF molar amount at least equal to the stoichiometric with respect to the alumina, 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: August 20, 2002
    Assignee: Ausimont S.p.A.
    Inventor: Paolo Cuzzato
  • Process for obtaining pentafluoroethane by chlorotetrafluoroethane dismutation
    Patent number: 6437200
    Abstract: A gaseous process for obtaining pentafluoroethane by dismutation of chlorotetrafluoroethane in the presence of a supported catalyst, said catalyst being formed of a mixture of trivalent chromium oxide with at least an alkaline-earth metal oxide selected from Mg, Ca, Sr and Ba.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: August 20, 2002
    Assignee: Ausimont S.p.A
    Inventor: Paolo Cuzzato
  • Process for obtaining mixtures of phosphoric mono-and diesters
    Publication number: 20020099234
    Abstract: Process for obtaining mixtures of phosphoric mono- and diesters having the formula:
    Type: Application
    Filed: January 18, 2002
    Publication date: July 25, 2002
    Applicant: Ausimont S.p.A.
    Inventors: Antonio Russo, Claudio Tonelli
  • Thermoplastic fluorinated polymers
    Patent number: 6417279
    Abstract: A composition comprising a polymer mixture A of polymers formed by: (a) from 10 to 70% by moles of ethylene (E), (b) from 30 to 90%, by moles of a fluorinated monomer selected from tetrafluoroethylene (TFE), chlorotrifluoroethylene (CTFE), or mixtures thereof, (c) from 0.1 to 30% by moles, with respect to the total amount of monomers (a) and (b), of one or more acrylic monomers; characterized in that the polymer mixture A comprises polymer fractions having a different content of the acrylic comonomer such that the elastic modulus at 23° C. (ASTM D1708) of said polymer mixture A is lower than at least 10% of the elastic modulus of a polymer formed by monomers a), b) and c) wherein the polymer fractions have substantially an equal content of the acrylic comonomer.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: July 9, 2002
    Assignee: Ausimont S.p.A.
    Inventors: Julio A. Abusleme, Claudia Manzoni
  • Polymerization process in suspension
    Patent number: 6417390
    Abstract: Use of surfactants in the suspension polymerization of fluorinated monomers for preparing fluoropolymers containing hydrogen, said surfacants having the general formula: Rf—[L—(OCHR1—CHR2)m—OZ)]i wherein: i is equal to 1 or 2; m is an integer comprised between 4 and 60; L can be chosen between: —(CFY—CO—O)pR′— and —(CFY—CO—NH)pR′— wherein is an integer equal to 0 or to 1; Y═F, CF3; R′=alkylic radical C1-C5, linear or branched when possible; R1, R2 can be both H or the former H and the latter CH3; Z can be H, alkyl radical C1-C3, linear or branched when possible; or (CH2)nOH with n an integer from 1 to 6; Rf is a perfluoroalkylic radical or a perfluoropolyether radical, having a number average molecular weight comprised between 250 and 1500.
    Type: Grant
    Filed: November 8, 1999
    Date of Patent: July 9, 2002
    Assignee: Ausimont S.p.A.
    Inventors: Julio A. Abusleme, Paolo Lazzari
  • Perfluoropolyether lubricant containing sulphonylfluoride groups
    Patent number: 6403539
    Abstract: Perfluoropolyether lubricants containing sulphonylfluoride groups pending along the perfluoropolyether chain and having the following formula: wherein: T are end groups selected from —CF2X (X═F,CF3Cl), —C3F7, —COF, —CF(CF3)COF, —CF2COF, —CF2COCF3; d,e,f,h are integers; a,b,c can be zero or integers; said units are statistically distributed along the chain, being a+b+c+d+e+f+h such that the number average molecular weight ranges from 500 to 5×105, preferably from 1,000 to 50,000.
    Type: Grant
    Filed: August 2, 2000
    Date of Patent: June 11, 2002
    Assignee: Ausimont S.p.A.
    Inventors: Giuseppe Marchionni, Ugo De Patto
  • Method for removing water from surfaces
    Publication number: 20020066205
    Abstract: Method for removing water from surfaces of various materials, comprising the steps of covering said surface with a composition having specific weight higher than that of water and subsequently removing water from the composition by skimming, wherein a composition essentially consisting of the following components is used:
    Type: Application
    Filed: November 29, 2001
    Publication date: June 6, 2002
    Applicant: Ausimont S.p.A.
    Inventors: Mario Visca, Simonetta Fontana
  • Solvent compositions
    Patent number: 6399562
    Abstract: Azeotropic or near azeotropic solvent compositions, based on 1-difluoromethoxy-1,1,2,2-tetrafluoroethyl difluoromethyl ether, essentially consisting of (% by weight): I) 1-difluoromethoxy 15-99 1,1,2,2-tetrafluoroethyl difluromethyl ether (HCF2OCF2CF2OCF2H); isopentane 85-1  II) 1-difluromethoxy 25-99 1,1,2,2-tetrafluroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H); methyl-acetate 75-1  III) 1-difluoromethoxy 35-99 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H); 1-bromo-propane  65-1.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: June 4, 2002
    Assignee: Ausimont S.p.A.
    Inventors: Giampiero Basile, Mario Visca, Ezio Musso
  • Fluoroelastomer compositions
    Patent number: 6395834
    Abstract: Fluoropolymers comprising a fluoroelastomer matrix incorporating therein particles of a semicrystalline fluoropolymer 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: May 28, 2002
    Assignee: Ausimont S.p.A.
    Inventors: Margherita Albano, Marco Apostolo, Vincenzo Arcella, Enrico Marchese
  • Thermoplastic perhalogenated (CO)polymers of chlorotrifluoroethylene
    Patent number: 6391975
    Abstract: Chlorotrifluoroethylene (CTFE) thermoplastic perhalogenated polymers, formed by the following polymer components: (I) 10-90% by weight of a CTFE homopolymer and (II) 90-10% by weight of a CTFE copolymer modified with comonomer (a) selected from one or more perfluoroalkyl vinylethers having the formula: Rf—O—CF═CF2 wherein: Rf is a C2-C5 perfluoroalkyl group, resulting in the final polymer (I)+(II), the amount of (a) being from 0,2 to 5% by moles and the CTFE the remaining part to 100% by moles.
    Type: Grant
    Filed: July 7, 2000
    Date of Patent: May 21, 2002
    Assignee: Ausimont S.p.A.
    Inventors: Julio A. Abusleme, Claudia Manzoni
  • Thermoplastic compositions of fluoropolymers
    Publication number: 20020058736
    Abstract: A polymer composition formed by:
    Type: Application
    Filed: September 26, 2001
    Publication date: May 16, 2002
    Applicant: AUSIMONT S.p.A.
    Inventors: Mikhail Zolotnitsky, Julio A. Abusleme
  • PTFE-based formulation for the insulation of integrated circuits
    Publication number: 20020052437
    Abstract: A formulation based on the PTFE, homopolymer or modified, comprising:
    Type: Application
    Filed: August 20, 2001
    Publication date: May 2, 2002
    Applicant: Ausimont S.p.A.
    Inventors: Valery Kapeliouchko, Enrico Marchese, Tatiana Temtchenko
  • Compositions for films having a low refractive index
    Patent number: 6376572
    Abstract: Use of a composition for preparing by radical route polymeric films having refractive index lower than 1.400, said composition comprising: a) a perfluoropolyether of formula: T′—Rf.T  (Ia) b) from 0.1 to 10% by weight of a perfluoropolyether of formula: T—Rf—CH2OH  (Ib) c) from 0 to 30% by weight of compounds selected from c1): compounds not containing fluorine: non fluorinated (meth)acrylic esters or vinyl monomers; or c2) compounds containing fluorine: mono(meth)acrylate perfluoropolyethers or perfluoroalkyl mono(meth)acrylates, d) from 0.01 to 10% by weight of a photoinitiator and/or radical initiators, the amount of component a) being the complement to 100 of the composition, with the proviso that defining by B0 the mole number of —CF2CH2OH and by B1 the sum of the moles of the (meth)acrylic end groups, the (B0+B1)/B1 ratio is in the range 1.50-1.01.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: April 23, 2002
    Assignee: Ausimont S.p.A.
    Inventor: Stefano Turri
  • Thermoplastic fluoropolymer compositions containing hydrogenated plasticizers
    Patent number: 6369130
    Abstract: Thermoplastic fluoropolymer compositions, flexible, without whitening, comprising: I) ETFE or ECTFE fluoropolymers modified with hydrogenated monomers; II) one or more hydrogenated plasticizers; III) one or more inorganic fire retardants; IV) optionally other ingredients such as fillers, smoke retarders, intumescent agents, pigments, lubricants, organic fire retardants and thermal stabilizers.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: April 9, 2002
    Assignee: Ausimont S.p.A.
    Inventors: Mikhail Zolotnitsky, Gary Stanitis, Julio A. Abusleme
  • Sulphonic fluorinated ionomers
    Publication number: 20020040106
    Abstract: Sulphonic fluorinated ionomers crosslinked by radical crosslinking of:
    Type: Application
    Filed: August 7, 2001
    Publication date: April 4, 2002
    Applicant: Ausimont S.p.A.
    Inventors: Ivan Wlassics, Vito Tortelli
  • Thermoprocessable copolymers of TFE
    Publication number: 20020037959
    Abstract: A thermoprocessable copolymer of TFE essentially formed by:
    Type: Application
    Filed: September 26, 2001
    Publication date: March 28, 2002
    Applicant: Ausimont S.p.A.
    Inventors: Pasqua Colaianna, Giulio Brinati, Giambattista Besana