Patents Assigned to Ausimont S.p.A.
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Patent number: 6706803Abstract: A process for the synthesis of chlorotrifluoroethylene (PCTFE) (co)polymers, containing at least 80% by moles of CTFE, being the complement to 100 one or more fluorinated monomers, preferably the complement to 100 is formed of one or more perfluorinated monomers, characterized in that the reaction medium comprises (per)fluoropolyoxyalkylene microemulsions wherein the fluorinated surfactant is salified with sodium and/or potassium and an inorganic potassium and/or sodium initiator.Type: GrantFiled: July 7, 2000Date of Patent: March 16, 2004Assignee: Ausimont S.p.A.Inventors: Julio A. Abusleme, Claudia Manzoni
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Patent number: 6706834Abstract: Sulphonic fluorinated ionomers crosslinked by radical crosslinking of: A) crosslinkable sulphonic fluorinated ionomers, having equivalent weight 380-1300 g/eq and comprising: from 48% to 85% by moles of monomeric units deriving from tetrafluoroethylene (TFE); from 15% to 47% by moles of fluorinated monomeric units containing sulphonyl groups —SO2F; from 0.01% to 5% by moles of monomeric units deriving from a bis-olefin of formula: wherein: m=2-10, preferably 4-8; R1, R2, R5, R6, equal to or different from each other, are H or C1-C5 alkyl groups; B) a fluorinated compound as crosslinking radical initiator; C) a fluorinated bis-olefin of structure (I) as crosslinking agent; the radical crosslinking being carried out at a temperature in the range 250° C.-310° C., preferably 260° C.-300° C.Type: GrantFiled: August 7, 2001Date of Patent: March 16, 2004Assignee: Ausimont S.p.A.Inventors: Ivan Wlassics, Vito Tortelli
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Patent number: 6706351Abstract: A multilayer composition comprising: A) a first layer based on copolymers of ethylene (E) with tetrafluoroethylene (TFE) and/or chorotrifluoroethylene (CTFE); B) a second intermediate layer comprising thermoprocessable copolymers of ethylene (E) with tetrafluoroethylene (TFE) and/or chorotrifluoroethylene (CTFE) modified with acrylic monomers; C) a third layer based on hydrogenated polymers; said multilayer composition containing in layer B) and/or in layer C) one or more crosslinking agents.Type: GrantFiled: September 14, 2001Date of Patent: March 16, 2004Assignee: Ausimont S.p.A.Inventors: Julio A. Abusleme, Claudia Manzoni
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Patent number: 6703521Abstract: Compounds of formula CH2Y—CH(COOR1)—O—CF2CF2—SO2F, usable in the synthesis of the fluorosulphonic vinylether —CF2═CF—O——CF2CF2—SO2F.Type: GrantFiled: December 27, 2002Date of Patent: March 9, 2004Assignee: Ausimont S.p.A.Inventors: Vito Tortelli, Sara Maculan
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Patent number: 6699485Abstract: Base compositions (premix) comprising the following components: A) a perfluoropolyether phosphate; B) a solvent; C) water.Type: GrantFiled: August 2, 2000Date of Patent: March 2, 2004Assignee: Ausimont S.p.A.Inventor: Giovanni Pantini
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Patent number: 6696512Abstract: 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: CH3(CH2)nO(C3H6O)p(CH2CH2O)mH (I) wherein: n is in the range 8-20, preferably 12-15; m is in the range 5-20, preferably 7-12; p is in the range 1-8, preferably it is 1 or 2.Type: GrantFiled: January 17, 2002Date of Patent: February 24, 2004Assignee: Ausimont S.p.A.Inventors: Tiziana Poggio, Enrico Marchese
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Patent number: 6683128Abstract: Additives for hydrogenated resins obtainable by using the following components: a) bifunctional perfluoropolyethers having a —COOR end group, optionally in admixture with monofunctional perfluoropolyethers having a —COOR end group, b) mono, bi or polyfunctional hydrogenated monomers having functional groups able to react with the —COOR end groups of compound a); c) polyolefins having functional groups able to react with the block oligomer/polymer obtained by reaction of a) with b), preferably said functional groups being obtained by grafting with maleic anhydride; reacting in a first step a) with b), until disappearance of the —COOR group of component a), and in a second step the product obtained from the reaction of a) with b) with the functionalized polyolefins c).Type: GrantFiled: March 12, 2002Date of Patent: January 27, 2004Assignee: Ausimont S.p.A.Inventors: Stefano Turri, Aldo Sanguineti, Massimo Scicchitano
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Patent number: 6673866Abstract: A polymer composition formed by: I) fluoropolymers selected from one or more of the following: copolymers based on ethylene, TFE and/or CTFE modified with hydrogenated monomers, or blends of these fluoropolymers with PCTFE; said fluoropolymers and/or the corresponding blends optionally mixed with hydrogenated plasticizers; II) one or more inorganic fire-retardants, treated and not with dispersing agents; III) one or more crosslinking agents; IV) optional additives.Type: GrantFiled: September 26, 2001Date of Patent: January 6, 2004Assignee: Ausimont S.p.A.Inventors: Mikhail Zolotnitsky, Julio A. Abusleme
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Patent number: 6664338Abstract: Fluoroelastomers curable by ionic route based on vinylidene fluoride (VDF) comprising: a) 100 parts by weight of fluoroelastomer based on vinylidene fluoride (VDF) substantially polar end group free; b) from 0.05 to 5 phr of accelerant; c) from 0.5 to 15 phr of curing agent; d) from 1 to 40 phr of one or more inorganic acid acceptors, preferably bivalent metal oxides; e) from 0 to 2.5 phr, preferably from 0 to 1.5 phr of one or more basic compounds preferably hydroxides of bivalent metals or of weak acid metal salts; f) from 0 to 80 phr of reinforcing fillers.Type: GrantFiled: April 23, 2002Date of Patent: December 16, 2003Assignee: Ausimont S.p.A.Inventors: Anna Staccione, Margherita Albano
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Patent number: 6660798Abstract: Mixtures of fluoropolymer dispersions comprising: a) one or more dispersions constituted by TFE homopolymers or by its copolymers with particle average sizes ranging from 180 to 400 nm; b) one or more TFE copolymer dispersions with one or more monomers containing at least one ethylene unsaturation, the comonomer amount being such that the dispersion contains a number of fibrils lower than 10% of the total number of particles; said fibrils being polymer particles having a length/diameter (L/D) ratio higher than 5; the dispersion particle average sizes are smaller of about 90 nm; the component b) contains a comonomer amount such that the resulting polymer is not elastomeric and furthermore it shows composition and viscosity characteristics of the melt such as not to be thermoprocessable.Type: GrantFiled: June 7, 2000Date of Patent: December 9, 2003Assignee: Ausimont S.p.A.Inventors: Enrico Marchese, Mario Visca, Daria Lenti
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Patent number: 6656991Abstract: Compounds comprising a peroxide and a curable blend by peroxidic way, consisting essentially of hydrocarbon elastomers containing at least an acrylic monomer, and of unsaturated fluorinated elastomers obtained by dehydro halogenation of fluorinated VDF-based elastomers, said fluorinated elastomers having in the polymer chain at least 5% by moles of hydrogenated C1 groups of the type —CH2— and/or —CH3, the amount of unsaturated fluorinated elastomer in the elastomeric blend being comprised from 1 to 99% by weight.Type: GrantFiled: August 17, 2001Date of Patent: December 2, 2003Assignee: Ausimont S.p.A.Inventors: Anna Staccione, Julio Abusleme
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Patent number: 6653495Abstract: Process for obtaining mixtures of phosphoric mono- and diesters having the formula: [Rf—CF2—(CH2)q—Z]w—P(O)(OH)3−w (I) HO—[OH(O)P—Z—(CH2)q—CF2—O—Rf—CF2—(CH2)q—Z]v—P(O)(OH)2 (II) wherein: w=1-2; v=1-6; q=1-20; Z=O(C2H4O)p—, O(CH2)n—O—, O(C3H6O)p—, S(C2H4O)p—, S(C3H6O)p—; n=1-20; p=1-5; Rf represents a (per)fluoropolyether chain; Rf in formula (I) is a monofunctional perfluoropolyether chain wherein the chain end group is selected from: CF3O—, C2F5O—, C3F7O—, Cl(C3F6O)—, H(C3F6O)—.Type: GrantFiled: January 18, 2002Date of Patent: November 25, 2003Assignee: Ausimont S.p.A.Inventors: Antonio Russo, Claudio Tonelli
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Patent number: 6642331Abstract: Perfluoroelastomers, curable by peroxidic route, obtainable by polymerizing the following monomers: a) tetrafluoroethylene (TFE); b) fluorovinylethers of general formula: CFX═CXOCF2OR (I) c) bis-olefins having general formula: RI1RI2C═CRI3—Z—CRI4═CRI5RI6 (IA) d) optionally, one or more fluorinated olefinic comonomers selected from C2-C8 perfluoroolefins, perfluoroalkylvinylethers (PAVE) CF2═CFOR2f, perfluoro-oxyalkylvinylethers CF2═CFOXa, said perfluoroelastomers comprising iodine and/or bromine atoms in the chain and/or in end position, said halogen atoms deriving from “cure site” comonomers and/or from chain transfer agents used in polymerization.Type: GrantFiled: October 16, 2002Date of Patent: November 4, 2003Assignee: Ausimont S.p.A.Inventors: Marco Apostolo, Stefano Arrigoni
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Patent number: 6639011Abstract: A polymerization process in aqueous emulsion of: (I) one or more fluorinated monomers containing at least one ethylene unsaturation; (II) one or more fluorinated monomers, containing sulphonyl groups —SO2F; said process comprising the use of a surfactant having the formula: Rf—X−M+ wherein X is equal to —COO, —SO3; M is selected from H, NH4, alkaline metal; Rf represents a (per)fluoropolyether chain, preferably having number average molecular weight comprised between about 230 and about 1,800.Type: GrantFiled: December 20, 2002Date of Patent: October 28, 2003Assignee: Ausimont S.p.A.Inventors: Vincenzo Arcella, Alessandro Ghielmi, Giulio Tommasi
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Patent number: 6630271Abstract: Use of vinylidenfluoride (VDF) copolymers for preparing electrolyte polymers, wherein the VDF copolymers have the following polymeric structure (I): (CH2—CF2)m—(CXY—C(ORf)Z)n—(CF2—CF(CF3))p) wherein: Rf is a perfluoroalkyl group having from 1 to 3 carbon atoms; X, Y, and Z equal to or different from each other are selected from F, Cl or H; m,n and p are integers, n or p can be 0 but not simultaneously; said VDF copolymers being obtainable by emulsion polymerization at 75-120° C., preferably 95°-120° C., in the presence of organic initiators.Type: GrantFiled: February 2, 2000Date of Patent: October 7, 2003Assignee: Ausimont S.p.A.Inventors: Vincenzo Arcella, Giulio Brinati, Aldo Sanguineti
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Publication number: 20030187144Abstract: Fluoroelastomers curable by ionic route based on vinylidenfluoride (VDF) comprising:Type: ApplicationFiled: April 23, 2002Publication date: October 2, 2003Applicant: AUSIMONT S.p.A.Inventors: Anna Staccione, Margherita Albano
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Publication number: 20030166769Abstract: Formulations formed by aqueous dispersions of cationic ionomer fluorinated polyurethanes based on (per)fluoropolyethers, having end groups constituted by —NCO groups reacted with hydrogenactive compounds to give covalent bonds stable to water but thermolabile, usable for the surface hydro- and oil-repellent treatment of textiles.Type: ApplicationFiled: December 30, 2002Publication date: September 4, 2003Applicant: AUSIMONT S.p.A.Inventors: Tania Trombetta, Stefano Turri
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Publication number: 20030166751Abstract: Compounds comprising a peroxide and a curable blend by peroxidic way, consisting essentially of hydrocarbon elastomers containing at least an acrylic monomer, and of unsaturated fluorinated elastomers obtained by dehydro halogenation of fluorinated VDF-based elastomers, said fluorinated elastomers having in the polymer chain at least 5% by moles of hydrogenated C1 groups of the type —CH—, —CH2— and/or —CH3, the amount of unsaturated fluorinated elastomer in the elastomeric blend being comprised from 1 to 99% by weight.Type: ApplicationFiled: August 17, 2001Publication date: September 4, 2003Applicant: Ausimont S.p.AInventors: Anna Staccione, Julio Abusleme
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Patent number: 6610686Abstract: Pirenoxine or 1-hydroxy-5-oxo-5H-pyrido-[3,2a]-phenoxazin-3-carboxylic acid, also called pirfenossone and already used as anti-cataract agent, in the form of a pharmaceutically acceptable salt thereof, if desired, is used for the protection of the corneal tissue in photokeratectomy interventions, as cornea photoablation using excimer laser, for both refractive and therapeutic purpose. In fact pirenoxine is able to inhibit, in the cornea, the oxidative phenomena determined by reactive oxygen species (ROS) which are produced within the tissues following the laser irradiation.Type: GrantFiled: November 15, 2001Date of Patent: August 26, 2003Assignee: Ausimont S.p.A.Inventors: Boldrini Enrico, Ciuffi Mario
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Publication number: 20030158359Abstract: Thermoprocessable copolymers of TFE essentially formed by the following monomers:Type: ApplicationFiled: December 19, 2002Publication date: August 21, 2003Applicant: AUSIMONT S.p.AInventors: Pasqua Colaianna, Giulio Brinati, Giambattista Besana