Patents Assigned to Ausimont S.p.A.
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Patent number: 7488852Abstract: Processes for the preparation of perfluoropolyethers having structural formula R1O—(CF2O)n—(CF2CF2O)mR2??(I) wherein: R1 is —CH3 or —C2H5; R2 is equal to R1 or —CF2H n is 0 or an integer from 1 to 100; m is an integer from 1 to 100 or, when R2 is —CF2H, m can also be 0; the oxyfluoroalkylene units —(CF2CF2O)— and —(CF2O)— are statistically distributed along the polymer chain.Type: GrantFiled: July 28, 2006Date of Patent: February 10, 2009Assignee: Ausimont S.p.A.Inventors: Giuseppe Marchionni, Mario Visca
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Patent number: 7381463Abstract: Metal substrates having a coating based on ethylene/chlorotrifluoroethylene (E/CTFE) having a TmII of 230° C.-264° C. and a MFI lower than 5 g/10?.Type: GrantFiled: August 1, 2002Date of Patent: June 3, 2008Assignee: Ausimont S.p.A.Inventors: Julio A. Abusleme, Giambattista Besana, Claudia Manzoni
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Patent number: 7358306Abstract: Curable (per)fluoropolyether polyurethanes obtained by reaction in a first step of a) (per)fluoropolyether diols having a number average molecular weight from 2,000 to 5,000; with b) diisocyanates of formula OCN—R—NCO ??(VIA) wherein R is a hydrogenated and/or fluorinated radical; in a second step with the compound c) saturated or unsaturated aliphatic hydrogenated diols, (alkyl)cycloaliphatic, aromatic; oligomers or polymers of butadiene with a number average molecular weight from 500 to 4,000 having end hydroxyl groups; provided that: when the diisocyanate b) is used and the radical R in formula (VIA) is: —Ph—CH2—Ph—, the hydrogenated diols c) are optional; when the radical R has a meaning different from that above mentioned, at least one of the used hydrogenated diols c) is selected from those belonging to the c2)-c6) groups; the sum of the equivalents of the compounds a) and c) being equal to the equivalents of the compound b).Type: GrantFiled: June 20, 2002Date of Patent: April 15, 2008Assignee: Ausimont S.p.A.Inventors: Stefano Turri, Sergio Novelli, Anna Staccione
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Patent number: 7323084Abstract: Use for the paper sizing of aqueous polyurethane dispersions from (per)fluoropolyethers obtainable by reaction among the following compounds: a) (per)fluoropolyether diols having a number average molecular weight from 400 to 5,000; b) diisocyanates having formula: OCN—R—NCO??(VIa) ?wherein R is an aliphatic, cycloaliphatic bifunctional radical; or an aromatic bifunctional radical; c) diols containing one carboxylic function and optionally one or both the following components: d) hydrazine and/or aliphatic diamines; e) monofunctional hydroxylic (per)fluoropolyethers having a number average molecular weight in the range 300-1,000.Type: GrantFiled: June 28, 2002Date of Patent: January 29, 2008Assignee: Ausimont S.p.A.Inventors: Stefano Turri, Tania Trombetta, Paolo Iengo
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Patent number: 7323435Abstract: Fluorinated oligourethanes, having number average molecular weight lower than or equal to 9,000, having a branched structure, formed of the following monomers and macromers: a) aliphatic, cycloaliphatic or aromatic polyisocyanates, b) heterofunctional hydrogenated monomers having general formula: X0—(CR1AR2A)b—Y0 ??(Ib) one or more of the following compounds: c) bifunctional hydroxyl (per)fluoropolyethers (PFPE diols) having number average molecular weight in the range 400-3,000, e) monofunctional hydroxyl (per)fluoropolyethers or monofunctional hydroxyl (per)fluoroalkanes (e?), having number average molecular weight in the range 300-1,000, and optionally the following compounds: d) heterofunctional monomers, dI) hydrogen-active compounds, capable to form bonds with the NCO functions stable at the hydrolysis but weak at heat.Type: GrantFiled: June 12, 2000Date of Patent: January 29, 2008Assignee: Ausimont S.p.A.Inventors: Stefano Turri, Marinella Levi, Tania Trombetta
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Patent number: 7320818Abstract: Multilayer manufactured articles comprising at least one layer based on thermoprocessable copolymers of ethylene with chlorotrifluoroethylene and/or tetrafluroethylene and with acrylic monomers, and one layer based on polyamides.Type: GrantFiled: March 4, 2002Date of Patent: January 22, 2008Assignee: Ausimont S.p.A.Inventors: Julio A. Abusleme, Claudia Manzoni
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Patent number: 7157550Abstract: A purification process of thermoprocessable tetrafluoroethylene (TFE) copolymers comprising the following steps: A) the polymer latex is transformed into gel form, under mechanical stirring, by addition of an acid electrolyte having pH values?2; B) washing of the polymer gel with aqueous solutions having pH from 1 to 7.Type: GrantFiled: March 3, 2004Date of Patent: January 2, 2007Assignee: Ausimont S.p.A.Inventors: Hua Wu, Vincenzo Arcella
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Patent number: 7015368Abstract: A purification process of thermoprocessable tetrafluoroethylene (TFE) copolymers comprising the following steps: A) the polymer latex is transformed into gel form, under mechanical stirring, by addition of an acid electrolyte having pH values ?2; B) washing of the polymer gel with aqueous solutions having pH from 1 to 7.Type: GrantFiled: July 26, 2002Date of Patent: March 21, 2006Assignee: Ausimont S.p.A.Inventors: Hua Wu, Vincenzo Arcella
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Patent number: 6949676Abstract: Compounds of formula CH2Y—CH(COOR1)—O—CF2CF2—SO2F, usable in the synthesis of the fluorosulphonic vinylether —CF2?CF—O—CF2CF2—SO2F.Type: GrantFiled: February 5, 2004Date of Patent: September 27, 2005Assignee: Ausimont S.p.A.Inventors: Vito Tortelli, Sara Maculan
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Patent number: 6939495Abstract: A thermoprocessable copolymer of TFE essentially formed by: (a) from 4.5 to 8.5% by weight of perfluoromethylvinylether (PMVE); (b) from 0.3 to 1.6% by weight of a perfluorodioxole of formula: wherein: Y=F, ORf, Rf wherein Rf is a perfluoroalkyl having from 1 to 5 carbon atoms; X1 and X2, equal to or diferent from each other, are —F or —CF3; (c) TFE, forming the remaining part to 100%.Type: GrantFiled: March 10, 2003Date of Patent: September 6, 2005Assignee: Ausimont S.p.A.Inventors: Pasqua Colaianna, Giulio Brinati, Giambattista Besana
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Patent number: 6936654Abstract: 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: November 17, 2003Date of Patent: August 30, 2005Assignee: Ausimont, S.p.A.Inventors: Stefano Turri, Aldo Sanguineti, Massimo Scicchitano
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Patent number: 6902676Abstract: Porous hydrophilic membranes comprising a porous inert support on which an ionomer is deposited, said membranes being characterized in that they have a water permeability higher than 1 l/(h.m2.Atm).Type: GrantFiled: February 25, 2002Date of Patent: June 7, 2005Assignee: Ausimont S.p.A.Inventors: Vincenzo Arcella, Alessandro Ghielmi
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Patent number: 6899955Abstract: A process for inhibiting the fouling of a substrate in a marine fouling environment, which comprises forming on the substrate, before exposure to the said environment, a coating comprising a curable fluorinated resin of the general formula: W-L-YFC—O—Rf—CFY-L-W wherein: W is a group of the general formula —Si(R1)?(OR2)3-?, wherein ?=0, 1, or 2, preferably ?=0, R1 and R2 independently have the meaning of linear of branched C1-C6 alkyl groups, optionally containing one or more ether groups, or C7-C12 aryl or alkyl groups, and preferably R1 and R2 are C1-C4 alkyl groups; L is an organic linking group; Y is F or CF3; and Rf is a group having an average molecular weight by number between 350 and 8000, preferably between 500 and 3000, and comprising repeating units having at least one of the following structures randomly distributed along the chain: —CFXO—, CF2CF2O—, CF2CF2CF2O—, CF2CF2CF2CF2O—, CR4R5CF2CF2O—, —(CF(CF3)CF2O)—, —CF2CF(CF3)O—, wherein X is F or CF3, R4 and R5 independently have the meaning of H, Cl,Type: GrantFiled: June 1, 2001Date of Patent: May 31, 2005Assignees: International Coatings Limited, Ausimont S.p.A.Inventors: Robert Lines, David Neil Williams, Stefano Turri
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Patent number: 6878453Abstract: A multilayer comprising at least one layer A) of at least one thermoprocessable polymer containing at least 5% by weight of chlorinated polyvinyl chloride (CPVC) and one layer B) based on polyamides having an amount of —NH2 end groups in the range 20-300 ?eq/g.Type: GrantFiled: May 31, 2002Date of Patent: April 12, 2005Assignee: Ausimont S.p.A.Inventors: Julio A. Abusleme, Claudia Manzoni, Giambattista Besana
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Patent number: 6844036Abstract: Fluoroelastomeric compositions comprising: A) a fluoroelastomeric matrix; B) a semi-crystalline fluoropolymer, in an amount from higher than 40% to 90% by weight based on the total of A)+B); the fluoroelastomer A) incorporates the fluoropolymer B), the fluoropolymer B) being formed by tetrafluoroethylene (TFE) homopolymers, or by TFE by copolymers with one or more monomers containing at least one unsaturation of ethylene type, the average sizes of the semi-crystalline fluoropolymer particles being from 10 to 100 nm, preferably from 10 to 60 nm.Type: GrantFiled: May 22, 2002Date of Patent: January 18, 2005Assignee: Ausimont S.p.A.Inventors: Marco Apostolo, Margherita Albano, Stefano Arrigoni
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Patent number: 6825304Abstract: A formulation based on the PTFE, homopolymer or modified, comprising: 1) latex of said PTFE having a particle diameter between 5 and 100 nm, comprising an anionic fluorinated surfactant in an amount in the range 2-25% by weight based on the PTFE; 2) non ionic fluorinated surfactant added to the PTFE latex in an amount in the range 18-60% by weight based on the PTFE.Type: GrantFiled: August 20, 2001Date of Patent: November 30, 2004Assignee: Ausimont S.p.A.Inventors: Valery Kapeliouchko, Enrico Marchese, Tatiana Temtchenko
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Patent number: 6822050Abstract: Fluoroelastomeric compositions comprising: A) a fluoroelastomeric matrix based on vinylidene fluoride (VDF); B) a semi-crystalline fluoropolymer, in an amount from >40% to 90% by weight based on the total of A)+B), comprising a semi-crystalline fluoropolymer core coated by a semi-crystalline fluoropolymer shell containing bromine and/or iodine in the polymer chain; the fluoroelastomer A) incorporates the fluoropolymer B), the fluoropolymer B) being formed by tetrafluoroethylene (TFE) homopolymers, or by TFE copolymers with one or more monomers containing at least one unsaturation of ethylene type, the average sizes of the semi-crystalline fluoropolymer particles being from 10 to 100 nm, preferably from 10 to 60 nm.Type: GrantFiled: May 22, 2002Date of Patent: November 23, 2004Assignee: Ausimont S.p.A.Inventors: Margherita Albano, Marco Apostolo, Stefano Arrigoni
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Patent number: 6821454Abstract: 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: a fluorinated non ionic additive component A) of formula: T-ORf(CFY)-L (I) a (per)fluoropolyether component B), wherein the ratio by weight (K) between the (per)fluorinated part and the hydrogenated L part of the additive is in the range 1.50-4.00 and the ratio KI between the number average molecular weight of the fluoropolyether part T-ORf— of the additive and the number average molecular weight of the component B) is higher than 1.60.Type: GrantFiled: November 29, 2001Date of Patent: November 23, 2004Assignee: Ausimont S.p.A.Inventors: Mario Visca, Simonetta Fontana
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Patent number: 6818688Abstract: Use for improving the hydro- and oil-repellence properties of substrata having a low surface energy of (per)fluoropolyether mono- and bifunctional derivatives having the structures: W—L—YFC—O—Rf—CFY—L—W (I) Rf—CFY—L—W (II) wherein: L is a linking organic group —CO—NR′—(CH2)q—, with R′═H or C1-C4 alkyl; q is comprised between 1 and 8; Y═F, CF3; W is a —Si(R1)&agr;(OR2)3-&agr; group with &agr;=0,1,2, R1 and R2 equal to or different from each other are C1-C6 alkyl groups, C6-C10 aryl groups, C7-C12 alkyl-aryls or aryl-alkyls; Rf has a number average molecular weight in the range 200-5,000 and comprises repeating units having at least one of the following structures: (CFXO), (CF2CF2O), (CF(CF3)CF2O), (CF2CF(CF3)O), wherein X═F, CF3.Type: GrantFiled: May 4, 2001Date of Patent: November 16, 2004Assignee: Ausimont S.p.A.Inventor: Mario Visca
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Patent number: 6809167Abstract: Tetrafluoroethylene (TFE) thermoprocessable copolymer microspheres having a substantially spherical shape for at least 95% by weight, the average size of the microspheres being in the range 25 &mgr;m and 2 mm, the bulk density being in the range 0.5 and 1.1 g/cm3.Type: GrantFiled: June 23, 2003Date of Patent: October 26, 2004Assignee: Ausimont S.p.A.Inventors: Hua Wu, Francesco Morandi