Patents by Inventor Ezio Strepparola
Ezio Strepparola 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).
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Patent number: 6509509Abstract: A process for preparing perfluoropolyoxyalkylenes with hydroxyl end groups having structure: T1—CFW1—O—Rf—CFW2—T2 (I) wherein: T1, T2, are selected from —CH2OH, —F, —CF3, —CF2CF3 with the proviso that at least one of T1 and T2 is —CH2OH; W1 and W2 are selected from F, CF3; Rf is a perfluoropolyoxyalkylene chain having a number average molecular weight 500-10,000 comprising one or more units of the type —CF2CF2O—, —CF2O—, —C3F6O—, —CF2(CF2)zCF2O— (z=1,2); —CR4R5CF2CF2O— with R4 and R5 selected from H, Cl, perfluoroalkyl group; said process comprising the following steps: a) adding an ester precursor having structure (I) and T1, T2 end groups selected from —F, —CF3, —CF2CF3, —COOR (R=linear or branched alkyl group having a number of C atoms from 1 to 5), with the proviso that at least one of T1 and T2 is —COOR, in a reaction mixture fType: GrantFiled: December 29, 2000Date of Patent: January 21, 2003Assignee: Ausimont S.p.A.Inventors: Claudio Tonelli, Antonio Russo, Ezio Strepparola
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Patent number: 6448319Abstract: 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: GrantFiled: January 12, 2000Date of Patent: September 10, 2002Assignee: Ausimont S.p.A.Inventors: Ezio Strepparola, Franco Barbieri
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Publication number: 20010007046Abstract: A process for preparing perfluoropolyoxyalkylenes with hydroxyl end groups having structure:Type: ApplicationFiled: December 29, 2000Publication date: July 5, 2001Applicant: Ausimont S.p.A.Inventors: Claudio Tonelli, Antonio Russo, Ezio Strepparola
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Patent number: 6156937Abstract: Fluoropolyethers having functional groups, consisting of randomly distributed sequences of perfluoropolyoxyalkylene units selected from: ##STR1## where X is F or CF.sub.3 T, T', T"=a perfluoroalkyl group containing from 1 to 3 carbon atoms and one or two atoms of Cl, Br or I;R, R'=halogen atoms;Y=a functional group;o, q=numbers, zero included, such that o+q=1-20;n=a number ranging from 1 to 15;m/n=a number ranging from 0.01 to 0.5;p=a number ranging from 1 to 20;s/p=a number ranging from 0.5 to 2; andz/o+p=a number ranging from 0.01 to 0.05.Type: GrantFiled: January 20, 1998Date of Patent: December 5, 2000Assignee: Ausimont S.p.A.Inventors: Giuseppe Marchionni, Piero Gavezotti, Ezio Strepparola
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Patent number: 6096240Abstract: Method for the water removal from a surface, which comprises covering the surface with a composition having specific weight higher than that of the water, and subsequently removing water from the composition by skimming, such composition comprising a (per)fluoropolyether having molecular weight comprised between 300 and 1500 and a non ionic additive having a (perfluoropolyethereal structure similar to that of the solvent, linked to an hydrogenated part of hydrophilic type, the molecular weight of the (per)fluorinated part is comprised between 400 and 1200 and the ratio by weight between (per)fluorinated part and hydrogenated part is comprised between 1.5 and 3.5.Type: GrantFiled: May 27, 1999Date of Patent: August 1, 2000Assignee: Ausimont S.p.A.Inventors: Ezio Strepparola, Simonetta Fontana, Rossella Silvani
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Patent number: 6005054Abstract: Use of additives of the classes of mono- and/or di-hydroxypolyfluoroethers comprising the fluoropolyoxyalkylenic repeating units chosen from the following ones: (C.sub.3 F.sub.6 O); (CFXO) wherein X=F, CF.sub.3 ; (CH.sub.2 CF.sub.2 CF.sub.2 O); (CF.sub.2 (CF.sub.2).sub.z CF.sub.2 O) wherein z is an integer equal to 1 or 2; (C.sub.2 F.sub.4 O), in curable compositions of fluoroelastomers to improve the coefficient of friction without lowering the adhesion with bonding agents to metal reinforcements.Type: GrantFiled: April 29, 1997Date of Patent: December 21, 1999Assignee: Austimont S.p.A.Inventors: Franco Barbieri, Ezio Strepparola, Mauro Luca Villa, Raffaele Ferro
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Patent number: 5980642Abstract: Method for the water removal from a surface, which comprises covering the surface with a composition having specific weight higher than that of the water, and subsequently removing water from the composition by skimming, such composition comprising a (per)fluoropolyether having molecular weight comprised between 300 and 1500 and a non ionic additive having a (per-fluoropolyethereal structure similar to that of the solvent, linked to an hydrogenated part of hydrophilic type, the molecular weight of the (per)fluorinated part is comprised between 400 and 1200 and the ratio by weight between (per)fluorinated part and hydrogenated part is comprised between 1.5 and 3.5.Type: GrantFiled: August 22, 1997Date of Patent: November 9, 1999Assignee: Ausimont S.P.A.Inventors: Ezio Strepparola, Simonetta Fontana, Rossella Silvani
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Patent number: 5969192Abstract: A process for preparing hydrogen-terminated polyoxyperfluoroalkanes having molecular weight lower than 1800, by decarboxylation of the corresponding polyoxyperfluoroalkanes having one or two end groups selected form --OCF.sub.2 COOZ, --OCF.sub.2 CF.sub.2 COOZ and --OCF(CF.sub.3)COOZ, wherein Z is an alkaline metal or ammonium, carried out in the presence of water at temperatures from 140.degree.-170.degree. C. and under a pressure of at least 4 atmospheres.Type: GrantFiled: December 19, 1996Date of Patent: October 19, 1999Assignee: Ausimont S.p.A.Inventors: Giuseppe Marchionni, Gianfranco Spataro, Ezio Strepparola
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Patent number: 5917008Abstract: Polytetrafluoroethylene (PTFE) dispersions in an organic solvent, comprising:(A) from 2 to 40% by weight of PTFE in powder form;(B) from 50 to 95% by weight of an organic solvent;(C) from 0.5 to 10% by weight of a dispersing agent of formula:(R.sub.H -L).sub.y -(R.sub.F -L).sub.x R.sub.H (I)whereinx is an integer from 1 to 3;y is 0 or 1, with the proviso that x=1 when y=1;R.sub.H is a x-functional radical having an alkylic or polyoxyalkylenic structure;R.sub.F is (per)fluoropolyoxyalkylenic radical;L is a divalent organic group.Such dispersions are utilized for the surface treatment of metals, glass fibers, and the like, and in particular as mould release agents.Type: GrantFiled: June 19, 1998Date of Patent: June 29, 1999Assignee: Ausimont S.p.A.Inventors: Laura Montagna, Ezio Strepparola
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Patent number: 5814698Abstract: Polytetrafluoroethylene (PTFE) dispersions in an organic solvent, comprising:(A) from 2 to 40% by weight of PTFE in powder form;(B) from 50 to 95% by weight of an organic solvent;(C) from 0.5 to 10% by weight of a dispersing agent of formula:(R.sub.H --L).sub.y --(R.sub.F --L).sub.x R.sub.H (I)wherein:x is an integer from 1 to 3;y is 0 or 1, with the proviso that x=1 when y=1;R.sub.H is a x-functional radical having an alkylic or polyoxyalkylenic structure;R.sub.F is (per)fluoropolyoxyalkylenic radical;L is a divalent organic group.Such dispersions are utilized for the surface treatment of metals, glass fibers, and the like, and in particular as mold release agents.Type: GrantFiled: March 22, 1996Date of Patent: September 29, 1998Assignee: Ausimont S.p.A.Inventors: Laura Montagna, Ezio Strepparola
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Patent number: 5714637Abstract: Fluoropolyethers having functional groups, consisting of randomly distributed sequences of perfluoropolyoxyalkylene units selected from: ##STR1## and included in one of the following formulas: ##STR2##T'--O--(CF.sub.2 CF.sub.2 O).sub.p (CF.sub.2 O).sub.s --CRR'--Y(II) ##STR3## where X is F or CF.sub.3 T, T', T"=a perfluoroalkyl group containing from 1 to 3 carbon atoms and one or two atoms of Cl, Br or I;R, R'=halogen atoms;Y=a functional group;o, q=numbers, zero included, such that o+q=1-20;n=a number ranging from 1 to 15;m/n=a number ranging from 0.01 to 0.5;p=a number ranging from 1 to 20;s/p=a number ranging from 0.5 to 2; andz/o+p=a number ranging from 0.01 to 0.05.Type: GrantFiled: June 2, 1995Date of Patent: February 3, 1998Assignee: Ausimont S.R.L.Inventors: Giuseppe Marchionni, Piero Gavezotti, Ezio Strepparola
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Patent number: 5637671Abstract: 1) Disclosed herein are new fluorine-containing compounds having polyacetalic structure, of general formula:[Rf.sub.m --CH.sub.2 O(CH.sub.2 O).sub.c --CH.sub.2 --.brket close-st..sub.n (I)where:Rf=a perfluorooxyalkylene chain having Mn from 500 to 5,000;m=4-25;c=1-10;n=2-100.2) A process for preparing them which comprises carrying out the polycondensation of diols having formula:HORfOH (II)with formaldehyde, in mass or in the presence of solvents, in an acid medium. The compounds of formula (I) can be oligomeric compounds (polymerization degree x.sub.n from 2 to about 20) or polymeric compounds (x.sub.n from about 20 to about 100). They exhibit a high stability to heat and to chemical agents, and Tg values slightly different from the ones of the diols utilized for preparing them.Type: GrantFiled: October 12, 1995Date of Patent: June 10, 1997Assignee: Ausimont S.p.A.Inventors: Ferdinando Danusso, Ezio Strepparola, Marinella Levi, Claudio Tonelli, Stefano Turri
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Patent number: 5623037Abstract: Coatings based on perfluoropolyethers terminated with acrylic groups and containing ethoxylic groups as a connecting bridge between the fluorinated part and the (meth)acrylic group.Type: GrantFiled: April 28, 1994Date of Patent: April 22, 1997Assignee: Ausimont S.p.A.Inventors: Giovanni Simeone, Claudio Tonelli, Ezio Strepparola, Fabrizio Mutta
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Patent number: 5476918Abstract: 1) New fluorine-containing compounds having polyacetalic structure, of general formula:(I)[Rf.sub.m --CH.sub.2 O(CH.sub.2 O).sub.c --CH.sub.2 ].sub.nwhere:Rf=a perfluorooxyalkylene chain having Mn from 500 to 5,000;m=4-25;c=1-10;n=2-100.2) A process for preparing them, which comprises carrying out the polycondensation of diols having formula:(II) HORfOHwith formaldehyde, in mass or in the presence of solvents, in an acid medium. The compounds of formula (I) can be oligomeric compounds (polymerization degree x.sub.n from 2 to about 20) or polymeric compounds (x.sub.n from about 20 to about 100). They exhibit a high stability to heat and to chemical agents, and Tg values slightly different from the ones of the diols utilized for preparing them.Type: GrantFiled: May 5, 1993Date of Patent: December 19, 1995Assignee: Ausimont, S.p.A.Inventors: Ferdinando Danusso, Ezio Strepparola, Marinella Levi, Claudio Tonelli, Stefano Turri
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Patent number: 5446205Abstract: Fluoropolyethers having functional groups, consisting of randomly distributed sequences of perfluoropolyoxyalkylene units selected from: ##STR1## and included in one of the following formulas: ##STR2## where X is F or CF.sub.3 T, T', T"=a perfluoroalkyl group containing from 1 to 3 carbon atoms and one or two atoms of Cl, Br or I;R, R'=halogen atoms;Y=a functional group;o, q=numbers, zero included, such that o+q=1-20;n=a number ranging from 1 to 15;m/n=a number ranging from 0.01 to 0.5;p=a number ranging from 1 to 20;s/p=a number ranging from 0.5 to 2; andz/o+p=a number ranging from 0.01 to 0.05.Type: GrantFiled: February 24, 1994Date of Patent: August 29, 1995Assignee: Ausimont S.r.l.Inventors: Giuseppe Marchionni, Piero Gavezotti, Ezio Strepparola
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Patent number: 5424438Abstract: Polishes for metal surfaces, based on dispersions of waxes, fluorinated polymers and perfluoropolyoxyalkylene oils acquire high gloss characteristics combined with improved water-repellency and resistance to soiling of 0.1-5% by weight of at least a cationic emulsifier comprised in the general formula(I) R-L-Q.sup.+ X.sup.-where:R=a chain of perfluoropolyoxyalkylene units;L=a divalent organic group;Q=a polar group;X=a halogen, or a group of formulaCH.sub.3 -Phenylene-SO.sub.3.sup.-R"SO.sub.3.sup.-R"=F-(CF.sub.2).sub.m -;t=1 or 2;m=1-4.The polished containing the emulsifiers of formula (I) as well as the compounds comprised in said formula are claimed as new products.Type: GrantFiled: January 6, 1994Date of Patent: June 13, 1995Assignee: Ausimont S.p.A.Inventors: Alba Chittofrati, Viviana Boselli, Giovanni Gavazzi, Ezio Strepparola, Renato Spiti, Silvia Tresoldi
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Patent number: 5395657Abstract: Oil- and water-repellency is imparted to the surface of a porous ceramic material, in particular of "cotto", by applying a phosphoric monoester having formula: ##STR1## where: L is a divalent organic group; m=1; Y is --F or --CF.sub.3 ;Z.sup.+ is a cation; R.sub.f is a polyperfluoroalkylene oxide chain.Type: GrantFiled: December 16, 1993Date of Patent: March 7, 1995Assignee: Ausimont S.p.A.Inventors: Ezio Strepparola, Viviana Boselli, Mauro Scapin
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Patent number: 5376289Abstract: The present invention relates to additives for lubricating oils and greases which endow said lubricating oils and greases extremely good performance characteristics under boundary lubrication conditions. Such additives are derivatives of monofunctional or difunctional perfluoropolyethers constituted by mercaptans, sulfides, disulfides, phosphines, phosphine-oxides and phosphoric acid triesters.Type: GrantFiled: October 1, 1992Date of Patent: December 27, 1994Assignee: Ausimont S.p.A.Inventors: Laura Montagna, Ezio Strepparola, Michael Quallo
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Patent number: 5294248Abstract: Polishes for metal surfaces, based on dispersions of waxes, fluorinated polymers and perfluoropolyoxyalkylene oils acquire high gloss characteristics combined with improved water-repellency and resistance to soiling of 0.1-5% by weight of at least a cationic emulsifier comprised in the general formulaR--L--Q.sup.+ X.sup.-.sub.t (I)where:R=a chain of perfluoropolyoxyalkylene units;L=a divalent organic group;Q=a polar group;X=a halogen, or a group of formulaCH.sub.3 -Phenylene-SO.sub.3.sup.-R"SO.sub.3 --R"=F-(CF.sub.2).sub.m -;t=1 or 2;m=1-4.The polished containing the emulsifiers of formula (I) as well as the compounds comprised in said formula are claimed as new products.Type: GrantFiled: February 19, 1993Date of Patent: March 15, 1994Assignee: Ausimont S.p.A.Inventors: Alba Chittofrati, Viviana Boselli, Giovanni Gavazzi, Ezio Strepparola, Renato Spiti, Silvia Tresoldi
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Patent number: 5210188Abstract: 1. Dyestuffs for cyclic or straight polyfluoropolyoxyalkylenes, of general formula:Q[B--(A).sub.s ].sub.t (III)or[(Q).sub.s --B].sub.2 A (IV)where:Q=an organic group containing a chromophore group, free from free or salified sulphonic and/or carboxylic groups, and/or sulphon-amidic groups;A=a perfluorooxyalkylene chain, which is monovalent in formula (II) and divalent in formula (III);B=an organic at least divalent group;s, t=1 or 2, respectively.2. Compositions comprising cyclic or straight polyfluoropolyoxyalkylenes and at least a dyestuff of formula (III) or (IV) dissolved therein.Type: GrantFiled: February 11, 1992Date of Patent: May 11, 1993Assignee: Ausimont S.p.A.Inventors: Ezio Strepparola, Piero Gavezotti, Giovanni Gavazzi