Patents by Inventor Giulio Tommasi
Giulio Tommasi 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).
-
Patent number: 6767977Abstract: Semicrystalline sulphonic fluorinated ionomers having an equivalent weight higher than 700 g/eq, up to 1,700, comprising: (A) monomeric units deriving from one or more fluorinated monomers containing at least one ethylene unsaturation; (B) fluorinated monomeric units containing sulphonyl groups —SO2F in such amount to give the above equivalent weight, deriving from F2C═CF—O—(CF2)q—SO2F, q being an integer equal to 2 or 3; and having the following properties for a TFE/(B) copolymer: hydration, expressed in % of H2O at 100° C. absorbed by the film prepared from the ionomer and after tranformation from the —SO2F form into the —SO3H form, having the following values: at 750 EW higher than 55%, pref.Type: GrantFiled: December 20, 2002Date of Patent: July 27, 2004Assignee: Ausimont S.p.A.Inventors: Vincenzo Arcella, Alessandro Ghielmi, Giulio Tommasi
-
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
-
Publication number: 20030171444Abstract: Semicrystalline sulphonic fluorinated ionomers having an equivalent weight higher than 700 g/eq, up to 1,700, comprising:Type: ApplicationFiled: December 20, 2002Publication date: September 11, 2003Inventors: Vincenzo Arcella, Alessandro Ghielmi, Giulio Tommasi
-
Publication number: 20030130458Abstract: A polymerization process in aqueous emulsion of:Type: ApplicationFiled: December 20, 2002Publication date: July 10, 2003Inventors: Vincenzo Arcella, Alessandro Ghielmi, Giulio Tommasi
-
Patent number: 5177148Abstract: Covulcanizable compositions comprising (A) 55-100% by weight of an elastomeric copolymer of vinylidene fluoride with perfluoropropene optionally tetrafluoroethylene and containing from 0.001 to 2% by weight of bromine; (B) 0-45% by weight of a tetrafluoroethylene and propylene copolymer; (C) 0.7-2.5 parts for 100 parts of mix (A)+(B) of a bisphenol compound; (D) 0.3-1.5 parts for 100 parts of mix (A)+(B) of an organic guaternary compound of ammonium, phosphonium or aminophosphonium; (E) 0.4-5 parts for 100 parts of mix (A)+(B) of an organic peroxide; (F) 1-5% by weight of (A)+(B) of a peroxide cross-linking coagent.Type: GrantFiled: August 23, 1990Date of Patent: January 5, 1993Assignee: Ausimont S.p.A.Inventors: Vincenzo Arcella, Giulio Tommasi, Giulio Brinati, Gianna Cirillo, Fabio Costanzi
-
Patent number: 5155282Abstract: New perfluoropolyethers comprising repeating units chosen from among ##STR1## statistically distributed along the chain, having a controlled molecular weight and brominated end groups, prepared starting from the product of the photochemical oxidation of C.sub.2 F.sub.4, and/or C.sub.3 F.sub.6, containing peroxidic oxygen, and subsequent treatment in liquid phase with bromine, at temperatures ranging from -40.degree. to 130.degree. C. in the presence of ultraviolet radiations, said new perfluoropolyethers derivatives being useful as additives in rubber mixes vulcanizable with peroxides, in amounts of 0.01 to 5 parts by w per 100 parts by weight of elastomer, optionally in combination with non brominated perfluoropolyethers, to improve the processability in the extrusion and the detachability of the vulcanized articles from the molding.Type: GrantFiled: October 30, 1990Date of Patent: October 13, 1992Assignees: Ausimont S.p.A., Montedison S.p.A.Inventors: Giuseppe Marchionni, Gian T. Viola, Giulio Tommasi, Raffaele Ferro, Gianna Cirillo
-
Patent number: 5061759Abstract: The use of liquid neutral perfluoropolyethers in amounts below 1 part by weight per 100 parts by weight of elastomer, and of derivatives thereof having brominated end groups, in amounts of 0.01 to 5 parts by weight per 100 parts by weight of elastomer, having a molecular weight ranging from 500 to 10,000, as additives in rubber mixes vulcanizable with peroxides, in order to improve the processability in the extrusion and the detachability of the vulcanized article from the molding dies.Type: GrantFiled: March 28, 1991Date of Patent: October 29, 1991Assignee: Ausimont S.p.A.Inventors: Giulio Tommasi, Raffaele Ferro, Gianna Cirillo
-
Patent number: 5045143Abstract: Metal-fluoroelastomer composites constituted by a metal part and by a cured fluoroelastomer part bonded to each other with high adhesion strength, wherein the fluoroelastomeric part is constituted by a copolymer containing from 35 to 80 mol % T of vinylidene fluoride, from 15 to 35 mol % of hexafluoropropene, from 0 to 30 mol % of another comonomer selected from fluoro-olefins and/or perfluorovinyl ethers, and from 0.001 to 2 wt. % of bromine.Type: GrantFiled: October 16, 1989Date of Patent: September 3, 1991Assignee: Ausimont S.p.A.Inventors: Vincenzo Arcella, Raffaele Ferro, Giulio Tommasi
-
Patent number: 5026786Abstract: New perfluoropolyethers comprising repeating units chosen from among ##STR1## statistically distributed along the chain, having a controlled molecular weight and brominated end groups, prepared starting from the product of the photochemical oxidation of C.sub.2 F.sub.4, and/or C.sub.3 F.sub.6, containing peroxidic oxygen, and subsequent treatment in liquid phase with bromine, at temperatures ranging from -40 to 130.degree. C. with the presence of ultraviolet radiations, said new perfluoropolyethers derivatives being useful as additives in rubber mixes vulcanizable with peroxides, in amounts of 0.01 to 5 parts by w per 100 parts by weight of elastomer, optionally in combination with non brominated perfluoropolyethers to improve the processability in the extrusion and the detachability of the vulcanized articles from the molding.Type: GrantFiled: September 30, 1988Date of Patent: June 25, 1991Assignees: Ausimont S.p.A., Montedison S.p.A.Inventors: Giuseppe Marchionni, Gian T. Viola, Giulio Tommasi, Raffaele Ferro, Gianna Cirillo
-
Patent number: 4745165Abstract: Process for the preparation of curable fluoroelastomers comprising reacting form 35 to 80 mol % of vinylidene fluoride, from 15 to 35 mol % of hexafluoropropene, from 0 to 30 mol % of another comonomer selected from fluoroolefins and/or perfluorovinyl ethers and from 0.01 to 1 mol % of a brominated fluorovinyl ether having general formula:CF.sub.2 BR--(R.sub.f).sub.n --O--CF.dbd.CF.sub.2wherein R.sub.f is a fluorinated alkylene radical containing from 1 to 9 carbon atoms and n can be either 0 or 1, in the presence of a known polymerization initiator for fluoroelastomers, and of small amounts of a chain-transfer agent having general formula:R--(CF.sub.2 Br).sub.mwherein m is either 1 or 2; when m is 1, R can be either bromine or a perfluoroalkyl radical of 2 to 4 carbon atoms containing a bromine atom bonded to a secondary carbon atom; and when m is 2, R is an alkylene radical of up to 4 carbon atoms containing a bromineatom bonded to a secondary carbon atom.Type: GrantFiled: July 7, 1986Date of Patent: May 17, 1988Assignee: Ausimont S.p.A.Inventors: Vincenzo Arcella, Giulio Brinati, Piergiorgio Bonardelli, Giulio Tommasi
-
Patent number: 4246236Abstract: Apparatus is disclosed for the carrying out of gaseous phase reactions, illustrated by way of example by the preparation of sulphur hexafluoride of high purity, starting from elemental fluorine and sulphur, both in gaseous phase. One of the gaseous reactants, e.g., the fluorine, is fed into a reaction chamber through inlets in a metal plate, maintained at between 30.degree. and 70.degree. C. while the other, e.g., sulphur in gaseous phase, is fed in through the nozzle of a burner, e.g., by regulating a current of an inert gas which is saturated with sulphur by passing same through a zone containing molten sulphur at a temperature between 250.degree. and 500.degree. C., and subsequently superheating the inert gas thus saturated with sulphur to a temperature between 300.degree. and 550.degree. C.Type: GrantFiled: June 12, 1979Date of Patent: January 20, 1981Assignee: Montedison S.p.A.Inventors: Alberto Di Gioacchino, Giulio Tommasi, Mario de Manuele
-
Patent number: 4186180Abstract: Process and apparatus are disclosed for the preparation of sulphur hexafluoride of high purity, starting from elemental fluorine and sulphur, both in gaseous phase, and operating with an excess of fluorine, characterized in that the fluorine is fed into a reaction chamber through inlets in a metal plate, maintained at between 30.degree. and 70.degree. C., while the sulphur is fed in through the nozzle of a burner, by regulating a current of an inert gas which is saturated with sulphur by passing same through a zone containing molten sulphur at a temperature between 250.degree. and 500.degree. C., and subsequently superheating the inert gas thus saturated with sulphur to a temperature between 300.degree. and 550.degree. C.Type: GrantFiled: April 17, 1978Date of Patent: January 29, 1980Assignee: Montedison S.p.A.Inventors: Alberto Di Gioacchino, Giulio Tommasi, Mario de Manuele