Patents by Inventor Davide Privitera
Davide Privitera 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: 11732114Abstract: A rubber compound for the production of tire portions comprising a polymer base with a cross-linkable unsaturated chain, a filler system and a vulcanization system. The filler system comprises (a) a quantity, greater than or equal to 25 phr, of a first carbon black having a surface area smaller than or equal to 170 m2/gr; (b) a second carbon black having a surface area greater than or equal to 300 m2/gr in a quantity that is such that the ratio between the quantity of said first carbon black and the quantity of said second carbon black is greater than or equal to 5 and smaller than or equal to 13; (c) a quantity ranging between 0.5 and 2.0 phr of a dispersant agent comprised in the class of aromatic amides and having an unsaturation suited to interact with the polymer base with a cross-linkable unsaturated chain.Type: GrantFiled: September 17, 2019Date of Patent: August 22, 2023Assignee: Bridgestone Europe NV/SAInventors: Gianpaolo Chieffi, Aya Saiki, Davide Privitera
-
Patent number: 11555102Abstract: A rubber compound for the preparation of portions of pneumatic tyres comprising a cross-linking unsaturated chain polymer base, a filler system and a vulcanization system. The filler system comprises (a) a first carbon black having a surface area less than or equal to 170 m2/gr in a quantity greater than or equal to 25 phr; (b) a second carbon black having a surface area greater than or equal to 250 m2/gr in a quantity such that the ratio between the quantity of the first carbon black and the quantity of the second carbon black is greater than or equal to 3 and less than or equal to 10; (c) a carbon black dispersing agent in a quantity of less than or equal to 1 phr.Type: GrantFiled: November 19, 2018Date of Patent: January 17, 2023Assignee: Bridgestone Europe NV/SAInventors: Davide Privitera, Giampaolo Chieffi, Raffaele Di Ronza
-
Publication number: 20210347967Abstract: A rubber compound for the production of tire portions comprising a polymer base with a cross-linkable unsaturated chain, a filler system and a vulcanization system. The filler system comprises (a) a quantity, greater than or equal to 25 phr, of a first carbon black having a surface area smaller than or equal to 170 m2/gr; (b) a second carbon black having a surface area greater than or equal to 300 m2/gr in a quantity that is such that the ratio between the quantity of said first carbon black and the quantity of said second carbon black is greater than or equal to 5 and smaller than or equal to 13; (c) a quantity ranging between 0.5 and 2.0 phr of a dispersant agent comprised in the class of aromatic amides and having an unsaturation suited to interact with the polymer base with a cross-linkable unsaturated chain.Type: ApplicationFiled: September 17, 2019Publication date: November 11, 2021Inventors: Gianpaolo Chieffi, Aya Saiki, Davide Privitera
-
Publication number: 20200277472Abstract: A rubber compound for the preparation of portions of pneumatic tyres comprising a cross-linking unsaturated chain polymer base, a filler system and a vulcanization system. The filler system comprises (a) a first carbon black having a surface area less than or equal to 170 m2/gr in a quantity greater than or equal to 25 phr; (b) a second carbon black having a surface area greater than or equal to 250 m2/gr in a quantity such that the ratio between the quantity of the first carbon black and the quantity of the second carbon black is greater than or equal to 3 and less than or equal to 10; (c) a carbon black dispersing agent in a quantity of less than or equal to 1 phr.Type: ApplicationFiled: November 19, 2018Publication date: September 3, 2020Inventors: Davide Privitera, Giampaolo Chieffi, Raffaele Di Ronza
-
Publication number: 20170305191Abstract: A reinforcing ply for tires made from a textile material and/or a metallic material and suitable for being incorporated into a body ply skim layer. The ply is at least partially coated with a reinforcing composition comprising polyethylene glycol in which calcium carbonate and/or silica is dispersed.Type: ApplicationFiled: April 18, 2017Publication date: October 26, 2017Inventors: Roberto LOMBARDI, Davide PRIVITERA
-
Patent number: 9644085Abstract: A method of producing rubber compounds, in which the polymer base is composed partly of a first polymer material having a glass transition temperature of over ?50° C., and partly of a second polymer material having a glass transition temperature of below ?50° C. and silica as a filler. The method includes a preliminary first polymer material treating step, in which the first polymer material, a silica having a surface area of 80 to 135 m2/g, a silane bonding agent, and at least one nucleophile agent are mixed together; a preliminary second polymer material treating step, in which the second polymer material, a silica having a surface area of 150 to 220 m2/g, a silane bonding agent, and at least one nucleophile agent are mixed together; a mixing step, in which the compounds resulting from the preliminary treating steps are mixed together; and a final step, in which stearic acid and a curing system are added and mixed with the compound being produced.Type: GrantFiled: July 8, 2014Date of Patent: May 9, 2017Assignee: BRIDGESTONE CORPORATIONInventors: Francesco Botti, Riccardo Ascione, Davide Privitera, Michele Amurri, Pasquale Agoretti
-
Patent number: 9598559Abstract: A method of producing rubber compounds, in which the polymer base is composed partly of a first polymer material, which is either produced by emulsion polymerization or is natural rubber, and partly of a second polymer material produced by solution polymerization. The method includes a preliminary second polymer material treating step, in which the second polymer material, silica, a silane bonding agent, and at least one nucleophile agent are mixed with one another; a first mixing step, in which at least the first polymer material, silica, and a silane bonding agent are added to the compound resulting from the preliminary second polymer material treating step; and a second mixing step, in which stearic acid and a curing system are added to the compound being produced.Type: GrantFiled: July 18, 2014Date of Patent: March 21, 2017Assignee: BRIDGESTONE CORPORATIONInventors: Pasquale Agoretti, Davide Privitera
-
Patent number: 9518174Abstract: A rubber compound production method including a first mixing step wherein at least one cross-linkable unsaturated-chain polymer base, silica, and a silane bonding agent in the alkoxymercaptoalkyl-silane class are mixed together; and a following mixing step wherein a curing system having at least sulphur and accelerants is added and mixed to the compound being produced. 0.2 to 5 phr of an accelerant, and 0.5 to 6 phr of a zinc salt of a fatty acid with a carbon atom number of C8 to C24 are added at the first mixing step. The accelerant is from the group of benzothiazyl-cyclohexyl-sulphenamide (CBS), benzothiazole disulphide (MBTS), N-tert-butyl-2-benzothiazylsulphenamide (TBBS), 2-mercaptobenzothiazole (MBT), zinc salts of 2-mercaptobenzothiazole (ZMBT), benzothiazyl-2-dicyclohexyl-sulphenamide (DCBS), diphenylguanidine (DPG), triphenylguanidine (TPG), diorthotolyl guanidine (DOTG), o-tolylbiguanidine (OTBG), ethylene thiourea (ETU) and their mixtures.Type: GrantFiled: October 29, 2013Date of Patent: December 13, 2016Assignee: BRIDGESTONE CORPORATIONInventors: Riccardo Ascione, Davide Privitera
-
Publication number: 20160145424Abstract: A method of producing rubber compounds, in which the polymer base is composed partly of a first polymer material having a glass transition temperature of over ?50° C., and partly of a second polymer material having a glass transition temperature of below ?50° C. and silica as a filler. The method includes a preliminary first polymer material treating step, in which the first polymer material, a silica having a surface area of 80 to 135 m2/g, a silane bonding agent, and at least one nucleophile agent are mixed together; a preliminary second polymer material treating step, in which the second polymer material, a silica having a surface area of 150 to 220 m2/g, a silane bonding agent, and at least one nucleophile agent are mixed together; a mixing step, in which the compounds resulting from the preliminary treating steps are mixed together; and a final step, in which stearic acid and a curing system are added and mixed with the compound being produced.Type: ApplicationFiled: July 8, 2014Publication date: May 26, 2016Applicant: BRIDGESTONE CORPORATIONInventors: Pasquale AGORETTI, Michele AMURRI, Riccardo ASCIONE, Francesco BOTTI, Davide PRIVITERA
-
Publication number: 20160145418Abstract: A method of producing rubber compounds, in which the polymer base is composed partly of a first polymer material, which is either produced by emulsion polymerization or is natural rubber, and partly of a second polymer material produced by solution polymerization. The method includes a preliminary second polymer material treating step, in which the second polymer material, silica, a silane bonding agent, and at least one nucleophile agent are mixed with one another; a first mixing step, in which at least the first polymer material, silica, and a silane bonding agent are added to the compound resulting from the preliminary second polymer material treating step; and a second mixing step, in which stearic acid and a curing system are added to the compound being produced.Type: ApplicationFiled: July 18, 2014Publication date: May 26, 2016Applicant: BRIDGESTONE CORPORATIONInventors: Pasquale AGORETTI, Davide PRIVITERA
-
Publication number: 20150284549Abstract: A rubber compound production method including a first mixing step wherein at least one cross-linkable unsaturated-chain polymer base, silica, and a silane bonding agent in the alkoxymercaptoalkyl-silane class are mixed together; and a following mixing step wherein a curing system having at least sulphur and accelerants is added and mixed to the compound being produced. 0.2 to 5 phr of an accelerant, and 0.5 to 6 phr of a zinc salt of a fatty acid with a carbon atom number of C8 to C24 are added at the first mixing step. The accelerant is from the group of benzothiazyl-cyclohexyl-sulphenamide (CBS), benzothiazole disulphide (MBTS), N-tert-butyl-2-benzothiazylsulphenamide (TBBS), 2-mercaptobenzothiazole (MBT), zinc salts of 2-mercaptobenzothiazole (ZMBT), benzothiazyl-2-dicyclohexyl-sulphenamide (DCBS), diphenylguanidine (DPG), triphenylguanidine (TPG), diorthotolyl guanidine (DOTG), o-tolylbiguanidine (OTBG), ethylene thiourea (ETU) and their mixtures.Type: ApplicationFiled: October 29, 2013Publication date: October 8, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Riccardo Ascione, Davide Privitera
-
Patent number: 9023952Abstract: A method of producing a rubber compound, which includes mixing at least one cross-linkable unsaturated-chain polymer base, silica with a surface area of 100-220 m2/g, a first silane coupling agent in the polysulphide organosilane class, and a second silane coupling agent in the class of mercaptosilane protected in the form of thioester, and whereby the second silane coupling agent is added to the mix after the first silane coupling agent has reacted with the silica.Type: GrantFiled: December 23, 2011Date of Patent: May 5, 2015Assignee: Bridgestone CorporationInventors: Francesco Botti, Davide Privitera
-
Publication number: 20130331523Abstract: A method of producing a rubber compound, including a first mixing step of mixing at least one cross-linkable unsaturated-chain polymer base, silica, and a silane coupling agent in the mercaptoalkyl-silane class; and a final mixing step, in which a curing system is added to the mix. The silane coupling agent is used in adsorbed form on dibenzothiazyl disulphide.Type: ApplicationFiled: December 23, 2011Publication date: December 12, 2013Applicant: BRIDGESTONE CORPORATIONInventor: Davide Privitera
-
Publication number: 20130310483Abstract: A method of producing a rubber compound, which includes mixing at least one cross-linkable unsaturated-chain polymer base, silica, a first type of silane coupling agent, and a second type of silane coupling agent. The second type of silane coupling agent is added to the mix after the first type of silane coupling agent has reacted with the silica. The first type of silane coupling agent is a trialkoxymercaptoalkyl-silane, and the second type of silane coupling agent is a mercaptosilane protected in the form of thioester.Type: ApplicationFiled: December 23, 2011Publication date: November 21, 2013Applicant: BRIDGESTONE CORPORATIONInventors: Francesco Botti, Veronica Cantonetti, Davide Privitera
-
Publication number: 20130303706Abstract: A method of producing a rubber compound, which includes mixing at least one cross-linkable unsaturated-chain polymer base, silica with a surface area of 100-220 m2/g, a first silane coupling agent in the polysulphide organosilane class, and a second silane coupling agent in the class of mercaptosilane protected in the form of thioester, and whereby the second silane coupling agent is added to the mix after the first silane coupling agent has reacted with the silica.Type: ApplicationFiled: December 23, 2011Publication date: November 14, 2013Applicant: BRIDGESTONE CORPORATIONInventors: Francesco Botti, Davide Privitera
-
Patent number: 8420723Abstract: A method of producing a tire mix, including a first mixing step, in which a mix contains at least one cross-linkable unsaturated-chain polymer base, 10 to 100 phr of silica, and 1 to 20 phr of a silane bonding agent in the trialkoxymercaptoalkyl-silane class; and a final mixing step, in which a curing system is added to the mix. The silane bonding agent is used in adsorbed form on 0.5 to 2 phr of zinc oxide, and on 5 to 15 phr of carbon black. At the first mixing step, the mix contains 1 to 5 phr of one or more fatty acid derivatives, and, at the final mixing step, 1 to 2 phr of zinc oxide is added to the mix. The fatty acid derivatives are derived from condensation of a fatty acid, having a carbon number of 16 to 20, with an alcohol having a carbon number of 2 to 6, or with a primary or secondary amine having a carbon number of 2 to 6.Type: GrantFiled: January 23, 2009Date of Patent: April 16, 2013Assignee: Bridgestone CorporationInventors: Raffaele Di Ronza, Davide Privitera
-
Publication number: 20120296008Abstract: A tread mix comprising a cross-linkable unsaturated-chain polymer base; curing agents; silica; and a silane bonding agent; said mix being characterized in that said polymer base comprises a first SBR rubber comprising 20-40% of a first fraction with a mean molecular weight of 50-100×103 and a molecular weight distribution of <1.5, and 80-60% of a second fraction with a mean molecular weight of 800-1500×103 and a molecular weight distribution of <3.0; and in that said silane bonding agent is a mercaptosilane of formula I: SH(CH2)1SiR1R22??(I) where: 1 is an integer of 1 to 6, R2 is —O(CH2)gCH3, R2 is —O(CH2CH2O)m(CH2)nCH3, g is an integer of 0 to 5, m is an integer of 2 to 8, and n is an integer of 3 to 20.Type: ApplicationFiled: November 10, 2010Publication date: November 22, 2012Applicant: BRIDGESTONE CORPORATIONInventors: Raffaele Di Ronza, Davide Privitera
-
Publication number: 20110021662Abstract: A method of producing a tyre mix, including a first mixing step, in which a mix contains at least one cross-linkable unsaturated-chain polymer base, 10 to 100 phr of silica, and 1 to 20 phr of a silane bonding agent in the trialkoxymercaptoalkyl-silane class; and a final mixing step, in which a curing system is added to the mix. The silane bonding agent is used in adsorbed form on 0.5 to 2 phr of zinc oxide, and on 5 to 15 phr of carbon black. At the first mixing step, the mix contains 1 to 5 phr of one or more fatty acid derivatives, and, at the final mixing step, 1 to 2 phr of zinc oxide is added to the mix. The fatty acid derivatives are derived from condensation of a fatty acid, having a carbon number of 16 to 20, with an alcohol having a carbon number of 2 to 6, or with a primary or secondary amine having a carbon number of 2 to 6.Type: ApplicationFiled: January 23, 2009Publication date: January 27, 2011Applicant: BRIDGESTONE CORPORATIONInventors: Raffaele Di Ronza, Davide Privitera