Patents by Inventor Antonio Cassata
Antonio Cassata 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: 4336360Abstract: There is disclosed a process for the stereoregular polymerization of alpha-olefins or mixtures thereof with ethylene, conducted in the presence of highly active and stereospecific new catalysts. The catalysts are obtained from the reaction of a particular Al-alkyl compound which is at least in part in the form of a complex and/or a substitution reaction product with an ester of an oxygenated organic or inorganic acid, with a supported component characterized by having surface area exceeding certain values or showing a particular X-rays spectrum, and obtained by contacting a Ti halogenated compound, preferably in the form of a complex with an electron-donor compound, with a support comprising a Mg or Mn bihalide in an activated condition. In the catalysts the ratio between the Ti compound, expressed in Ti g-atoms, and the g moles of the ester and the electron-donor compound, when present, is lower than 0.3.Type: GrantFiled: February 1, 1980Date of Patent: June 22, 1982Assignee: Montecatini Edison S.p.A.Inventors: Umberto Giannini, Antonio Cassata, Paolo Longi, Romano Mazzocchi
-
Patent number: 4226963Abstract: There is disclosed a process for the stereoregular polymerization of alpha olefins or mixtures thereof with ethylene conducted in the presence of highly active and stereospecific new catalysts. The catalysts are obtained from the reaction of a particular Al-alkyl compound which is at least in part in the form of a complex and/or a substitution reaction product with an electron-donor compound free from ester groups of oxygenated organic and inorganic acids, with a supported component characterized by having surface area exceeding certain values or by showing a particular X-rays spectrum and which is obtained by contacting a halogenated Ti compound, preferably in the form of a complex with an electron-donor compound, with a support comprising a Mg or Mn dihalide in an active state. In the catalysts the ratio between the Ti compound expressed in Ti g-atoms and the g-moles of the electron donor compounds is lower than 0.3.Type: GrantFiled: November 13, 1978Date of Patent: October 7, 1980Assignee: Montedison S.p.A.Inventors: Umberto Giannini, Antonio Cassata, Paolo Longi, Romano Mazzocchi
-
Patent number: 4187196Abstract: There is disclosed a process for the stereoregular polymerization of alpha-olefins or mixtures thereof with ethylene, conducted in the presence of highly active and stereospecific new catalysts. The catalysts are obtained from the reaction of a particular Al-alkyl compound which is at least in part in the form of a complex and/or a substitution reaction product with an ester of an oxygenated organic or inorganic acid, with a supported component characterized by having surface area exceeding certain values or showing a particular X-rays spectrum, and obtained by contacting a Ti halogenated compound, preferably in the form of a complex with an electron-donor compound, with a support comprising a Mg or Mn bihalide in an activated condition.In the catalysts the ratio between the Ti compound, expressed in Ti g-atoms, and the g moles of the ester and the electron-doner compound, when present, is lower than 0.3.Type: GrantFiled: October 30, 1978Date of Patent: February 5, 1980Assignee: Montedison S.p.A.Inventors: Umberto Giannini, Antonio Cassata, Paolo Longi, Romano Mazzocchi
-
Patent number: 4156063Abstract: There is disclosed a process for the stereoregular polymerization of alpha olefins or mixtures thereof with ethylene, conducted in the presence of highly active and stereospecific new catalysts. The catalysts are obtained from the reaction of a particular Al-alkyl compound which is at least in part in the form of a complex and/or a substitution reaction product with an ester of an oxygenated organic or inorganic acid, with a supported component characterized by having surface area exceeding certain values or by showing a particular X-rays spectrum, and obtained by contacting a Ti halogenated compound, preferably in the form of a complex with an electron-donor compound, with a support comprising a Mg or Mn bihalide.In the catalysts the ratio between the Ti compound, expressed in Ti g-atoms, and the g moles of the ester and the electron-donor compound, when present, is lower than 0.3.Type: GrantFiled: October 27, 1977Date of Patent: May 22, 1979Assignee: Montecanti Edison, S.p.A.Inventors: Umberto Giannini, Antonio Cassata, Paolo Longi, Romano Mazzocchi
-
Patent number: 4107413Abstract: There is disclosed a process for the stereoregular polymerization of alpha olefins or mixtures thereof with ethylene conducted in the presence of highly active and stereospecific new catalysts.The catalysts are obtained from the reaction of a component (A) which is a particular Al-alkyl compound that is at least in part in the form of an addition and/or a substitution reaction product with an electron-donor compound free from ester groups of oxygenated organic and inorganic acids, with a component (B) which is a supported component characterized by having surface area exceeding certain values or by showing a particular X-rays spectrum, and prepared by contacting a halogenated Ti compound, preferably in the form of a complex with an electron-donor compound, with a support comprising a Mg or Mn dihalide in an active state.In the catalysts the ratio between the Ti compound expressed in Ti g-atoms and the g-moles of the electron-donor compounds is lower than 0.3.Type: GrantFiled: March 21, 1977Date of Patent: August 15, 1978Assignee: Montedison S.p.A.Inventors: Umberto Giannini, Antonio Cassata, Paolo Longi, Romano Mazzocchi
-
Patent number: 4107414Abstract: There is disclosed a process for the stereoregular polymerization of alpha-olefins or mixtures thereof with ethylene, conducted in the presence of highly active and stereospecific new catalysts. The catalysts are obtained from the reaction of a particular Al-alkyl compound which is at least in part in the form of a complex and/or a substitution reaction product with an ester of an oxygenated organic or inorganic acid, with a supported component characterized by having surface area exceeding certain values or showing a particular X-rays spectrum, and obtained by contacting a Ti halogenated compound, preferably in the form of a complex with an electron-donor compound, with a support comprising a Mg or Mn bihalide.In the catalysts the ratio between the Ti compound, expressed in Ti g-atoms, and the g moles of the ester and the electron-donor compound, when present, is lower than 0.3.Type: GrantFiled: May 18, 1977Date of Patent: August 15, 1978Assignee: Montecatini Edison S.p.A.Inventors: Umberto Giannini, Antonio Cassata, Paolo Longi, Romano Mazzocchi
-
Patent number: 4107415Abstract: Alpha-olefins C.sub.3 -C.sub.6 are polymerized stereospecifically with the aid of catalysts obtained by mixing(a) a catalyst-forming component which is an addition and/or substitution product of an electron-donor compound (or a Lewis base) with an aluminum trialkyl, or an addition product of an electron-donor compound with an alkyl aluminum compound containing two or more Al - atoms bound to each other through an oxygen or nitrogen atom with(b) a supported catalyst-forming component which is the product obtained by contacting a titanium compound, preferably in the form of an addition product with an electron donor, with a carrier which is a mixture of an active anhydrous Mg or Mn dihalide and a solid organic material which is inert to all other components of the catalyst including the Mg or Mn dihalide carrier.Type: GrantFiled: March 18, 1977Date of Patent: August 15, 1978Assignee: Montecatini Edison S.p.A.Inventors: Umberto Giannini, Antonio Cassata, Paolo Longi, Romano Mazzocchi