Patents by Inventor Maria Caldararo

Maria Caldararo 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).

  • Process for the preparation of block copolymers
    Patent number: 7388052
    Abstract: Process for the preparation of block copolymers, based on vinylaromatic monomers and monomers deriving from (meth)acrylic acid by means of radicalic polymerization which comprises polymerizing the monomers at a temperature higher than or equal to 120° C.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: June 17, 2008
    Assignee: Polimeri Europa S.p.A.
    Inventors: Riccardo Po, Nicoletta Cardi, Giuliana Schimperna, Aldo Longo, Maria Caldararo
  • Perfected Process for the Preparation of Stable Nitroxide Radicals
    Publication number: 20070282113
    Abstract: Process for the preparation of stable nitroxide radicals (I) starting from N-benzylphthalimide in three steps. In the first step, the N-benzylphthalimide is transformed into N-benzyl-1,1,3,3-tetralkylisoindoline by treatment with a Grignard reagent prepared in methyl-tert-butyl ether In the second step, the N-benzyl-1,1,3,3-tetraalkylisoindoline is transformed into 1,1,3,3-tetra-alkylisoindoline by hydrogenolysis. In the third step, the 1,1,3,3-tetra-alkyl-isoindoline is transformed into the nitroxide radical by oxidation with hydrogen peroxide in the presence of a catalyst selected from acids and salts of polymolybdic or polytungstic acids.
    Type: Application
    Filed: August 25, 2005
    Publication date: December 6, 2007
    Applicant: POLIMERI EUROPA S.p.A.
    Inventors: Maria Caldararo, Riccardo Po, Marco Ricci
  • Process for the preparation of block copolymers
    Publication number: 20070219329
    Abstract: Process for the preparation of block copolymers, based on vinylaromatic monomers and monomers deriving from (meth)acrylic acid by means of radicalic polymerization which comprises polymerizing the monomers at a temperature higher than or equal to 120° C., in the presence of a radicalic initiating system comprising a compound having general Formula (I).
    Type: Application
    Filed: June 26, 2003
    Publication date: September 20, 2007
    Applicant: POLIMERI EUROPA S.p.A.
    Inventors: Riccardo Po, Nicoletta Cardi, Giuliana Schimperna, Aldo Longo, Maria Caldararo
  • Process for the preparation of 1,1,3,3-tetraalkylisoindoline starting from n-benzylphthalimide
    Publication number: 20070015922
    Abstract: Process for the preparation of 1,1,3,3-tetra-alkyl derivatives of isoindoline which comprises the transformation of N-benzylphthalimide into N-benzyl-1,1,3,3-tetra-alkylisoindoline by means of treatment with a Grignard reagent prepared in methyl-tert-butyl ether starting from magnesium and an alkyl halide and subjecting the intermediate thus obtained to a hydrogenolysis reaction in the presence of hydrogen and a catalyst based on supported palladium.
    Type: Application
    Filed: March 1, 2004
    Publication date: January 18, 2007
    Applicant: POLIMERI EUROPA S.p.A.
    Inventors: Maria Caldararo, Riccardo Po, Marco Ricci, Giuliana Schimperna, Nicoletta Cardi
  • Bridged metallocene compounds as olefin-polymerization catalysts
    Patent number: 6984703
    Abstract: The present invention relates to metallocene compounds consisting of indenyl-cyclopentadienyl groups non-symmetrically joined by a bivalent radical. Said compounds can be conveniently used as components of catalysts for the polymerization of olefins.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: January 10, 2006
    Assignee: Polimeri Europa S.p.A.
    Inventors: Paolo Biagini, Roberto Santi, Giuliana Schimperna, Maria Caldararo, Giampietro Borsotti, Francesco Masi
  • Organic initiators and their use in the polymerization of unsaturated monomers
    Patent number: 6576730
    Abstract: Process for the polymerization of unsaturated vinyl and/or vinylidene monomers which comprises reacting one or more monomers in the presence of heterocyclic initiators having a nitrogen atom bound to an oxygen atom at a temperature ranging from 100 to 130° C.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: June 10, 2003
    Assignee: Enichem S.p.A.
    Inventors: Nicoletta Cardi, Riccardo Po', Giuliana Schimperna, Maria Caldararo, Maria Anna Cardaci, Fabio Garbassi
  • Organic initiators and their use in the polymerization of unsaturated monomers
    Publication number: 20020022724
    Abstract: Process for the polymerization of unsaturated vinyl and/or vinylidene monomers which comprises reacting one or more monomers in the presence of heterocyclic initiators having a nitrogen atom bound to an oxygen atom at a temperature ranging from 100 to 130° C.
    Type: Application
    Filed: May 11, 2001
    Publication date: February 21, 2002
    Applicant: ENICHEM S.p.A.
    Inventors: Nicoletta Cardi, Riccardo Po', Giuliana Schimperna, Maria Caldararo, Maria Anna Cardaci, Fabio Garbassi
  • Polyolefins modified with an unsaturated polyfunctional monomer containing an imide group and an ester group
    Patent number: 5817720
    Abstract: Polyolefins modified by radical grafting with an unsaturated polyfunctional compound containing an imide group and an ester group having general formula (I): ##STR1##
    Type: Grant
    Filed: February 11, 1997
    Date of Patent: October 6, 1998
    Assignee: Enichem S.p.A.
    Inventors: Giuliana Schimperna, Maria Antonella Pastorino, Maria Caldararo, Francesco Toscani, Maurizio Sguaita