Patents by Inventor Nicoletta Maurizi

Nicoletta Maurizi 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).

  • Catalytic preparation of semi-aromatic copolyamides and copolyester-amides
    Patent number: 5219953
    Abstract: Semi-aromatic copolyamides and copolyester-amides are obtained by placing an aliphatic polyamide into contact with an aromatic hydroxyacid or aminoacid, by operating at high temperature, under melting conditions, possibly in the presence of a catalyst, with a ratio of the monomer units of aliphatic polyamide to the mols of aromatic hydroxyacid or aminoacid comprised within the range of from 20:1 to 1:1.The semiaromatic copolyamides and copolyester-amides so obtained can display a thermotropic liquid-crystal behavior as a function of their content of aromatic units linked inside the molecular chain. Their elastic modulus results to be improved relatively to the alifatic polyamides used as the starting product, and the elongation at break results to be decreased.Such semiaromatic polyamides and copolyester-amides can find application in the production of high-stiffness articles, by means of moulding or extrusion processes.
    Type: Grant
    Filed: October 30, 1990
    Date of Patent: June 15, 1993
    Assignee: Eniricerche S.p.A.
    Inventors: Ming-de Liu, Bruno Bresci, Pier L. Magagnini, Nicoletta Maurizi, Ugo Pedretti, Arnaldo Roggero
  • Semi-aromatic copolyamide or copolyester-amide prepared from aliphatic polyamide
    Patent number: 5070155
    Abstract: Semi-aromatic copolyamides and copolyester-amides are obtained by placing an aliphatic polyamide into contact with an aromatic hydroxyacid or aminoacid, by operating at high temperature, under melting conditions, possibly in the presence of a catalyst, with a ratio of the monomer units of aliphatic polyamide to the mols of aromatic hydroxyacid or aminoacid comprised within the range of from 20:1 to 1:1.The semiaromatic copolyamides and copolyester-amides so obtained can display a thermotropic liquid-crystal behaviour as a function of their content of aromatic units linked inside the molecular chain. Their elastic modulus results to be improved relatively to the alifatic polyamides used as the starting product, and the elongation at break results to be decreased.Such semiaromatic polyamides and copolyester-amides can find application in the production of high-stiffness articles, by means of moulding or extrusion processes.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: December 3, 1991
    Assignee: Eniricerche, S.p.A.
    Inventors: Ming-de Liu, Bruno Bresci, Pier L. Magagnini, Nicoletta Maurizi, Ugo Pedretti, Arnaldo Roggero