Patents by Inventor Stefano Saccardi

Stefano Saccardi 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).

  • Thermodegradable compositions based on crystalline homo- or copolymers of propylene and process for carrying out the selective degradation of such homo- and copolymers
    Patent number: 4948820
    Abstract: Selective thermodegradation of homo- and copolymers of propylene, without encountering thermo-oxidation phenomena, by treating the polymer at 250.degree.-350.degree. C. in the presence of primary and/or secondary antioxidant and of a derivative of benzopinacol having formula (I): ##STR1## wherein n=1, or=0, and when n=1, X may be=1, and in this case Z.sub.1 and Z.sub.2 form together with each other ##STR2## groups, ##STR3## wherein R.sub.1, R.sub.2, R.sub.3, which may be the same or different, are alkyl or aryl radicals;or X ranges from 3 to 20 and in this case Z.sub.1 and Z.sub.2 are aryl radicals, A and B are R.sub.1 -Si-R.sub.2 groups that are part of an oligomer having formula: ##STR4## and when n=0, X is=1, Z.sub.1 and Z.sub.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: August 14, 1990
    Assignee: Montedipe S.p.A.
    Inventors: Antonio Addeo, Annibale Vezzoli, Stefano Saccardi, Corrado Brichta