Patents by Inventor Mario Spataro

Mario Spataro 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).

  • Polypropylene compositions having improved impact strength properties at low temperatures and process for preparing same
    Patent number: 4521566
    Abstract: Polypropylene compositions having high impact strength at low temperatures comprising as essential components:100 parts by weight of polypropylene having an isotacticity index >90,8-25 parts by weight of an amorphous copolymeric fraction (1) of ethylene-propylene soluble in xylene at 23.degree. C., containing 20-80% by weight of ethylene,2-10 parts by weight of an ethylene-propylene crystalline copolymeric fraction (2) having a crystallinity of the polyethylene type containing 50-90% by weight of ethylene;and in which the weight ratio between the total polymerized ethylene and fraction (1) is <1.The compositions are prepared by polymerization processes comprising at least a step of homopolymerization of propylene to stereoregular polymer and a subsequent step of polymerization of ethylene-propylene mixtures in the presence of catalysts comprising a titanium compound carried on a magnesium halide in active form.
    Type: Grant
    Filed: October 13, 1982
    Date of Patent: June 4, 1985
    Assignee: Montedison S.p.A.
    Inventors: Paolo Galli, Mario Spataro