Patents by Inventor Marina Zani

Marina Zani 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 producing glossy fibres of the modacrylic type having reduced inflammability
    Patent number: 4287148
    Abstract: Modacrylic fibres from acrylonitrile, vinylidene chloride, and a sulphonated comonomer, having reduced inflammability and high glossiness and dye yield are prepared by wet spinning a polyblend obtained by mixing two binary copolymers, the first from acrylonitrile and the sulphonated comonomer, and the second from acrylonitrile and vinylidene chloride. As the sulphonated comonomer, a significantly homopolymerizable monomer is used, viz. a monomer which homopolymerizes with a conversion of at least 30-40% by weight, in the presence of azobisisobutyronitrile catalyst, under given standard reaction conditions. Preferred sulphonated monomers are acid or salts of the acrylamidoalkanesulphonic series. The spinning dope is a polyblend solution in an organic solvent chosen among dimethylformamide, dimethylacetamide, and dimethylsulphoxide, mixed with water.
    Type: Grant
    Filed: April 23, 1980
    Date of Patent: September 1, 1981
    Assignee: Snia Viscosa
    Inventors: Giorgio Cazzaro, Giancarlo Matera, Antonino Cavallaro, Marina Zani
  • Glossy fibres of the modacrylic type having reduced inflammability, and compositions of matter and process for producing the same
    Patent number: 4223108
    Abstract: Modacrylic fibres from acrylonitrile, vinylidene chloride, and a sulphona comonomer, having reduced inflammability and high glossiness and dye yield are prepared by wet spinnning a polybend obtained by mixing two binary copolymers, the first from acrylonitrile and the sulphonated comonomer, and the second from acrylonitrile and vinylidene chloride. As the sulphonated comonomer, a significantly homopolymerizable monomer is used, viz. a monomer which homopolymerizes with a conversion of at least 30-40% by weight, in the presence of azobisisobutyronitrile catalyst, under given standard reaction conditions. Preferred sulphonated monomers are acid or salts of the acrylamidoalkanesulphonic series. The spinning dope is a polyblend solution in an organic solvent chosen among dimethylformamide, dimethylacetamide, and dimethylsulphoxide, mixed with water.
    Type: Grant
    Filed: November 2, 1977
    Date of Patent: September 16, 1980
    Assignee: SNIA VISCOSA Societa' Nazionale Industria Applicazioni Viscosa S.p.A.
    Inventors: Giorgio Cazzaro, Giancarlo Matera, Antonino Cavallaro, Marina Zani