Patents by Inventor Vincenzo Ruoti

Vincenzo Ruoti 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 production of high viscosity polyamide by adding alkylene carbonate to molten polyamide
    Patent number: 4101532
    Abstract: Polyamide compositions having a high viscosity in the molten state are prced by preparing a polyamide, adding to the polyamide while the same is in the molten state, an alkylene carbonate in an amount from 0.1 to 2% by weight, and preferably from 0.4 to 0.9% by weight of the polyamide, and extruding the resulting composition. The alkylene carbonate containing polyamide composition may be dried under reduced pressures at temperatures comprised between 110.degree. and 210.degree. C. The preferred polyamide is polyamide-6 (polycapronamide) and the preferred alkylene carbonates are propylene and ethylene carbonates. The resulting compositions can be made into chips suitable for processing by known extrusion and molding techniques.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: July 18, 1978
    Assignee: SNIA VISCOSA Societa Nazionale Industria Applicazioni Viscosa S.p.A.
    Inventors: Vincenzo Ruoti, Felice Farioli