Patents Assigned to M. & G. Richerche S.p.A.
  • Foamed cellular polyester resins and process for their preparation
    Patent number: 5422381
    Abstract: A foamed cellular material from polyester resins is obtained by extrusion foaming of polyester resins having melt strength higher than 8 centinewton, intrinsic viscosity greater than 0.8 dl/g and complex melt viscosity higher than 25,000 poises.
    Type: Grant
    Filed: July 14, 1994
    Date of Patent: June 6, 1995
    Assignee: M. & G. Richerche S.p.A.
    Inventors: Hussain A. K. Al Ghatta, Tonino Severini, Luca Astarita