Patents Assigned to Phobos N.V.
  • Process for the continuous production of high molecular weight polyester resin
    Patent number: 5243020
    Abstract: The intrinsic viscosities have been determined on a solution of 0,5 g. of polyester pellets into 100 ml. of solution phenol/tetrachloroethane with a weight ratio of 60:40 at a temperature of 25.degree. C. The free acetaldehyde content has been determined with gas chromatographic methods previously described in DE-OS 2834 162.The content of the acetaldehyde within the container ("head-space methods") has been determined using the method described in U.S. Pat. No. 4,764,323.
    Type: Grant
    Filed: June 12, 1991
    Date of Patent: September 7, 1993
    Assignee: Phobos N.V.
    Inventor: Guido Ghisolfi