Patents Assigned to Unibra S.A.
  • Crystallization of polycarbonates
    Patent number: 4082715
    Abstract: A moulding composition which comprises a polycarbonate polymer, a plasticizer for said polymer, and a finely divided nucleating agent selected from the group consisting of metal salts of polymers carrying lateral carboxylic groups.
    Type: Grant
    Filed: November 13, 1975
    Date of Patent: April 4, 1978
    Assignee: Unibra S.A.
    Inventor: Jean-Pierre Mercier
  • Process for the crystallization of polycarbonates and products obtained
    Patent number: 3965064
    Abstract: The invention concerns a process for crystallizing a polycarbonate polymer which consists in incorporating to said polycarbonate polymer a finely divided nucleating agent and/or a plasticizer for said polycarbonate polymer, and crystallizing the mixture thus obtained at a temperature higher than the vitreous transition temperature.The semi-crystalline polymer material obtained can be reinforced by adding inorganic fibers.
    Type: Grant
    Filed: October 29, 1974
    Date of Patent: June 22, 1976
    Assignee: Unibra S.A.
    Inventors: Jean Mercier, Francis Gallez, Roger Legras