Patents Assigned to Hoecst Celanese Corp.
  • Polarizer films with high thermal and hygroscopic stability
    Patent number: 5753145
    Abstract: This invention provides novel liquid crystalline polymers which, when blended with a suitable dye at a suitable high temperature and extruded, yields polarizer films with superior thermal and hygroscopic stability and polarizing efficiency. The invention further provides a process to prepare such polarizer films.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: May 19, 1998
    Assignee: Hoecst Celanese Corp.
    Inventors: Chia-Chi Teng, Hyun Nam Yoon, Mohammad Mortazavi