Making Film Or Tubes From Casein Patents (Class 264/DIG38)
  • Lustrous pigments for pigmenting casein plastics
    Patent number: 4128435
    Abstract: Pigmented substantially crack-free casein plastic compositions containing a minor, luster-imparting quantity of coated mica platelets, wherein at least 75% of the pigment particles possess an average platelet size of below 10 .mu.m., a thickness of about 0.1 to 0.7 .mu.m. and a ratio of diameter to thickness of about 10 to 200.
    Type: Grant
    Filed: June 24, 1977
    Date of Patent: December 5, 1978
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Wilhelm Baumer, Horst Bernhard, Reiner Esselborn, Jorg Ohngemach, Otto Stahlecker, Fritz Zureda