Patents Assigned to Ticonna GmbH
  • Process for the preparation of thermally stable polyoxymethylene copolymers
    Patent number: 5994455
    Abstract: A process for the preparation of polyoxymethylene copolymers, wherein 1,3,5-trioxane is polymerized with generally known comonomers in the presence of a strong protonic acid initiator and in the presence of a formaldehyde dialkyl acetal, and wherein the initiator is dissolved in the formaldehyde dialkyl acetal before admixing to the trioxane and the comonomers.
    Type: Grant
    Filed: September 8, 1998
    Date of Patent: November 30, 1999
    Assignee: Ticonna GmbH
    Inventors: Karl-Friedrich Muck, Horst Roschert, Robert M. Gronner, Satyajit Verma, Michael G. Yearwood