Patents Assigned to Aktiebolaget Nynas Petroleum
  • Bitumen emulsion and its use
    Patent number: 5521235
    Abstract: A bitumen emulsion of the cationic type is disclosed which contains a thickener comprising at least one substance selected from the group consisting of associative thickeners of the nonionic type. The invention also relates to the use of a thickener of the above mentioned type as a thickener in a bitumen emulsion of the cationic type and the use of a bitumen emulsion containing a thickener as set forth above in road building, roofing and waterproofing.
    Type: Grant
    Filed: July 27, 1994
    Date of Patent: May 28, 1996
    Assignee: Aktiebolaget Nynas Petroleum
    Inventor: Gosta Redelius