Patents Assigned to Kranton Chemical, LLC
  • Patent number: 9940852
    Abstract: Rosin esters are provided. The rosin esters can exhibit improved color (e.g., the rosin ester can have a neat Gardner color of 8.5 or less), improved oxidative stability (e.g., when 1000 ppm or less of an antioxidant is present in combination with the rosin ester, the rosin ester can exhibit an oxidative-induction time at 130° C. of at least 75 minutes), improved color stability (e.g., the rosin ester can exhibit less than a 10% change in neat Gardner color when heated to a temperature of 160° C. for a period of three hours), or combinations thereof. Also provided polymeric compositions comprising the rosin esters, as well as methods of making the rosin esters.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: April 10, 2018
    Assignee: Kranton Chemical, LLC
    Inventors: Paul A Williams, Lloyd A Nelson