| abstract |
The present invention relates to have tertiary amine or quaternary amine anchor group and be selected from C 8-50 fatty acid; C 8-50 alk(en) group substituted succinic acid, acid anhydride or partial ester; Dimer or trimer fatty acid Dispersants for solubilizing polymers and/or polymers from repeat units of polyesters, polyethers, polyacrylates, polyamides, polyurethanes or mixtures of said repeat units in the form of random or block copolymers. The improvement of the dispersant is that, relative to the prior art, the alkylene linking group between the tertiary or quaternized amine and the solubilising polymer lacks on the twin carbon atom of the nitrogen of the tertiary or quaternized amine Extractable hydrogen atoms. The dispersants are useful as dispersants with improved thermal stability and low levels of yellow color after aging at elevated temperatures. |