Crosslink mechanisms of high-solids alkyd resins in the presence of reactive diluents

  • Muizebelt W
  • Hubert J
  • Nielen M
 et al. 
  • 35


    Mendeley users who have this article in their library.
  • 72


    Citations of this article.


The drying of alkyds was studied using NMR and mass spectrometry employing model compounds. Crosslinking occurs via oxidation of unsaturated fatty (linoleic) acids in the resin. Hydroperoxides formed as intermediates are degraded to alkoxy and peroxy radicals by cobalt catalyst. These radicals then recombine to form mainly ether and peroxy crosslinks. However, with conjugated fatty acids another mechanism prevails in which addition of radicals to the double bonds occurs. Despite the differences in mechanism the rates of both reactions were found to be similar. High-solids alkyd coatings may employ reactive diluents replacing traditional solvents (white spirit). The rate of incorporation of these reactive diluents into the actual paint film during drying can be followed with NMR. Allyl ether groups appear to react fastest whereas allyl esters show generally little reactivity. Using mass spectrometry it was found that incorporation involves recombination of radicals as well. However, reactive diluents with conjugated double bonds will be incorporated by radical addition.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • W. J. Muizebelt

  • J. C. Hubert

  • M. W.F. Nielen

  • R. P. Klaasen

  • K. H. Zabel

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free