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Epoxidation of polyesters of tetrahydrophthalic acid and unsaturated alkyd resins

  • Published:
Journal of the American Oil Chemists Society

Summary

New polyepoxides are reported which are epoxidation products of unsaturated polyesters. These polyepoxides are unique in that they may be formulated to have a large number of epoxide groups per molecule; 10 or more may be practically obtained.

Anin situ process for the formation of peracetic acid, using dehydrated cation exchange resin of the styrene-divinyl benzene sulfonic acid type, has been described for the efficient epoxisation of the unsaturated polyesters reported.

A dehydrated strong base anion exchange resin will remove free acid, the major impurity resulting from the peracid epoxidation reaction, without contaminating the polyepoxide polyester with appreciable water and without appreciable loss in epoxide content during the purification. Alternatively co-distillation of the free acid with aromatic solventin vacuo may be used as a method of purification but with some loss in epoxide content. These techniques are desirable in preparations of compositions of the type described wherein the usual washing techniques cannot be employed.

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References

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Authors and Affiliations

  1. Applied research Department, Research and Development Division, S. C. Johnson and Son Inc., Racine, Wisconsin

    John W. Pearce & John Kawa

Authors
  1. John W. Pearce
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  2. John Kawa
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Pearce, J.W., Kawa, J. Epoxidation of polyesters of tetrahydrophthalic acid and unsaturated alkyd resins. J Am Oil Chem Soc 34, 57–61 (1957). https://doi.org/10.1007/BF02638017

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  • DOI: https://doi.org/10.1007/BF02638017

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