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Polyesteramides from linseed and soybean oils for protective coatings: Diisocyanate-modified polymers

  • Technical
  • Published:
Journal of the American Oil Chemists Society

Abstract

New polymeric coating materials have been prepared by a triethylenediamine-catalyzed reaction of hydroxyl-terminated polyesteramides (HTPA) from soybean or linseed oils with diisocyanates. Eight dibasic acids or anhydrides were reacted with excess N,N-bis(2-hydroxyethyl) fatty amide to yield HTPA; those containing 10 mole per cent excess gave isocyanate-modified polymers with best overall film properties. Reactivity of four diisocyanates with a linseed-HTPA was measured by disappearance of the isocyanate band in the infrared. Depending on chemical composition, structure and curing conditions, films prepared from these polymers have a wide range of drying characteristics, hardness and chemical resistance. Drying times of linseed HTPA-urethane polymer films varied from 0.3 to 48 hr, hardness values (Sward) were from 4 to 70, alkali resistance ranged from 2 to 126 min and the hydrochloric acid and xylene resistances were good to excellent. Impact resistance exceeded 160 in.-lb for all films except two. The soybean-derived polymer films likewise exhibited a wide range of properties; they chiefly differed from linseed-derived films in having greater flexibility and improved alkali resistance.

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Authors and Affiliations

  1. Northern Regional Research Laboratory, 61604, Peoria, Illinois

    L. E. Gast, Wilma J. Schneider, G. E. McManis & J. C. Cowan

  2. No. Utiliz. Res. Dev. Div., ARS, USDA, USA

    L. E. Gast, Wilma J. Schneider, G. E. McManis & J. C. Cowan

Authors
  1. L. E. Gast
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  2. Wilma J. Schneider
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  3. G. E. McManis
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  4. J. C. Cowan
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Gast, L.E., Schneider, W.J., McManis, G.E. et al. Polyesteramides from linseed and soybean oils for protective coatings: Diisocyanate-modified polymers. J Am Oil Chem Soc 46, 360–364 (1969). https://doi.org/10.1007/BF02636865

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  • DOI: https://doi.org/10.1007/BF02636865

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