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Engineering plastics from lignin

11. Hydroxypropyl lignins as components of fire resistant foams

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Summary

Low density polyurethane foams (ca. 2 lbs./cu. ft.) with acceptable strength and excellent flammability resistance properties were formulated with a commercial furan polyol containing 20% hydroxypropyl lignin derivative. Propylene oxide-modified lignin from two sources, kraft and organosolv lignin, were employed. The organosolv lignin derivative exhibited better foaming characteristics than the corresponding kraft lignin, which collapsed when the rising foam was touched for testing. The weight contribution of lignin derivative was limited to 20% by compatibility with the fluorocarbon blowing agent, and solubility in polyol. Preliminary tests encourage further research on structural materials containing hydroxypropyl lignin derivatives.

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Authors and Affiliations

  1. Department of Forest Products, and Polymer Materials and Interfaces Laboratory, Virginia Polytechnic Institute and State University, 24061, Blacksburg, VA

    Wolfgang G. Glasser & Robert H. Leitheiser

  2. The Quaker Oats Company, 60010, Barrington, IL, USA

    Wolfgang G. Glasser & Robert H. Leitheiser

Authors
  1. Wolfgang G. Glasser
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  2. Robert H. Leitheiser
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Glasser, W.G., Leitheiser, R.H. Engineering plastics from lignin. Polymer Bulletin 12, 1–5 (1984). https://doi.org/10.1007/BF00258264

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  • DOI: https://doi.org/10.1007/BF00258264

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