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Synthesis of α-hydroxy-ω-amino poly(ethylene oxide) and its use in reaction injection moulding (RIM)

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Summary

Computer simulations show that oligomers with two different terminal groups with dissimilar reactivities for isocyanates give a delayed viscosity rise in polyurethanes. This is a desired behaviour for RIM processes. Therefore, an α-hydroxy-ω-amino poly(ethylene oxide) (HAPEO) has been prepared. The synthesis was carried out by the ethoxylation of 2-hydroxyethyl phthalimide as a blocked amine. Hydrazinolysis appears to be the best way to obtain the deblocked oligomer. The product properties were compared with an oligomeric diamine ether (Jeffamine D2000). The gel time of HAPEO (Mn=500) and JAD2000 (Mn=2000) was the same (2 sec.). The product with HAPEO had a higher modulus, a comparable impact and tensile strength and a lower elongation at break.

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Authors and Affiliations

  1. DSM Research, P.O. Box 18, 6160 MD, Geleen, The Netherlands

    Ton J. A. Loontiens, Boudewijn J. R. Scholtens & Wil J. W. Belt

  2. Polymer Technologies, Inc., University of Detroit Mercy, 4001 W. McNichols Road, 48219-0900, Detroit, MI, USA

    Kurt C. Frisch & Shaio-wen Wong

Authors
  1. Ton J. A. Loontiens
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  2. Boudewijn J. R. Scholtens
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  3. Wil J. W. Belt
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  4. Kurt C. Frisch
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  5. Shaio-wen Wong
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Loontiens, T.J.A., Scholtens, B.J.R., Belt, W.J.W. et al. Synthesis of α-hydroxy-ω-amino poly(ethylene oxide) and its use in reaction injection moulding (RIM). Polymer Bulletin 30, 489–494 (1993). https://doi.org/10.1007/BF00296465

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  • DOI: https://doi.org/10.1007/BF00296465

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