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Zur Analytik von Harnstoff-Melamin-Formaldehyd-Harzen

  • Dietrich Braun
  • Hans-Josef Ritzert
Originalarbeiten Organisch-Technische Analyse
  • 33 Downloads

Analysis of urea-melamine-formaldehyde resins

Summary

A method is described for the distinction between urea-formaldehyde and melamine-formaldehyde resins by precipitating the melamine derivates with picric acid. The analysis of this precipitation by urease-decomposition gives information whether urea and melamine are condensed with formaldehyde together or whether the investigated resin is only a mixture of an urea-formaldehyde and a melamine-formaldehyde resin.

Moreover, it is possible to prove the formation of cocondensates of urea, melamine, and formaldehyde during the three-component condensation by combination of these two methods.

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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • Dietrich Braun
    • 1
  • Hans-Josef Ritzert
    • 1
  1. 1.Deutsches Kunststoff-InstitutDarmstadtBundesrepublik Deutschland

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