Rapid Melamine-Formaldehyde Resin Characterization by Means of Quantitative¹³C NMR with Polarization Transfer

Abstract

Etherified melamine resins are well known from the lacquer and paint industry. Up to now, important characterization in terms of composition and structure has been a timeconsuming procedure. Now, fast analysis can also be achieved by use of 13 C nuclear magnetic resonance spectroscopy. A special polarization transfer technique was applied to overcome the inherent low signal/noise ratio of 13 C NMR spectra. The melamine content of the resin was determined by combustion analysis. This combination of methods allows for fast resin analysis with accuracy as yet unmatched and shows good correlation with established techniques.

IR spectroscopy: Suitable method for determination of curing degree and crosslinking type in melamine–formaldehyde resins

“…In particular, 13 C NMR experiments are extensively used and additional information can be provided from 1 H and 15 N experiments . The addition reaction of formaldehyde and melamine as well as the various species present in liquid resin samples were investigated by means of liquid 1 H and 13 C NMR spectroscopy . Ebdon et al .…”