Fig. 5

FTIR spectra of 1KWBPU systems; Imron 1.2 HG-C clearcoat, Imron 1.5 Pr grey primer and Imron 1.5 ST-D direct-to-metal white topcoat. The three spectra all display a single band in the 1730–1650 cm−1 region

FTIR spectra of 1KWBPU systems; Imron 1.2 HG-C clearcoat, Imron 1.5 Pr grey primer and Imron 1.5 ST-D direct-to-metal white topcoat. The three spectra all display a single band in the 1730–1650 cm−1 region