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This paper presents a method for rapid and accurate determination of individual components in modified thermosetting acrylic-coating resins. This technique is based on infrared-absorbance measurements at 1733 cm−1, 816 cm−1, and 700 cm−1 for the acrylate, melamine-formaldehyde, and styrene components, respectively. The accuracy and precision obtained on typical system of known composition have been found to be better than ±2% absolute for any one component. Furthermore, the analysis can be performed in minutes after the initial calibration work has been completed.