Spectroscopic determination of coating and paint mixture compositions

摘要

The composition of a mixture containing at least two reactive components is determined by means of spectroscopy. The measured reflection spectrum of the mixture is compared with at least one standard spectrum of a mixture with a predetermined mixing proportion. Also claimed is an apparatus for the above process, comprising a spectrophotometer and attached probe and calculating unit. The unit has a memory for storing at least one standard spectrum, corresponding to a selected mixture proportion, and a means to compare this spectrum with the unknown. The composition of a mixture containing at least two reactive components is preferably determined by means of reflection spectroscopy. The mixture can preferably consist of an epoxy-type resin and an amine-type hardener or an hydroxyl-type resin and an isocyanate-type hardener.