APPLICATION AND FILM PROPERTIES

The crosslinking reaction illustrated earlier in this section takes place at temperatures from just above 0°C upwards, producing levels of performance similar or, in some cases, superior to high quality stoving systems. 

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Using optimized resins, good quality air dry and baking alkyd coatings can be formulated with VOC levels of280-350 g/L of coating. A 250-g/L level is attainable only with some sacrifice of application and film properties still lower limits of permissible VOC are projected. 

Enhanced cure rates and cure depths,as well as desirable application and film properties, have been reported for photocrosslinking mixtures of acrylate- and epoxy-functional resins using mixtures of photoinitiators for radical and cationic polymerization. 

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