Extension of Activating Period of 2K Polyurethane Coatings via Automatic Spraying Process
With the application of industrial automatic spraying system technology,it is necessary for 2K polyurethane coatings to consider the balance between the activating period and curing time.In this article,the effects of ketone and acid inhibitors on the reactivity of the organotin catalysts are investigated.It is revealed that the activating period of the 2K polyurethane coatings is effectively prolonged.Specifically the viscosity of coatings after curing reaction for 3 hours can be stablized at its initial state and the coating properties are not affected negatively.It can provide a guide for automatic spraying process,meanwhile can provide a safe and efficient working environment for practical production.
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