Water Based Metallic Basecoat for Plastics

Add the diluted NeoRez R-974 to the premixed resin and adjust the pH to 9.5 - 10.0 with ammonia. Let down slowly other premixes in order under good stirring. Adjust final pH to 7.5. 

NeoCiyl A-639 (Zeneca) is an acrylic/styrene copolymer, 45% nvc. Butyl glycol is used as the coalescent. NeoRez R-974 (Zeneca) is a polyurethane dispersion to improve abrasion resistance. It also helps coalescence. Primal RM-5 (Rohm Haas) is a thickener. Acid resistant grades of aluminium, such as SS 3334AR WD from Silberline, should be used. 

The formulation is recoatable after 5 minutes at 50°C. Two pack urethane clearcoats and water based clearcoats are suitable as overcoats. 

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