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A primer composition essentially comprising: (I) a binder system consisting of: (a) a substantially linear polyester of Mn = 3,000-15,000, of acid number 0-10 and hydroxyl index 10-25; (b) a cross-linking agent selected from a blocked polyisocyanate, melamine and an urea-formaldehyde adduct, in an equivalent ratio of 0.8-4.0 to polyester; and (c) a suitable cross-linking catalyst; (ii) one or more anti-corrosive pigments of the chromate type, being at least 90 % of all pigments, the pigment volume concentration being 90-99% of the critical pigment volume concentration or the pigment to resin weight ratio being of 0.5 to 1.2; and (iii) one or more solvents.
TW084113395A1994-12-231995-12-15A PVC-free primer coating composition
TW344757B
(en)
An improved high solids coating composition of a low molecular weight acrylic polymer and a polyisocyanate cross-linking agent, and a substrate coated therewith.