Water reducible polyester and resin composition for a flexible plastic primer
AssigneeBee Chemical Company
InventorsMichael L. Jackson, Frank A. Stubbs, Joseph M. Mecozzi, Dean T. Smith
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Abstract
A water-free, water-free reducible primer composition having a volatile organic content of less than 3 pounds per gallon yields a tough, flexible, and weatherable film when applied to metal or plastic substrates. The base resin is a polyester having an acid number of from about 50 to about 60 and a hydroxyl number of from about 160 to about 200. The polyester is the reaction product of from about 0.45 to about 0.5 mole % of adipic acid, from about 0.35 to about 0.4 mole % of neopentyl glycol, and from about 0.15 to about 0.2 mole % of trimethylolpropane.
Claims12
A water-reducible polyester having an acid number of from about 50 to about 60 and a hydroxyl number of from about 160 to about 200 which consists essentially of the reaction product of from about 0.45 to about 0.5 mole % of adipic acid, from about 0.35 to about 0.4 mole % of neopentyl glycol, and from about 0.15 to about 0.2 mole % of trimethylolpropane.
A water-free, water-reducible, flexible, exterior primer composition consisting essentially of a water-reducible polyester having an acid number of from about 50 to about 60 and a hydroxyl number of from about 160 to about 200 which is the reaction product of from about 0.45 to about 0.5 mole % of adipic acid, from about 0.35 to about 0.4 mole % of neopentyl glycol, and from about 0.15 to about 0.2 mole % of trimethylolpropane;
- an aminoplast curing agent, and a water-soluble organic solvent.
A method for applying a primer to a substrate comprising simultaneously introducing water and a water-free, water-reducible, flexible, exterior primer composition consisting essentially of a water-reducible polyester having an acid number of from about 50 to about 60 and a hydroxyl number of from about 160 to about 200 which is the reaction product of from about 0.45 to about 0.5 mole % of adipic acid, from about 0.35 to about 0.4 mole % of neopentyl glycol, and from about 0.15 to about 0.2 mole % of trimethylolpropane;
- an aminoplast curing agent, and a water-soluble organic solvent into a spray gun head and spraying the water-reduced primer onto the substrate.
Dependencies are inferred from the claim text.