Patent ID: 6555226
Filing Date: 2003-04-29
Classification: C08G,C08L,C09D,Y10T

Abstract:
A carboxyl group-containing polyester resin for use in a powder coating and comprising(a) from about 45 to 55 mole percent of an aromatic diacid component of which at least 90 mole percent is isophthalic acid, (b) from about 40 to about 50 mole percent of a diol component, (c) from about 0 to about 7 mole percent of an aliphatic diacid containing from 4 to 13 carbon atoms, and (d) from about 0 to about 3 mole percent of a branching agent having at least 3 alcohol or acid groups or both, such that the polyester resin has a glass transition temperature of 44Â° to 55Â° C., an adid number of 35-55 milligrams of potassium hydroxide per gram of resin, a hydroxyl number less than 10 milligrams of potassium per gram of resin, and a viscosity of less than 1500 centipoise as measured at 220Â° C. by an ICI cone and plate viscometer.