A coating composition comprising a film forming binder of
a. an acrylic polymer having pendant groups that are reactive with
isocyanate moieties and having a glass transition temperature (Tg) of 10
to 80.degree.C.;
b. a polytrimethylene ether diol having a Mn (number average molecular
weight) of 500 to 5,000; and
c. an organic polyisocyanate crosslinking agent;
wherein the coating composition contains pigments and cures at ambient
temperatures or elevated temperatures and forms a coating that is sandable
and when used in combination with a top coat, for example, a colored base
coat and clear coat or a pigmented mono-coat forms a chip resistant
multi-layer coating useful for refinishing or repairing automotive and
truck bodies and parts.
