Polytrimethylene ether diol containing coating compositions

A two component coating composition comprising Component A of a polymer having pendant groups that are reactive with isocyanate moieties and having a glass transition temperature (Tg) of 10 to 80° C.;

• and a polytrimethylene ether diol having a Mn (number average molecular weight) of 500 to 5,000;
• and
• Component B an organic polyisocyanate crosslinking agent;
• wherein Components A and B are thoroughly mixed together before application to a substrate.

A coating composition comprising a film forming binder of

• a. at least one polymer having pendant groups selected from the group consisting of hydroxyl, carboxyl, glycidyl, amine, amide, silane and mixtures thereof and having a glass transition temperature (Tg) of 10 to 80° C. and wherein the pendant groups are reactive with the crosslinking agent c.;
• b. a copolymer of polytrimethylene ether diol having a Mn (number average molecular weight) of 500 to 5,000 comprising at least 50% by weight, based on the weight of the diol of polymerized 1,3-propanediol and up to 50% by weight, based on the weight of the diol of another polymerized alkane diol;
• and
• c. a crosslinking component selected from the group consisting of organic polyisocyanates, melamine formaldehydes, alkylated melamine formaldehydes, benzoquanamine formaldehyde, urea formaldehyde, polyepoxides, silane resins and any mixtures thereof.