Abstract: Disclosed are compositions comprising a copolyester of(A) at least one aromatic or saturated aliphatic or cycloaliphatic dibasic acid having 4 to 36 carbon atoms,(B) from about 2 to about 40%, based on the weight of the copolyester, of a carboxylated polyolefin selected from the group consisting of (1) oxidized polyolefins and (2) the reaction product of(a) at least one homo or copolymer of an .alpha.- olefin having from 2 to 10 carbon atoms and(b) at least one unsaturated acid or anhydride having from 3 to 5 carbon atoms or a 1 to 10 carbon atom alkyl ester thereof, and(C) at least one saturated aliphatic or cycloaliphatic glycol having from 2 to 12 carbon atoms,the copolyester having a crystalline melting point of about 70.degree.-200.degree. C. and an I.V. of about 0.2-1.6. These compositions are especially useful as coatings and adhesives.