A process to make a polyester is described wherein said polyester comprises, a) substituted or unsubstituted diacid or diester; b) substituted or unsubstituted diol; wherein said diol comprises at least about 0.5 mole percent of butanediol; and c) 0.01 weight percent to about 15 weight percent based on the total weight of the composition a reactive organic compound wherein said organic compound comprises of at least one functional group.