Patent ID: 8629231

Claim:
A method of making an oligomer, comprising: (a) reacting one mole of a uretdione compound (I) wherein each R 1 is independently selected from alkylene groups having 1 to 12 carbon atoms, arylene groups having 5 to 12 carbon atoms, and arylalkylene and alkylarylene groups having 6 to 15 carbon atoms, wherein alkylene groups, alkylene portions of arylakylene groups, and alkyl portions of alkylarylene groups are linear, branched, or cyclic; with two moles of compound (II) selected from compounds having one group having an active hydrogen reactive with isocyanate and further having a primary carbamate group or a cyclic carbonate group to form a compound (III), and (b) reacting compound (III) with a reactant having at least two active hydrogen-containing groups selected from the group consisting of polyols, polyamines having at least two amine groups selected from primary and secondary amine groups, and aminoalcohols having at least one amine group that is a primary or secondary amine group under reaction conditions that cause the uretdione ring to cleave and react with the active hydrogens to form the oligomer.