Patent ID: 8450447

Claim:
A copolyesteramide polymer of formula (I): wherein R at each occurrence is independently an aliphatic group, a heteroaliphatic group, cycloalkylene, -alkylene-cycloalkyl-, -alkylene-cycloalkyl-alkylene-, -heteroalkylene-cycloalkyl-, -cycloalkyl-heteroalkylene-, -heteroalkylene-cycloalkyl-heteroalkylene-, or a polyalkylene oxide; R′ and R″ at each occurrence are independently a bond or an aliphatic group, cycloalkylene, -alkylene-cycloalkyl-, or -alkylene-cycloalkyl-alkylene-; R N is —N(R 2 )—Ra—N(R 2 )— where R 2 is independently H or C 1 -C 6 alkyl, Ra independently is a heterocycloalkylene group, an aliphatic group, cycloalkylene, -alkylene-cycloalkyl-, -cycloalkyl-alkylene-, or -alkylene-cycloalkyl-alkylene, wherein the heterocycloalkylene group contains two nitrogen atoms connecting the heterocycloalkylene to the adjacent carbonyl groups; x is 1 or higher that represents the number of ester units and y is an integer of 2 or higher that represents the number of amide units in the copolymer; each n independently represents an integer of 1 or greater; and wherein the copolymer of formula (I) comprises two or more said amide units: where n is 1 in at least half the number of said amide units; and n is greater than 1 in at least one of said amide units, with the copolymer having an H w of greater than 1.05 and less than 1.9, wherein H w is a weighted average value of n.