Patent ID: 7625994

Claim:
A sulfonated aliphatic-aromatic copolyetherester consisting essentially of: 80.0 to 20.0 mole percent of an aromatic dicarboxylic acid residue based on the total moles of dicarboxylic acid residue; 20.0 to 80.0 mole percent of an aliphatic dicarboxylic acid residue based on the total moles of dicarboxylic acid residue; 0.1 to 10.0 mole percent of a sulfonate component residue; 99.9 to 91.0 mole percent of a first glycol residue selected from the group consisting of ethylene glycol residue, 1,3-propanediol residue, and 1,4-butanediol residue based on the total moles of glycol residue; 0.1 to 4.0 mole percent of a poly(alkylene ether) glycol residue based on the total moles of glycol residue; 0 to 5.0 mole percent of a second glycol residue based on the total moles of glycol residue; and 0 to 5.0 mole percent of a polyfunctional branching agent residue; said sulfonated aliphatic-aromatic copolyetherester having a crystalline melting temperature of at least 203.5° C. and not more than 217.5° C.