Patent Number: 7,713,541

Title: Zwitterionic terpolymers, method of making and use on medical devices

Abstract: Biocompatible terpolymers are manufactured to include a zwitterionic monomer, an alkoxy acrylate monomer, and a hydrophobic monomer. The alkoxy acrylate monomer can be a 2-methoxyethyl methacrylate (MOEMA) or a 2-methoxyethyl methacrylate (EOEMA). Alternatively, the alkoxy acrylate can be 2-methoxyethyl acrylate (MOEA) or 2-methoxyethyl acrylate (EOEA). The alkoxy acrylate monomers advantageously give the zwitterionic copolymers greater ductility, strength, and toughness while maintaining a desired amount of hydrophilicity. The improved toughness allows the zwitterionic copolymers to be processed without cross-linking, which improves the elongation properties of the zwitterionic copolymer, and reduces the risk of cracking during use.

Inventors: Pacetti; Stephen (San Jose, CA), Roorda; Wouter Erik (Palo Alto, CA)

Assignee: Abbott Cardiovascular Systems Inc.

International Classification: A61F 2/02 (20060101)

Expiration Date: 5/11/12018