Polycarbonate block copolymers

US8580911B2 · kind B2 · utility

Assignee

• Novomer, Inc. · US

Inventors

• Scott D. Allen · Ithaca, US
• Chris A. Simoneau · Ithaca, US
• John M. Salladay · Carmel, US
• David M. Hatfield · Midland, US
• John W. Stevens · Gillingham, GB

Key dates

• Filing date: Oct 30, 2009
• Grant date: Nov 12, 2013
• Expiry date: Jan 20, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/54
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The disclosure pertains to amphiphilic block copolymers comprising an aliphatic polycarbonate chain coupled to a hydrophilic polymer. Such amphiphilic polymers may have the formula A-L-B, where A- is a polycarbonate or polyethercarbonate chain having from about 3 to about 500 repeating units, L is a linker moiety and —B is a hydrophilic oligomer having from about 4 to about 200 repeating units. Provided copolymers are useful as surfactants capable of emulsifying aqueous solutions and supercritical carbon dioxide. Provided copolymers also have utility as additives for use in enhanced oil recovery methods.