Osmotically-driven fluid dispenser and coating composition

Details Osmotically-driven fluid dispenser and coating composition Osmotically-driven fluid dispenser and coating composition

C - Chemistry, Metallurgy

09

D

C09D 133/12 (2006.01) C09D 7/12 (2006.01) C09D 101/14 (2006.01) C09D 101/28 (2006.01)

Patent

CA 2683185

A coating composition useful for forming a semipermeable membrane is provided as well as a method of forming such a membrane. The coating composition comprises a mixture of: (i) polymer that is cellulose acetate butyrate, cellulose acetate propionate, polymethylmethacrylate, a mixture of any of the foregoing, or a mixture of any of the foregoing with ethyl cellulose; and, (ii) solvent that is acetone, a mixture of acetone and water, a mixture of acetone and one or more lower alkanols having 1-8 carbon atoms, or a mixture of the foregoing. The composition may optionally comprise one or more plasticizers and/or flux enhancers.

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