Patent ID: 9440255
Filing Date: 2016-09-13
CPC Classification: A61L,B05D,C08F,C08J,C09D

Claim Text:
1. A method for preparing a porous organic polymeric film, the method comprising: providing: (a) an aqueous phase comprising a cavity stabilizing hydrocolloid, and (b) an oil phase comprising a water-insoluble polymer or polymer precursor and an organic solvent, dispersing the aqueous phase in the oil phase to form a water-in-oil emulsion, applying the water-in-oil emulsion to a substrate to form a wet coating containing droplets of the aqueous phase in the oil phase, and removing the organic solvent from the oil phase by evaporation, removing water from the aqueous phase by evaporation, and polymerizing the polymer precursor if present, to form a porous organic polymeric film comprising a continuous polymeric solid phase, and multiple discrete cavities having inner walls and that are uniformly dispersed within the continuous polymeric solid phase,