Porous organic polymeric films and preparation
AssigneeEastman Kodak Company
InventorsMridula Nair, Tamara K. Jones
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Abstract
Porous organic polymeric films having multiple discrete cavities can be prepared using a water-in-oil emulsion that includes a cavity stabilizing hydrocolloid on the inner walls of the multiple discrete cavities. The multiple discrete cavities can also include organic catalytic materials for various catalytic reactions, markers materials for security applications, or the multiple discrete cavities can be used to increase opacity, hydrophobicity, or other desirable properties compared to nonporous organic polymeric films composed of the composition and dry thickness.
Claims17
A porous organic polymeric film comprising a water-insoluble polymer that provides a continuous polymeric solid phase, and multiple discrete cavities having inner walls and that are uniformly dispersed within the continuous polymeric solid phase, wherein the porous organic polymeric film further comprises a cavity stabilizing hydrocolloid on the inner walls of the multiple discrete cavities,
- wherein the porous organic polymeric film further comprises an emulsifier having a hydrophilic-lipophilic balance value equal to or less than 6, which emulsifier is disposed at the interface of the multiple discrete cavities and the continuous polymeric solid phase of the porous organic polymeric film, and
- wherein the emulsifier is an amphiphilic block copolymer that comprises a hydrophilic segment comprising polyethyleneoxide and an oleophilic segment derived from a polyester, a polycarbonate, or a polyamide.
Dependencies are inferred from the claim text.