Foams made by photopolymerization of emulsions

An open cell cross-linked foam made from an emulsion comprising a reactive phase and an immiscible phase and containing residue of an emulsifier and no residue of a thermal initiator wherein the open cell structure is made of a majority of cells in open communication with each other and having intercellular openings, or interconnected channels creating at least one open pathway through the foam wherein open areas in the foam correspond to the immiscible phase of the emulsion prior to polymerization and crosslinking of the reactive phase.

An open cell cross-linked foam made from an emulsion comprising a reactive phase and an immiscible phase and having a dimensionally long-range macroscopic structure and a density greater than 0.01 g/cm3 and comprising residue of a photoinitiator that absorbs at wavelengths of 300 to 800 nanometers wherein the open cell structure is made of a majority of cells in open communication with each other and having intercellular openings, or interconnected channels creating at least one open pathway through the foam wherein open areas in the foam correspond to the immiscible phase of the emulsion prior to polymerization and crosslinking of the reactive phase.

An article made from an open cell cross-linked foam made from an emulsion comprising a reactive phase and an immiscible phase and having a dimensionally long-range macroscopic structure and comprising residue of a photoinitiator that absorbs at wavelengths of 300 to 800 nanometers wherein the open cell structure is made of a majority of cells in open communication with each other and having intercellular openings, or interconnected channels creating at least one open pathway through the foam wherein open areas in the foam correspond to the immiscible phase of the emulsion prior to polymerization and crosslinking of the reactive phase and wherein the foam is crosslinked within the voids of a material selected from the group consisting of polymeric, woven, nonwoven, and metals and wherein the article is used as a wound dressing.

An open cell cross-linked foam made from an emulsion comprising a reactive phase and an immiscible phase and having a dimensionally long-range macroscopic structure and comprising residue of a photoinitiator that absorbs at wavelengths of 300 to 800 nanometers, wherein the open cell structure is made of a majority of cells in open communication with each other and having intercellular openings, or interconnected channels creating at least one open pathway through the foam wherein open areas in the foam correspond to the immiscible phase of the emulsion prior to polymerization and crosslinking of the reactive phase and wherein the foam absorbs fluid and wherein the foam density decreases by at least 10% as it absorbs fluid.

An article comprising an open cell cross-linked foam made from an emulsion comprising a reactive phase and an immiscible phase and having a dimensionally long-range macroscopic structure and comprising residue of a photoinitiator that absorbs at wavelengths of 300 to 800 nanometers wherein the open cell structure is made of a majority of cells in open communication with each other and having intercellular openings, or interconnected channels creating at least one open pathway through the foam wherein open areas in the foam correspond to the immiscible phase of the emulsion prior to polymerization and crosslinking of the reactive phase and wherein the article is used for wound dressings.

An article comprising an open cell cross-linked foam having a dimensionally long-range macroscopic structure comprising residue of a photoinitiator that absorbs at wavelengths of 300 to 800 nanometers wherein the article comprises a multilayer structure and wherein two or more layers differ by more than 20% with respect to a property selected from the group consisting of density, and content of a particular component.

An article comprising an open cell cross-linked foam having a dimensionally long-range macroscopic structure comprising residue of a photoinitiator that absorbs at wavelengths of 300 to 800 nanometers wherein the article has two or more regions differing by more than 20% with respect to a property selected from the group consisting of density and content of a particular component.