A light-irradiating device of the disclosure comprises: a light-irradiating unit comprising a housing in which a light-emitting element is disposed, the housing comprising a light irradiation surface through which light from the light-emitting element can be transmitted; and a gas supply unit comprising a flow channel connected to a part of the light irradiation surface of the housing. A printing device of the disclosure comprises: the light-irradiating device mentioned above; a conveying unit which conveys a medium to be printed while causing the medium to face the light irradiation surface of the light-irradiating device; and a printing unit which is disposed adjacent to and upstream from the light-irradiating device in a conveyance direction of the medium to be printed.

Described herein are inks and coating compositions comprising semiconductor metal oxides and composites thereof, which are natural environmentally sustainable materials that may be recycled and/or reused indefinitely. Semiconductor metal oxides offer an alternative to relatively more toxic, non-sustainable, photo and heat-degrading, migrating traditional photoinitiator agents used in actinic radiation curable compositions. The semiconductor metal oxides and composites thereof absorb visible or UV-light as photocatalysts and/or semiconductors, or absorb electron beam radiation, forming radicals for radical events as polymerization reactions and color enhancement events.

Described herein are inks and coating compositions comprising semiconductor metal oxides and composites thereof, which are natural environmentally sustainable materials that may be recycled and/or reused indefinitely. Semiconductor metal oxides offer an alternative to relatively more toxic, non-sustainable, photo and heat-degrading, migrating traditional photoinitiator agents used in actinic radiation curable compositions. The semiconductor metal oxides and composites thereof absorb visible or UV-light as photocatalysts and/or semiconductors, or absorb electron beam radiation, forming radicals for radical events as polymerization reactions and color enhancement events.

Provided is photo-sintering nano ink. The photo-sintering nano ink includes a photo-sintering precursor including a conductive nano particle and an oxide film surrounding the conductive nano particle, polymer binder resin, and an adhesive.

Provided is photo-sintering nano ink. The photo-sintering nano ink includes a photo-sintering precursor including a conductive nano particle and an oxide film surrounding the conductive nano particle, polymer binder resin, and an adhesive.

A latex and solution with UV-active monomers created using styrenic polymers created via the depolymerization of a polystyrene feedstock. In some embodiments the polystyrene feedstock contains recycle polystyrene. In some embodiments, the styrenic polymers contain olefins. In some embodiments, the latex and solution with UV-active monomers are used in ink formulations. In some embodiments, latex and solution UV-active monomers can replace styrenated acrylics within flexo and/or gravure ink formulations. Other applications of the latex and solution with UV-active monomers can include, but are not limited to, coatings, paints, adhesives. Additional applications of the latex can include but are not limited to immunoassays.

The present disclosure is drawn to a reactive polyurethane dispersion including a polymer strand having a polymer backbone that has two ends terminating at a first capping unit and a second capping unit. The polymer backbone can include polymerized monomers including a reactive diol and a diisocyanate. The reactive diol can be an acrylate-containing diol, a methacrylate-containing diol, a styrene-containing diol, or combination thereof. The first capping unit can be a styrene-containing monoalcohol reacted with an isocyanate group of the diisocyanate. The second capping unit can be an ionic stabilizing group.

The present disclosure is drawn to a reactive polyurethane dispersion including a polymer strand having a polymer backbone that has two ends terminating at a first capping unit and a second capping unit. The polymer backbone can include polymerized monomers including a reactive diol and a diisocyanate. The reactive diol can be an acrylate-containing diol, a methacrylate-containing diol, a styrene-containing diol, or combination thereof. The first capping unit can be a styrene-containing monoalcohol reacted with an isocyanate group of the diisocyanate. The second capping unit can be an ionic stabilizing group.

The present disclosure is drawn to reactive polyurethane dispersions. In one example, a reactive polyurethane dispersion can include a polymer strand having a polymer backbone that has two ends terminating at a first capping unit and a second capping unit. The polymer backbone can include polymerized monomers including a reactive diol and a diisocyanate. The reactive diol can be an acrylate-containing diol, a methacrylate-containing diol, an acrylamide-containing diol, a methacrylamide-containing diol, or combination thereof. The first capping unit can be an acrylamide-containing monoalcohol or methacrylamide-containing monoalcohol reacted with an isocyanate group of the diisocyanate. The second capping unit can be an ionic stabilizing group.

The present disclosure is drawn to reactive polyurethane dispersions. In one example, a reactive polyurethane dispersion can include a polymer strand having a polymer backbone that has two ends terminating at a first capping unit and a second capping unit. The polymer backbone can include polymerized monomers including a reactive diol and a diisocyanate. The reactive diol can be an acrylate-containing diol, a methacrylate-containing diol, an acrylamide-containing diol, a methacrylamide-containing diol, or combination thereof. The first capping unit can be an acrylamide-containing monoalcohol or methacrylamide-containing monoalcohol reacted with an isocyanate group of the diisocyanate. The second capping unit can be an ionic stabilizing group.