Abstract: A high density polymer particle includes a cross-linked organic polymer host matrix; and a high density metal provided within the interior of the cross-linked organic polymer host matrix.

Abstract: A method of making a high density organic polymeric particle, suitable for use in milling, includes the steps of: providing an oil phase including a high density metal, a metal modifying agent, a cross-linkable organic monomer mixture, and an oil soluble polymerization initiator; admixing the oil phase under high shear conditions in an aqueous medium to produce droplets of the oil phase in the aqueous medium; and adding a hydrocolloid to the aqueous medium containing the droplets of the oil phase. The method further includes polymerizing the droplets of the oil phase to produce high density organic polymeric particles comprising a cross-linked polymer host matrix and a high density metal wherein the high density metal is within the interior of the cross-linked polymer host matrix.

Abstract: The present invention relates to a porous toner particle with encapsulated metallic flakes. The porous particle containing metallic flakes can be useful for reproduction of a metallic hue upon fusing to a substrate, preferably golden or silvery hue, and for manufacturing of printed circuits, by a printing process, especially electrophotography.

Abstract: A laser-engraveable composition comprises a laser-engraveable resin having dispersed therein non-crosslinked organic porous particles. These non-crosslinked organic porous particles have a non-crosslinked organic solid phase including an external particle surface and at least one set of discrete pores that are dispersed within the non-crosslinked organic solid phase. The laser-engraveable composition further comprises an infrared radiation absorber within at least some of the non-crosslinked organic porous particles.

Abstract: Flexographic printing precursors are prepared using laser-engraveable compositions containing a laser-engraveable resin and chemically-crosslinked organic porous particles. The presence of these porous particles, which can include an infrared radiation absorber, improves various imaging and performance properties in the preparation of flexographic printing members such as flexographic printing plates and printing sleeves.

Abstract: An article comprises one or more porous particles. Each porous particle comprises a polymer that provides a continuous solid phase including an external particle surface, and first and second discrete pores that are isolated from each other and dispersed within the continuous solid phase. The porous particle further comprises a first marker material present in the first discrete pores, and a second marker material that is detectably different from the first marker material and is present within the second discrete pores. The marker materials can provide a means for identifying documents, clothing, or other articles as genuine, and providing a detectable security system.

Abstract: Polymeric porous particles have a continuous solid phase and at least two different internal pores that are isolated from each other within the continuous phase. At least one set of discrete pores contains a marker material, and some instances, each set of discrete pores contain different pores marker materials that are isolated from each other. These marker materials are detectably different from each other. The porous particles can be spherical or non-spherical and can be used in any situation where the detectably different marker materials can be evaluated.

Abstract: Sol-gel inorganic porous particles are composed of an inorganic compound that provides an inorganic solid phase including an external particle surface. They also have a first set of pores wherein the pores have an average diameter of less than 100 nm and a second set of pores wherein the pores have an average diameter of at least 100 nm, which second set of pores contains stabilizing organic microgel particles. These inorganic porous particles are prepared using a first oil phase comprising a first water-immiscible aprotic solvent having a dielectric constant of less than 10 and having dissolved therein organic microgel particles. An aqueous phase comprising a polar solvent, an inorganic gel precursor, a catalyst, and a dispersing surfactant is neutralized to initiate condensation of the inorganic gel precursor. An oil-in-water emulsion is then formed with the organic microgel particles in the first oil phase, which is dispersed as first oil phase droplets in the aqueous phase.

Abstract: Crosslinked organic polymeric porous particles have a crosslinked organic solid phase and discrete pores dispersed within the crosslinked solid phase which pores are isolated from each other. These porous particles are prepared using one or more water-in-oil emulsions containing a polyfunctional reactive compound, a reagent that causes crosslinking, optionally an ethylenically unsaturated polymerizable monomer, and optionally an organic solvent, and can include various marker materials.

Abstract: Flexographic printing precursors are prepared using laser-engraveable compositions containing a laser-engraveable resin and chemically-crosslinked organic porous particles. The presence of these porous particles, which can include an infrared radiation absorber, improves various imaging and performance properties in the preparation of flexographic printing members such as flexographic printing plates and printing sleeves.

Abstract: Crosslinked organic porous particles are non-swellable in propyl acetate and have a crosslinked organic solid phase and discrete pores dispersed within the crosslinked organic solid phase, which discrete pores are isolated from each other. The discrete pores have an average size greater than or equal to 0.1 ?m and the crosslinked organic porous particles have a mode particle size of at least 3 ?m and up to and including 100 ?m. The discrete pores can contain a marker material.

Abstract: Crosslinked polymeric organic porous particles have a crosslinked organic solid phase and discrete pores dispersed within the crosslinked organic solid phase, which discrete pores are isolated from each other. The crosslinked organic porous particles are prepared using one or more water-in-oil emulsions containing a polyfunctional reactive compound and a reagent that causes crosslinking, and can be incorporated into or applied to various articles for many purposes. If marker materials are incorporated into the crosslinked organic porous particles, these marker materials can be detected using appropriate instruments.

Abstract: A laser-engraveable composition comprises a laser-engraveable resin having dispersed therein non-crosslinked organic porous particles. These non-crosslinked organic porous particles have a non-crosslinked organic solid phase including an external particle surface and at least one set of discrete pores that are dispersed within the non-crosslinked organic solid phase. The laser-engraveable composition further comprises an infrared radiation absorber within at least some of the non-crosslinked organic porous particles.

Abstract: The present invention is toner particle that includes a continuous phase of binder polymer and a second phase of hydrocolloid. The particle has a porosity of at least 10 percent.

Abstract: An stable oil-in-oil emulsion is disclosed containing a first oil phase dispersed as droplets in a continuous second oil phase, which droplets have a number median diameter of 10 nm to 1000 nm, wherein the first oil phase is substantially immiscible in the second oil phase and wherein the first oil phase comprises a liquid organic phosphate compound. In one preferred embodiment, the first oil phase comprises colorants, polymers, and/or other additives, depending on the particular use of the emulsion.

Abstract: In a composition comprising an oil-in-oil emulsion containing a first oil phase dispersed as liquid droplets in a continuous second oil phase, which liquid droplets have a number median diameter of about 1 ?m to 10 ?m, the liquid droplets are substantially covered with a layer of relatively smaller hydrophobically surfaced solid particles as a result of controlling the size and size distribution of the liquid droplets. The first oil phase optionally further comprises colorant and/or polymer. Also disclosed is a method for making such oil-in-oil emulsions.

Abstract: Sol-gel inorganic porous particles can be formed with two set of pores with different average sizes. These inorganic porous particles are composed of an inorganic compound that provides an inorganic solid phase including an external particle surface. They also have a first set of pores wherein the pores have an average diameter of less than 100 nm and a second set of pores wherein the pores have an average diameter of at least 100 nm. The second set of pores contains stabilizing organic microgel particles. The first and second sets of pores are isolated from each other within the inorganic solid phase.

Abstract: Sol-gel inorganic porous particles are composed of an inorganic compound that provides an inorganic solid phase including an external particle surface. They also have a first set of pores wherein the pores have an average diameter of less than 100 nm and a second set of pores wherein the pores have an average diameter of at least 100 nm, which second set of pores contains stabilizing organic microgel particles. These inorganic porous particles are prepared using a first oil phase comprising a first water-immiscible aprotic solvent having a dielectric constant of less than 10 and having dissolved therein organic microgel particles. An aqueous phase comprising a polar solvent, an inorganic gel precursor, a catalyst, and a dispersing surfactant is neutralized to initiate condensation of the inorganic gel precursor. An oil-in-water emulsion is then formed with the organic microgel particles in the first oil phase, which is dispersed as first oil phase droplets in the aqueous phase.

Abstract: The present invention is an ink comprising a solid phase and a liquid phase wherein the solid phase comprises a polymeric binder and the liquid phase comprises oil and a pigment, the solid phase and the liquid phase forming a discrete particle having multiple domains of the liquid phase.

Abstract: The present invention is a method of manufacturing ink. The method includes providing a first organic phase of a solvent containing a dissolved polymer, an oil and a pigment. The organic solvent is dispersed in an aqueous phase containing a stabilizer to form an emulsion containing droplets of the organic phase. The solvent is removed from the droplets to form discrete particles having multiple domains of oil and pigment.