The invention relates to microcapsule composition which encapsulates active material that may be used in products for washing and cleaning and/or care and protection of animate or inanimate. The invention also relates to polyurethane and polyurea microcapsules that may be modified with additional polymers.

A method of fabricating shaped particles is disclosed. The method involves generating a plurality of droplets within dispersion media (e.g., oil and surfactant), the plurality of droplets formed from a mixture of precursor materials that are in a miscible state. A stimulus or change of conditions is then introduced to the droplets so as to cause the mixture of precursor materials to become immiscible and phase-separate from one another. The phase-separated droplets are then crosslinked to form shaped particles. The stimulus or change of conditions may include one or more of the following: a change in temperature, a change in pH, a change in osmolarity, a change composition of the droplets, a change in the composition of the dispersion media. The shaped particles may be washed to remove un-crosslinked material and one or more affinity capture agents may be immobilized onto the shaped particles.

A method of fabricating shaped particles is disclosed. The method involves generating a plurality of droplets within dispersion media (e.g., oil and surfactant), the plurality of droplets formed from a mixture of precursor materials that are in a miscible state. A stimulus or change of conditions is then introduced to the droplets so as to cause the mixture of precursor materials to become immiscible and phase-separate from one another. The phase-separated droplets are then crosslinked to form shaped particles. The stimulus or change of conditions may include one or more of the following: a change in temperature, a change in pH, a change in osmolarity, a change composition of the droplets, a change in the composition of the dispersion media. The shaped particles may be washed to remove un-crosslinked material and one or more affinity capture agents may be immobilized onto the shaped particles.

Heat-expandable microspheres including a thermoplastic resin shell and a thermally-vaporizable blowing agent encapsulated therein. The thermoplastic resin is produced by polymerizing a polymerizable component containing (A) a nitrile monomer including acrylonitrile and methacrylonitrile, (B) a carboxyl-group-containing monomer, and (C) a monomer copolymerizable with the nitrile monomer (A) and the carboxyl-group-containing monomer (B). Further, the amount of the acrylonitrile in the nitrile monomer (A) ranges from 0.1 to 9 wt % based on the nitrile monomer (A). Also disclosed are hollow particles manufactured by heating and expanding the heat-expandable microspheres; a composition containing a base compound and at least one particulate material selected from the heat-expandable microspheres and the hollow particles; and a formed product manufactured by molding or applying a coat of the composition.

Heat-expandable microspheres including a thermoplastic resin shell and a thermally-vaporizable blowing agent encapsulated therein. The thermoplastic resin is produced by polymerizing a polymerizable component containing (A) a nitrile monomer including acrylonitrile and methacrylonitrile, (B) a carboxyl-group-containing monomer, and (C) a monomer copolymerizable with the nitrile monomer (A) and the carboxyl-group-containing monomer (B). Further, the amount of the acrylonitrile in the nitrile monomer (A) ranges from 0.1 to 9 wt % based on the nitrile monomer (A). Also disclosed are hollow particles manufactured by heating and expanding the heat-expandable microspheres; a composition containing a base compound and at least one particulate material selected from the heat-expandable microspheres and the hollow particles; and a formed product manufactured by molding or applying a coat of the composition.

Compositions and methods are provided for making hyper compliant polymer particles by inverse emulsification and having a predetermined mechanical compliance and a predetermined size with a monodisperse diameter. Compositions and methods are provided for use of hyper compliant polymer particles in drug delivery, assay, particle image velocimetry, ceramics, cosmetics, deconvolution, electronic paper, insulation, personal care, standards, retroreflective paint and paint applications, thickening agents, regenerative medicine, device calibration, micro-carriers and force indicators.

Compositions and methods are provided for making hyper compliant polymer particles by inverse emulsification and having a predetermined mechanical compliance and a predetermined size with a monodisperse diameter. Compositions and methods are provided for use of hyper compliant polymer particles in drug delivery, assay, particle image velocimetry, ceramics, cosmetics, deconvolution, electronic paper, insulation, personal care, standards, retroreflective paint and paint applications, thickening agents, regenerative medicine, device calibration, micro-carriers and force indicators.

The present invention relates to a process for obtaining an encapsulated composition, to encapsulated compositions obtainable by this process, to products comprising these encapsulated compositions and to the use of these encapsulated compositions to provide consumer products.

The present invention relates to a process for obtaining an encapsulated composition, to encapsulated compositions obtainable by this process, to products comprising these encapsulated compositions and to the use of these encapsulated compositions to provide consumer products.

The microcapsules and process of making describe a novel core shell microcapsule. The microcapsule incorporates a polysaccharide such as chitosan into the microcapsule wall forming the shell. The microcapsule shell is formed by dissolving chitosan into a material of structure ##STR00001##
wherein each R is independently selected from hydrogen, C.sub.1 to C.sub.8 alkyl, or a cyano group; and each y is independently an integer from 1 to 8, and reacting with a multifunctional (meth)acrylate.