Abstract: A biodegradable delivery particle having a benefit agent containing core and a shell.

Abstract: A population of core/shell delivery particles, where the shell is made, at least in part, of a polymeric material that is the reaction product of chitosan and a cross-linking agent, where the chitosan is characterized by a particular weight average molecular weight, such as from 100 kDa to 600 kDa. Related methods of making and using such compositions.

Abstract: Core shell microcapsules are provided wherein the capsule shell is an interfacial copolymer formed of a gelatin and an isocyanate.

Abstract: A composition comprising a population of core/shell delivery particles, where the shell includes a polymeric material formed from a cross-linked amine-containing biopolymer, and where the core includes a fragrance material that includes ester-containing perfume raw materials. Related methods of making and using such compositions.

Abstract: A population of core-shell delivery particles comprising a benefit agent core material and a shell encapsulating the core material is described, along with a process for forming such delivery particles and articles of manufacture. The shell is the reaction product of a crosslinking agent and a modified chitosan. Chitosan is treated with a mixture of an acid and redox initiator comprising a persulfate or peroxide, which results in an enhanced polymeric shell. The delivery particle of the invention has improved release characteristics, with enhanced degradation characteristics in OECD test method 301B.

Abstract: A composition comprising a population of core/shell delivery particles, where the shells of the particles are made, in part, from biopolymers, and where the particles are characterized as having certain ductile properties. Related methods of making and using such compositions.

Abstract: An improved polyurea and chitosan core-shell delivery particles encapsulating a benefit agent is described. Chitosan is pre-modified with a modifying compound which is cationic, anionic, or nonionic. Alternatively the modification is accomplished in situ. The modifying compound is selected from the group consisting of an epoxide, aldehyde, or an ?,?-unsaturated compound, and is reactive with free amine moieties of chitosan, covalently bonding through CN bonds with the amine moieties of the chitosan. The modifying compound can contain acidic, hydroxyl, and quaternary ammonium groups. The reaction product of the chitosan, the modifying compound along with an electrophile, preferably a polyisocyanate yields a microcapsule with charge, improved release characteristics, improved compatibility or enhanced degradation characteristics, such as in OECD test method 301B.

Abstract: Core shell microcapsules are provided wherein the capsule shell is the reaction product of a polysaccharide, an amine or an aminating agent, and an isocyanate.

Abstract: An improved delivery particle comprising a benefit agent core material and a shell encapsulating the core material is described, along with a process for forming such a delivery particle and articles of manufacture. The shell is the reaction product of a cross-linking agent and an acid-treated chitosan wherein the acid-treated chitosan is treated with a weak acid, or even a mixture of a first acid and a second acid, the first acid comprising a strong acid, and the second acid comprising a weak acid. The first acid and the second acid are present in a normality ratio from about 20:80 to about 80:20. The delivery particle of the invention has improved release characteristics, with enhanced degradation characteristics in OECD test method 301B.

Abstract: Biodegradable, controlled release microcapsules whose microcapsule walls comprise the reaction product of fractured plant proteins with isocyanates and/or bis- or poly-chloroformates.

Abstract: Controlled release biodegrading microcapsules comprising the reaction product of at least one protein component and a cross-linking component, the cross-linking component comprising at least one isocyanate and at least one of an acid dichloride, a chloroformate and/or a sulfonyl chloride.

Abstract: Core shell microcapsules are provided wherein the capsule shell is an interfacial copolymer formed of an amine modified polysaccharide cross-linked with an isocyanate.

Abstract: Novel articles of manufacture are described based on a combination of an adjunct material and microcapsules made by an improved process. The improved microcapsules are chitosan urea and encapsulate a benefit agent. The process comprises combining an adjunct material formed of microcapsules formed by a water phase comprising hydrolyzing chitosan in an acidic medium at a pH of 6.5 or less for an extended period and combining with a polyisocyanate. The reaction product of the hydrolyzed chitosan and polyisocyanate yields a microcapsule having improved release characteristics, with enhanced degradation characteristics in OECD test method 301B.

Abstract: Compositions that include benefit agent delivery particles, the particles having a core and a shell encapsulating the core, the shell including certain acrylate-based polymers. Processes for making and using such compositions.

Abstract: A population of core/shell delivery particles, where the shell is made, at least in part, of a polymeric material that is the reaction product of a plant-based flour material crosslinking an isocyanate monomer, oligomer, or prepolymer. Related methods of making and using such compositions are described.

Abstract: Populations of benefit agent delivery particles are disclosed, the particles having a core and a shell encapsulating the core, the shell comprising certain multifunctional (meth)acrylate-based polymers, along with processes for making and uses of such compositions. The delivery particle has a core to polymer wall ratio by weight from about 96:4 to about 99.5 to 0.5 and a volume-weighted particle size from about 30 to about 50 microns. The compositions deliver core content with a desired delivery profile, such as fragrance delivery at desired touchpoints with higher efficiency. The delivery particle has high pay load, yet exhibits decreased benefit agent leakage, and provides a desired delivery profile.

Abstract: The invention describes a core shell microcapsule wherein the capsule shell is an interfacial copolymer formed of a modified polysaccharide free radical cross-linked with a multifunctional (meth)acrylate. The polysaccharide is hydrophobically modified with an adduct containing at least one unsaturated bond. The modification imparts hydrophobic character to the polysaccharide to act as an emulsifier, driving the modified polysaccharide to an oil-water interface of an encapsulation emulsion described, and creates an active bonding site for free-radical polymerization between the polysaccharide and multifunctional (meth)acrylate, thereby forming a microcapsule shell surrounding the core material.

Abstract: The invention describes a core shell microcapsule wherein the capsule shell is an interfacial copolymer formed of a modified polysaccharide free radical cross-linked with a multifunctional (meth)acrylate. The polysaccharide is hydrophobically modified with an adduct containing at least one unsaturated bond. The modification imparts hydrophobic character to the polysaccharide to act as an emulsifier, driving the modified polysaccharide to an oil-water interface of an encapsulation emulsion described, and creates an active bonding site for free-radical polymerization between the polysaccharide and multifunctional (meth)acrylate, thereby forming a microcapsule shell surrounding the core material.

Abstract: Compositions comprising a population of delivery particles comprising a core and a polymer wall surrounding the core are disclosed. The delivery particles are obtainable by a process comprising the steps of providing core materials and wall-forming materials, and encapsulating the core materials in the polymer wall. The wall-forming materials comprise structural monomers and a free radical initiating agent. The core materials comprise a benefit agent and a shielding agent. The benefit agent comprises aldehyde-containing benefit agents, ketone-containing benefit agents, or a combination thereof. The shielding agent is capable of complexing with the aldehyde-containing benefit agents, ketone-containing benefit agents, or a combination thereof. The population of core/shell delivery particles formed has a weight ratio of the core materials and the wall polymer of at least 95:5. Related articles, methods of making and using such compositions and articles are also disclosed.

Abstract: An improved delivery particle comprising a benefit agent core material and a shell encapsulating the core material is described, along with a process for forming such a delivery particle and articles of manufacture. The shell is the reaction product of an ATEC (amine-thiol ene) conjugate, which can be further reacted with one or more multifunctional (meth)acrylates or isocyanates, or both.