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The water-dispersible polymer can be dispersed in water to form a colloidal suspension or a polymeric solution. The fully hydrolyzed polyvinyl alcohol typically has a degree of hydrolysis of 96% or greater, and preferably, 98% or greater. The weight ratio between the fully hydrolyzed polyvinyl alcohol and the water-dispersible polymer is preferably 1:10 to 100:1 (e.g., 1:5 to 10:1 and 3:10 to 5:1). The capsules each have a particle size in the range of 0.1 to 1000 microns (e.g., 0.2 to 500 microns, 0.3 to 300 microns, 0.5 to 200 microns, 5 to 150 microns, 10 to 100 microns, and 20 to 70 microns). This invention is based on an unexpected discovery that certain capsules containing a fully hydrolyzed polyvinyl alcohol possess desirable properties including high perceived olfactory intensity.Īccordingly, one aspect of this invention relates to a capsule containing: (i) an oil core having an active material (e.g., a fragrance, flavor, malodor counteracting agent, and combination thereof) (ii) an capsule wall formed of a wall-forming material, the capsule wall encapsulates the oil core and (iii) a dispersant containing a fully hydrolyzed polyvinyl alcohol and a water-dispersible polymer, both of which are immobilized in the capsule wall.
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There is a need to develop a method for preparing capsule composition with optimized organoleptic/release profiles and particle sizes suitable for a wide variety of consumer applications. This process is not suitable for all capsule wall materials and also consumes a significant amount of energy. 6,890,592 teaches a process of preparing microcapsules having a substantially uniform size distribution by extruding a fragrance core oil through a membrane under high pressure. On the other hand, a small capsule can be hard to break or release a fragrance. A large capsule may not be able to maintain its physical integrity, making it unstable. Suitable capsules for fragrance deliver include those having a desired particle size range. In addition, known methods of preparing capsules can seldom control the capsule particle size, an important factor determining the release profile and stability of capsules. However, current capsule compositions do not provide optimized release profiles in all applications such as an intensive laundry washing cycle in a European washing machine. 6,248,703 discloses various agents including fragrance in an aminoplast shell that is included in an extruded bar soap.
#Chimex turmeric plus
5,145,842 discloses a solid core of a fatty alcohol, ester, or other solid plus a fragrance coated by an aminoplast shell. 5,112,688 discloses selected fragrance materials having the proper volatility to be coated by coacervation with microparticles in a wall that can be activated for use in fabric conditioning. 4,081,384 discloses a softener or anti-stat core coated by a polycondensate suitable for use in a fabric conditioner. In the capsules, polymeric walls protect the active material from evaporation, reaction, oxidation or otherwise dissipating prior to use. The delivery effectiveness of the active materials can be enhanced by encapsulating them in nano- or macro-capsules so that these materials are released at a desired time, e.g., at damp when a consumer open the door of a washing machine right after washing laundry. These active materials include fragrances, flavors, and malodor counteracting agents. BACKGROUNDĪctive materials are used in numerous products to enhance the consumer's enjoyment of the products such as laundry detergents, fabric softeners, soaps, personal care products including shampoos, body washes, deodorants and the like, as well as certain food products. The contents of both applications are incorporated herein by reference in their entirety. This application is a national stage entry under 35 USC 371 for International Application No.