Abstract: A method of encapsulation of an active comprising (a) dispersing an active in an aqueous medium having a pH of less than 6; (b) causing the formation on this dispersed active of a polymer shell, the formation comprising the sequential deposition of a series of polymeric layers, each layer being capable of hydrogen bonding with the preceding layer; to form an aqueous slurry of active-containing capsules; characterised in that one of the first two layers is a polycarboxylic acid and that the first two to four layers taken together exhibit an interfacial compression dilation modulus of greater than 10 mN/m. The method allows the precise tailoring of polymeric shells, allowing capsules walls to be much thinner without a loss of strength. The technique is especially useful for the encapsulation of fragrances and flavours.

Abstract: Perfume composition provided in the form of a plurality of dispersed perfume-containing droplets, suspended in an aqueous dispersing medium, said perfume droplets being mono-dispersed and having a diameter of 200 micrometers to 4000 micrometers, wherein said droplets comprise more than 60 wt %, of perfume ingredients, and wherein 25 wt or less of said perfume ingredients are linear or branched alkyl alcohols and/or alkenyl alcohols; 10 wt % or less of the perfume ingredients are aldehydes; and 10 wt % or less of the perfume ingredients have a ClogP less than 2.1.

Abstract: Core-shell capsules comprising a fragrance-containing core and a shell formed around said core, wherein the shell is formed of polycarboxylic acid having a molecular weight of 1,000 to 10,000,000 Daltons

Abstract: Perfume composition provided in the form of a plurality of dispersed perfume-containing droplets, suspended in an aqueous dispersing medium, said perfume droplets being mono-dispersed and having a diameter of 200 micrometres to 4000 micrometres, wherein said droplets comprise more than 60 wt %, of perfume ingredients, and wherein 25 wt or less of said perfume ingredients are linear or branched alkyl alcohols and/or alkenyl alcohols; 10 wt % or less of the perfume ingredients are aldehydes; and 10 wt % or less of the perfume ingredients have a ClogP less than 2.1.

Abstract: Core-shell capsules comprising a fragrance-containing core and a shell formed around said core, wherein the shell is formed of polycarboxylic acid having a molecular weight of 1,000 to 10,000,000 Daltons

Abstract: A method of encapsulation of an active comprising (a) dispersing an active in an aqueous medium having a pH of less than 6; (b) causing the formation on this dispersed active of a polymer shell, the formation comprising the sequential deposition of a series of polymeric layers, each layer being capable of hydrogen bonding with the preceding layer; to form an aqueous slurry of active-containing capsules; characterised in that one of the first two layers is a polycarboxylic acid and that the first two to four layers taken together exhibit an interfacial compression dilation modulus of greater than 10 mN/m. The method allows the precise tailoring of polymeric shells, allowing capsules walls to be much thinner without a loss of strength. The technique is especially useful for the encapsulation of fragrances and flavours.