Abstract: The combination of an enzyme substrate and an enzyme capable of accelerating the modification of said substrate, provides a triggered release system which works especially well. The use of the enzyme-triggered release system can retain a rinse benefit agent during the wash stage and release it during the subsequent rinse stage.

Abstract: A particle for the absorption of odiferous compounds, wherein the particle comprises: (a) a solid core comprising a first hydrophobic polymer, and (b) a shell comprising a second hydrophobic polymer wherein the Tg of the first hydrophobic polymer is lower than the Tg of the second hydrophobic polymer; wherein the particles have a mean particle size of less than micron, preferably from 0.1 to 0.3 microns, wherein the odiferous compound is a malodour compound and wherein the ratio of (a):(b) is greater than 2:1.

Abstract: Disclosed are gel compositions that include (a) polyhydric alcohol, (b) water, (c) gelling agent, (d) fragrance-delivery particles having i) at least one shell formed by a step-growth polymerization reaction, ii) interior said shell, a core comprising at least one region formed by chain-grown polymerization of selected monomers, iii) optionally, surfactant grafted to said shell, wherein the fragrance delivery particles have an average diameter of less than 20 microns, and (e) free fragrance, wherein the compositions are in the form of deodorant gel sticks.

Abstract: The combination of an enzyme substrate and an enzyme capable of accelerating the modification of said substrate, provides a triggered release system which works especially well. The use of the enzyme-triggered release system can retain a rinse benefit agent during the wash stage and release it during the subsequent rinse stage.

Abstract: The invention relates to a process for the manufacture of core-shell perfume particles by emulsion polymerisation and to the products obtainable by such a process. The core of the particles comprises a perfume and the shell (which preferably comprises an aminoplast polymer) also comprises a non-ionic deposition aid (such as locust bean gum) which is substantive to textiles. The process of the invention is characterised in that, during the emulsion polymerisation step, the solids content of the polymerisation mixture does not fall below 25% wt. The particles obtained by the process are suitable for inclusion in laundry products and show significantly improved deposition and retention onto fabrics being laundered as compared with particles formed at lower solids levels.

Abstract: Alkenes can be expoxidized with hydrogen peroxide using a homogeneous heavy metal catalyst, but discharge of spent reaction mixtures releases the heavy metal in the environment. The problem can be ameliorated by selecting a heterogeneous catalyst system comprising a tungsten-containing heteropolyacid supported on selected Group IIa, IIb, IVa or IVb inorganic supports or on a strong basic resin, which catalyst has either been calcined after impregnation of in the impregnation stage an alcoholic solution of the heteropolyacid is employed and by employing a nitrilo or oxygenated polar solvent reaction medium. A number of preferred heteropolyacids satisfy the empirical formula M.sub.3/n PW.sub.w MO.sub.12-w O.sub.40 in which w represents an integer of at least 1, M represents a counterion and n its basicity. Preferred supports include activated alumina, calcined at 400.degree. to 600.degree. C. and cross-linked quaternary ammonium-substituted polystyrene resins.

Abstract: Hydroxylation of phenol is prone to the production of tarry by-products. Selective hydroxylation of phenol can be obtained by reacting a limited amount of hydrogen peroxide with phenol in solution in a compatible organic solvent and in the presence of a catalyst that is at least partly soluble in the reaction medium and is the salt of a heteropolyacid of general formula: i) Q.sub.3 PMo.sub.m W.sub.12-m O.sub.40 or ii) Q.sub.3+v PM.sub.n V.sub.v O.sub.40, in which Q represents a compatible organic cation, m is zero or an integer less than 6, M represents molybdenum or tungsten, v is an integer which is up to 3, and n is an integer such that n+v=12. A preferred organic cation comprises cetyl pyridinium. Selectivity towards catechol is particularly observed employing heteropolyacid salts in which m=0 in formula i) and when n=11 and M=tungsten in formula ii) and towards hydroquinone when n=11 and M=molybdenum in formula ii). Preferably the reaction medium comprises acetonitrile.