Detergent compositions and components thereof
Detergent compositions comprising bleach catalysts or perfumes are disclosed. In particular, components comprising the bleach catalysts or perfumes are disclosed. In particular, the bleach catalysts are formed into stable particles having low moisture content and low moisture pick-up. Particles are also described having low surface area. Particles containing bleach catalysts or perfumes are also described comprising a protective agent which reacts with water to form non-water reaction products, particularly preferred protective agents being bleach activators.
1. A particle comprising
a.) a bleach catalyst or ligand thereof;
b.) a protective agent; and
c.) a coating, said coating comprising an inorganic component, selected from the group consisting of silica, sodium carbonate, zeolite, titanium di-oxide, or mixtures thereof;
said particle, when measured without said optional coating, having a moisture content of less than 0.5 wt %, and a moisture pick-up of no greater than 0.5 wt %.
2. A particle comprising:
a.) a bleach catalyst or ligand thereof;
b.) a protective agent; and
c.) a coating, said coating comprising an inorganic component, selected from the group consisting of silica, sodium carbonate, zeolite, titanium di-oxide or mixtures thereof;
said particle, when measured without said optional coating, having a surface area of no greater than 0.6 m 2 /g, and a median particle size from 200 to 1000 μm.
3. A particle according to claim 1 , comprising a stabilising agent.
4. A particle according to claim 1 , wherein the protective agent comprises reactant for water.
5. A particle according to claim 4 , wherein said protective agent comprises a protective agent that reacts with water to form a bleach catalyst stabilising agent.
6. A particle according to claim 5 , wherein the stabilising agent is an organic acid comprising at least 6 carbon atoms.
7. A particle according to claim 5 , wherein said stabilising agent is an acid having a pKa below 2.
8. A particle according to claim 1 , wherein said protective agent comprises a bleach activator.
9. A particle according to claim 8 , wherein said bleach catalyst or component thereof is present in the particle in an amount of from 0.001 wt % to 35 wt % by weight of said particle.
10. A particle according to claim 1 , wherein the protective agent is present in the particle in an amount of from 50 to 99.99 wt % by weight of said particle.
11. A particle according to claim 1 , wherein said coating comprises one or mixtures of more than one hydrophobic coating material selected from saturated or unsaturated materials.
12. A particle according to claim 1 , wherein said inorganic component comprises a micronised, inorganic component having a weight average particle size of less than 25 microns.
13. A detergent composition comprising a particle according to claim 1 .
14. A detergent composition according to claim 13 , comprising from 0.005 to 5 wt % of said particles.
15. A method for cleaning fabrics comprising contacting the fabrics with an aqueous solution comprising a particles according to claim 1 .
16. A particle according to claim 1 , having a moisture content of less than 0.25 wt % and a moisture pick-up of no greater than 0.2 wt %.
17. A particle according to claim 2 , said particle, when measured without said coating, having a surface area of no greater than 0.4 m 2 /g.
18. A particle according to claim 1 , comprising a stabilising agent that is an acid.
19. A particle according to claim 11 , wherein said coating comprises a material selected from the group consisting of saturated, paraffin wax, fatty acid, fatty soaps, fatty esters, mono-, di- or tri- glycerides and mixtures thereof.