Stain treating composition
A two-compartment dispenser comprising a first compartment containing an aqueous composition comprising a source of active oxygen and a second compartment containing an aqueous composition comprising an alkalising agent.
1 . A process for stain removal at a surface, comprising applying to that surface an aqueous composition, which composition has a pH of 7 or more and comprises a mixture of:
component (a): an aqueous composition comprising a source of active oxygen and having a pH of greater than 0 but less than 7 and
component (b): an aqueous composition comprising an alkalising agent.
2 . A process according to claim 1 wherein components (a) or (b) additionally comprise at least one surfactant or water-soluble polymer.
3 . A process according to claim 2 wherein component (b) additionally comprises at least one enzyme.
4 . A process according to claim 2 wherein the surfactant is a non-ionic surfactant.
5 . A process according to claim 4 wherein component (a) or component (b) additionally contains a polycarboxylate.
6 . A process according to claim 1 wherein the pH of component (b) is greater than 9.
7 . A process according to claim 1 wherein component (b) contains a pH buffer.
8 . A process according to claim 1 wherein component (b) additionally comprises an effervescent agent.
9 . A process according to claim 8 wherein the effervescent agent is a base or is a peroxide reducing enzyme.
10 . A process according to claim 9 wherein the base is a carbonate or a bicarbonate.
11 . A process according to claim 2 wherein the surfactant produces a foam upon mixing components (a) and (b).
12 . A process according to claim 11 wherein the foam breaks.
13 . A process according to claim 11 wherein the foam reduces in volume by at least 50% in less than 5 minutes of its generation without any form of physical or chemical intervention.
14 . A process according to claim 2 wherein surfactant is a nonionic surfactant having an HLB of greater than 10.
15 . A two-compartment dispenser comprising a first compartment containing an aqueous composition comprising a source of active oxygen and having a pH of greater than 0 but less than 7;
a second compartment containing an aqueous composition comprising an alkalising agent; and
dispensing means adapted to dispense the contents (or part thereof) of the compartments on to a surface either sequentially or simultaneously to form a mixture thereof.