Patent ID: 6479444
Filing Date: 2002-11-12
Classification: C11D

Abstract:
An in-situ foaming drain cleaner comprising(a) a first aqueous liquid, having a viscosity of at least about 100 cP, a relative elasticity of about at least about 1 sec/Pa and a relaxation time of at least about 0.3 sec, the first liquid comprising an oxidant, and a surfactant; (b) a second aqueous liquid, having a viscosity of at least about 50 cP, a relative elasticity of at least about 1 sec/Pa and a relaxation time of at least about 0.1 sec, the second liquid comprising a gas-generating agent and a surfactant; and wherein the second aqueous liquid is denser than the first aqueous liquid and the first and second aqueous liquids are disposed in a dual chamber container such that they are separately maintained prior to forming an admixture during delivery to a drain to be treated, whereupon the admixture generates a foam sufficient for cleaning efficacy and stability.