Cleaning compositions
AssigneeAspen Pumps Limited
InventorsKajally Jobe, Christopher John Gee
Life of this patent
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Abstract
The present invention relates to cleaning compositions, in particular to cleaning compositions for use in heating, ventilation and air-conditioning (HVAC) installations. We describe an acidic cleaning composition concentrate comprising: at least one acid having a pKa1 of 4 or less, wherein the at least one acid is at least one organic acid and/or non-oxidising mineral acid; a rheology modifier, and a polar protic solvent. In some examples, compositions may also include at least one of one or more weak nitrogenous bases, one or more carboxylate salts and one or more surfactants.
Claims17
A gelled acidic cleaning composition for use in heating, ventilation and air-conditioning (HVAC) installations, the composition comprising:
- i) at least one acid having a pKa1 of 4 or less, wherein the at least one acid is at least one of an organic acid and a non-oxidising mineral acid;
- ii) a rheology modifier that is a polyurethane or polyacrylate copolymer;
- and
- iii) a polar protic solvent;
- wherein the at least one acid is present in an amount of 35 to 75 wt. % and the rheology modifier is present in an amount of 5 to 20 wt. %, based on the total weight of the composition, and wherein the composition has an acid molarity based on the total amount of the at least one acid of 5M to 15M at 25° C.
Dependencies are inferred from the claim text.