Inorganic persulfate cleaning solution for acoustic materials
AssigneeCeil Clean Corporation, Inc.
InventorJeffrey J. King
Life of this patent
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Abstract
A stable, cleaning solution for acoustic material such as porous tile, fabric, etc., is disclosed that contains an inorganic oxidizer, such as ammonium persulfate as the active ingredient in the solution, that may be applied by spraying. Potable tap water is used as the diluent, and various ingredients are utilized in the cleaning solution to clean the tile and maintain the solution as a clear, single phase solution having a relatively long term activity life of about 5-10 days, at a pH typically at least about 8-9.
Claims14
A method for cleaning acoustic material with a water soluble oxidizing agent selected from the class consisting of ammonium persulfate and alkali metal persulfates, consisting of the steps of:
- i. forming a stable, aqueous first solution having the following components, with the approximate concentrations:
- a. cleaning detergent consisting of a surfactant and emulsifier:
- 0.5%-3.0%;
- b. chelating agent comprising a salt of hydroxyethyl ethylene diamine triacetic acid or ethylene diamine tetraacetic acid:
- 0.3%-0.3%;
- c. inorganic soil suspender selected from the class consisting of tetrapotassium pyrophosphate, sodium tripolyphosphate, Na or K hexametaphosphate, and Na or K silicates:
- 0.1%-4.0%;
- d. hydrotrope selected from the class consisting of Na or K xylene sulfonate phosphate ester surfactants and mixtures thereof:
- 0.5%-3.0%;
- e. water miscible solvent:
- 1.0%-6.0%;
- f. a base in sufficient quantity to adjust the cleaning solution pH to at least 8-9;
- g. H.sub.2 O of potable quality:
- dilution to balance;
- ii. converting the oxidizing agent from a solid form into a second aqueous solution;
- iii. mixing the first and second solutions to form a cleaning solution having a stability period of at least about 5 to 10 days, the concentration of the oxidizing agent in the cleaning solution being approximately 2.0%-10%, the cleaning detergent being non-reactive with the oxidizing agent;
- iv. physically removing a portion of dirt material from the acoustic material;
- and,
- v. applying the cleaning solution to the acoustic material during the stability period to partially dissolve, and redistribut the dirt to a neutral color, and allowing the solvent and water to evaporate;
- the hydrotrope being adapted to maintain the aqueous solution in a single phase, and to stabilize a solution of the oxidizing agent when combined with the components of the first solution.
A cleaning solution for acoustic material containing (i) a solution of an oxidizing material selected from the class consisting of:
- ammonium persulfate, sodium persulfate and potassium persulfate and, (ii) a stable, aqueous solution containing the following components:
- a cleaning detergent consisting of a surfactant or emulsifier, a soil suspender comprising tetrapotassium pyrophosphate, sodium tripolyphosphate, Na or K hexametaphosphate, or Na or K silicates, a water miscible solvent, a chelating agent comprising a salt of ethylene diamine tetraacetic acid or hydroxyethyl ethylene diamine triacetic acid, a pH adjusting agent, and a hydrotrope selected from the class consisting of Na or K xylene sulfonate, phosphate ester surfactants and mixtures thereof to maintain the aqueous solution in a single phase and to stabilize a solution of the oxidizing agent and the solution of the said components, the cleaning solution having a stability period of about 5 to 10 days, the cleaning detergent being nonreactive with the oxidizer.
Dependencies are inferred from the claim text.