Low foaming alkaline cleaner comprising a surfactant mixture of an EO-PO-EO block copolymer and a PO-ZO-PO block copolymer
August 8, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2650875 2882134 3882038 Method for cleaning tin surfaces Laundering with a nonionic detergent system at a temperature between the cloud point and the phase coalescence temperatures Low-foaming nonionic surfactants Metalworking with an aqueous synthetic lubricant containing polyoxypropylene-polyoxyethylene-polyoxypropylene block copolymers Cleaning and etching process for aluminum containers Highly alkaline cleaning dispersion Cleaning liquid and process of using same InventorsAssigneeApplicationNo. 565287 filed on 08/08/1990US Classes:510/254, For use on nonferrous surface (e.g., aluminum, copper, tin plate, etc.)252/79.5, Alkali metal hydroxide containing510/272, Alkali metal hydroxide component510/506, Ether510/535Surfactant composition for cleaning agents (other than raw soap)ExaminersPrimary: Lieberman, PaulAssistant: Swope, Bradley A. Attorney, Agent or FirmInternational ClassesC11D 007/06C11D 001/66 AbstractA cleaning and etching solution and method for metal surface is disclosed which is an alkaline formulation which includes a surfactant combination of a low foaming ethylene oxide - propylene oxide block copolymer surfactant and a defoaming reverse ethylene oxide - propylene oxide block copolymer. The preferred cleaner includes an alkali metal hydroxide, an alkali metal salt of gluconic acid and preferably an alkali tripolyphosphate and the surfactant combination. | |
