Aqueous cleaning method and composition with nonionic surfactant

Details Aqueous cleaning method and composition with nonionic surfactant Aqueous cleaning method and composition with nonionic surfactant

1995-02-21

1996-09-24

McGinty, Douglas J.

Cleaning and liquid contact with solids

Processes

Miscellaneous

134 2, 134 40, 510175, 510176, B08B 302, B08B 308, C11D 1825, C11D 183

Patent

active

055581099

ABSTRACT:
A cleaning composition for removing water soluble flux residues from circuit assemblies comprises a surfactant formulation containing three nonionic surfactants which have cloud points which differ by at least 5.degree. F. from each other so as to provide optimum cleaning performance over a broadened temperature range. The surfactant formulation is preferably in the form of an aqueous concentrate which further contains alkaline salts, a corrosion inhibitor, a carboxylated polymer stabilizer to maintain the corrosion inhibitor in solution and a hydrotrope to maintain the surfactants in solution.

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Cala, Frank, et al., "Effective Cleaning at Low Wash Temperatures", Surface Mount Technology, pp. 1-3.

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