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US RE35,115 EGranted
Low foaming effective hydrotrope
AssigneeChurch & Dwight Co., Inc.
InventorsAnthony E. Winston, Francis R. Cala, Steven E. Dunn, Alfredo Vinci, M. Stephen Lajoie
Life of this patent
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Abstract
The present invention relates to environmentally safe aqueous cleaning compositions comprising alkaline salts, organic adjuvants and a hydrotrope comprised of alkali metal salts of carboxylic acids having a chain length of 7-13 carbon atoms so as to maintain the organic adjuvant in solution.
Claims22
A method for removing soldering flux alone or with other residues from a printed wiring board, comprising
- (a) contacting the board with an aqueous flux removing solution comprising from about 0.1 to 15 percent by weight of a flux removing composition comprising alkaline salts, at least one organic adjuvant and a hydrotrope to maintain said adjuvant in solution, said solution having a pH of from about 10 to 13;
- (b) allowing the contact to continue for sufficient time to emulsify and remove the soldering flux [or] and the other residues if present ;
- and
- (c) removing the combined composition and the soldering flux [or] and the other residues from the board.
1 more element
Dependencies are inferred from the claim text.