Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...
Patent
1994-06-01
1997-12-09
Silverberg, Sam
Cleaning and liquid contact with solids
Processes
For metallic, siliceous, or calcareous basework, including...
134 28, B23K 100
Patent
active
056955715
ABSTRACT:
The defluxing agent for flux residue after soldering contains an acid (preferably an organic acid, and particularly an acid stronger than abietic acid; for example, acrylic acid, acetic acid, propionic acid, benzoic acid) and an organic solvent (for example, xylene, benzyl acetate, methyl .alpha.-hydroxyisobutyrate, cyclohexanone, methyl .beta.-methoxyisobutyrate), and if necessary it further contains a monohydric alcohol, a surfactant and a corrosion inhibitor. Rinsing is preferably performed after the cleaning, using a solvent which is miscible with the defluxing agent, in order to completely remove the acid. There is also disclosed a cleaning apparatus which may be generally used for this and other cleaning.
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Igusa Nobuo
Ochiai Masayuki
Takachi Isamu
Watanabe Keiji
Yamagishi Yasuo
Fujitsu Limited
Silverberg Sam
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