| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of treating painting booth circulation water by which uncoated paint in the booth circulation water is sufficiently rendered non-adhesive, even if aqueous paint and/or oily paint are contained in the booth circulation water in the wet painting booth, foams are little generated and uncoated paint can be easily and efficiently separated and recovered. SOLUTION: When the aqueous paint and/or oily paint are contained in the booth circulation water of the wet painting booth, novolac type phenol resin expressed by general formula 1 (a methylol group may be bonded to a terminal benzene ring), a cation coagulant and a flocculant are added to the booth circulation water. COPYRIGHT: (C)2008,JPO&INPIT
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