DEFOAMING AGENT

The object of the present invention is to provide a defoaming agent that is superior in defoamabilities (initial defoamability and defoaming durability). The present invention is a defoaming agent comprising a bisamide (A) in dispersion in a polyether compound (B), wherein the content of the bisamid...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HISADA, NOBUO, IZUMI, YOSHIHIDE, MATSUMURA, YOHEI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES SEPARATION TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The object of the present invention is to provide a defoaming agent that is superior in defoamabilities (initial defoamability and defoaming durability). The present invention is a defoaming agent comprising a bisamide (A) in dispersion in a polyether compound (B), wherein the content of the bisamide (A) is 0.01 to 10% by weight and the content of the polyether compound (B) is 90 to 99.99% by weight based the weight of the bisamide (A) and the polyether compound (B), and the mode (µm) in the particle diameter distribution on a volume basis of the bisamide (A) is 0.1 to 5 µm. The bisamide (A) is preferably a bisamide represented by formula (1), R 1 -CONH(CH 2 ) t -NHCOR 1 (1) wherein R 1 is an alkyl group, an alkenyl group, a hydroxyalkyl group or a hydroxyalkenyl group having 10 to 22 carbon atoms, and t is an integer of 1. to 6.