POWDER ANTIFOAMING AGENT AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2013/073329

A1

The present invention relates to a powder antifoaming agent which contains: (A) a hydrophobic organopolysiloxane that has a viscosity at 25˚C of 10-100,000 mm2/s; (B) a fine silica powder; (C) a surfactant; and (D) a water-soluble encapsulating agent that is in a solid state at 25˚C. This powder antifoaming agent is characterized by being obtained by spray drying a dispersion liquid that is obtained by dispersing a silicone oil compound, which is obtained by mixing the component (A) and the component (B), and the component (D) in water in the presence of the component (C), and is also characterized in that the silicone oil compound is encapsulated by the component (D) that serves as an outer shell. Since the powder antifoaming agent of the present invention does not contain water by being produced by a spray drying method, the powder antifoaming agent is free from problems of emulsion antifoaming agents such as separation and putrefaction, thereby exhibiting extremely excellent storage stability.

JP6930912	Hydrophilic ethylene oxide-free emulsifier containing dendrimer-like polyhydroxyester moiety
WO/1993/019150	LOW-FOAMING SURFACE-ACTIVE MIXTURE
WO/2021/011484	SYSTEM AND METHOD FOR OPTIMIZATION OF THE FERMENTATION PROCESS

SAKURAI TAKATO (JP)
IRIFUNE SHINJI (JP)

PCT/JP2012/076892

May 23, 2013

October 18, 2012

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SHINETSU CHEMICAL CO (JP)

B01D19/04; A23L29/00

JPH02293005A	1990-12-04
JPS6142309A	1986-02-28
JPS60106507A	1985-06-12
JP4224535B2	2009-02-18
JPH0442043B2	1992-07-10
JPH05261206A	1993-10-12
JP2005324140A	2005-11-24

See also references of EP 2781247A4

KOJIMA TAKASHI (JP)
Takashi Kojima (JP)

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