Title:
DEFOAMING AGENT
Document Type and Number:
WIPO Patent Application WO/2012/164741
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a defoaming agent having exceptional defoaming properties across a wide temperature range and having exceptional product stability. The present invention is a defoaming agent characterized in having, as essential components, hydrophobic dry silica (S) obtained by hydrophobizing silica obtained using a dry method and having a primary particle diameter of 5-100 nm, water, and a hydrophobic liquid (Q) containing 1-25% by weight of an ester compound (E) expressed by the formula (R1-COO)p-D, where: R1 is an alkyl or an alkenyl; D is a residue excluding a hydroxyl contributing to an ester bond from a compound (D') containing 2 to 6 carbon atoms and 1 to 6 hydroxyls, or a residue excluding a hydroxyl contributing to a ester bond from an adduct obtained by adding alkylene oxide to the compound (D'); and p is an integer from 1 to 3.
Inventors:
ANDO TSUYOSHI (JP)
Application Number:
PCT/JP2011/062796
Publication Date:
December 06, 2012
Filing Date:
June 03, 2011
Export Citation:
Assignee:
SAN NOPCO KK (JP)
ANDO TSUYOSHI (JP)
ANDO TSUYOSHI (JP)
International Classes:
B01D19/04
Foreign References:
| JPH10286404A | 1998-10-27 | |||
| JP2007222812A | 2007-09-06 | |||
| JPS5013282A | 1975-02-12 | |||
| JPH06508548A | 1994-09-29 |
Attorney, Agent or Firm:
SAKURAI, KEN-ICHI (JP)
Ken-ichi Sakurai (JP)
Ken-ichi Sakurai (JP)
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