ANTI-FOAMING AGENT AND AQUEOUS COATING COMPOSITION

WIPO Patent Application WO/2021/111800

A1

The purpose of the present invention is to provide an anti-foaming agent that exhibits excellent anti-foaming properties in a coating material applied using a roller. The present invention is an anti-foaming agent which contains a polyoxyalkylene compound A represented by formula 1 and a compound B represented by formula 5, with the weight ratio of compound A and compound B being 50:50-1:99. Formula (1): S1-G(-P-G-S2-G)q-P-G-S1. S1 is a group represented by formula 2, S2 is a group represented by formula 3, G is a diglycidyl ether reaction residue, P is a group represented by formula 4, and q is 0, 1 or 2. (2) (3) (4) Q is a non-reductive disaccharide/trisaccharide reaction residue, OA is an oxyalkylene group, R1 is an alkylene/arylene group, n is 2-30, t is 2-4, m is 1-20, and the total number of OA in S1 units and S2 units is 10-50. Formula (5): R2{-(OA)a-X}b. R2 is an active hydrogen compound reaction residue, X is a hydrogen atom or an acyl group, a is 1-50, and b is 1-6.

WO/1997/031694	METHOD FOR SUPPRESSING FOAMS IN BOOTH CIRCULATION WATER
WO/1995/002669	POURABLE PHOSPHATE-FREE FOAM-CONTROL AGENT
JP3243579	DEFOAMING DEVICE

SUZUKI SYOUGO (JP)
KITAMURA TAKUMI (JP)

PCT/JP2020/041458

June 10, 2021

November 06, 2020

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SAN NOPCO KK (JP)

B01D19/04; C08G65/04; C09D7/63

WO2016136437A1

2016-09-01

JP2011241354A	2011-12-01
JP2011195606A	2011-10-06
JP2014233721A	2014-12-15
JPS63132935A	1988-06-04

SAKURAI Ken-ichi (JP)

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