Patent ID: 6512016
Filing Date: 2003-01-28
Classification: B01D,C09D

Abstract:
A defoaming composition consisting essentially of:A) at least one organosilicone compound which has defoaming activity in aqueous-based compositions; and B) at least one base-catalyzed reaction product consisting essentially of the following reactants: a) a linking agent of formula I R4(Y)3â€ƒâ€ƒ(I) â€ƒwherein each Y group is a halogen atom or one Y group is a atom and two Y groups with two adjacent carbon atoms in the R4 group and an oxygen atom form an epoxy group, and R4 is an alkanetriyl group containing from 3 to 10 carbon atoms; and b) a compound of formula II R3(EO)n(PO)m(BO)pXâ€ƒâ€ƒ(II) â€ƒwherein R3 is a substituted or unsubstituted, saturated or unsaturated, organic oxy or thio group having from 1 to 36 carbon atoms or a secondary amino group having from 2 to 36 carbon atoms; n is a number of from 0 to about 50; m is a number of from 0 to about 50; p is a number from 0 to about 50; and X is hydrogen, or X can be a mercapto group or an amino group in place of a terminal â€”OH group, provided that when X is mercapto or amino, the sum of n, m, and p must be at least 1; and the mole ratio of formula (I):(II) is from about 0.6:1 to about 5:1.