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US 6,583,185 B2Granted
Defoamers for aqueous systems
AssigneeCognis Corporation
InventorsMichael S. Wiggins, Ronald W. Broadbent
Life of this patent
Estimating the term…
Abstract
The products of the reaction of epichlorohydrin and compounds having the formula II R3(EO)n(PO)mOH (II) wherein R3 is an alkyl, alkenyl or arenyl group having from 4 to 22 carbon atoms; a substituted alkyl or alkenyl group having from 4 to 22 carbon atoms wherein; n is a number from 0 to 50 and m is a number from 0 to 50; wherein the mole ratio of epichlorohydrin to (II) is from about 0.60/1 to about 2/1 are used in defoaming compositions for defoaming aqueous systems such as latex paints.
Claims30
A composition comprising:
- (a) the product of the process which comprises reacting reactants consisting essentially of epichiorohydrin and a compound of the formula II
- R3(EO)n(PQ)mQH (II)
- wherein
- R3 is a saturated or unsaturated aliphatic group having from 4 to 22 carbon atoms;
- n is a number from 0 to about 50 and m is a number from 0 to 50;
- EQ means ethyleneoxy;
- and
- PO means propyleneoxy;
- wherein the mole ratio of epichiorohydrin to (II) is from about 0.6011 to about 2/1;
- (b) a hydrophobic solid;
- (c) a water-insoluble liquid carrier capable of dissolving or dispersing component (a).
8 more elements
A process for making a defoamer comprising the steps of:
- (1) mixing
- (a) the product of the process which comprises reacting reactants consisting essentially of epichiorohydrin and a compound of the formula II
- R3(EO)n(PO)mOH (II)
- wherein
- R3 is a saturated or unsaturated aliphatic group having from 4 to 22 carbon atoms;
- n is a number from 0 to about 50 and m is a number from 0 to 50;
- EQ means ethyleneoxy;
- and
- PO means propyleneoxy;
- wherein the mole ratio of epichiorohydrin to (II) is from about 0.60/1 to about 2/1,
- (b) a hydrophobic solid, and
- (c) a first portion of a water-insoluble liquid carrier capable of dissolving or dispersing component (a) at a temperature sufficient to melt the hydrophobic solid;
- (2) adding the mixture of step (1) to a second portion of the water-insoluble liquid carrier.
10 more elements
Dependencies are inferred from the claim text.