US 11,746,309 B2
Alkaline warewash detergent composition comprising a terpolymer and methods to prevent foaming, filming and/or redeposition
David Alexander Riehm, St. Paul, MN (US); Carter Martin Silvernail, Burnsville, MN (US); Kelly Anne Gilmore, Apple Valley, MN (US); and John Matthew Chudomel, Aurora, IL (US)
Assigned to Ecolab USA Inc., Saint Paul, MN (US)
Filed by Ecolab USA Inc., Saint Paul, MN (US)
Filed on Mar. 13, 2019, as Appl. No. 16/352,326.
Claims priority of provisional application 62/642,441, filed on Mar. 13, 2018.
Prior Publication US 2019/0284505 A1, Sep. 19, 2019
Int. Cl. C11D 1/66 (2006.01); C11D 1/722 (2006.01); C11D 1/825 (2006.01); C11D 3/10 (2006.01); C11D 3/37 (2006.01); C11D 3/386 (2006.01); B08B 3/04 (2006.01); C11D 3/04 (2006.01); C11D 11/00 (2006.01)
CPC C11D 3/10 (2013.01) [C11D 1/825 (2013.01); C11D 3/044 (2013.01); C11D 3/3707 (2013.01); C11D 3/378 (2013.01); C11D 3/3761 (2013.01); C11D 3/386 (2013.01); C11D 11/0035 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An alkaline detergent composition, comprising: 1 wt-% to 80 wt-% of an alkalinity source comprising an alkali metal; and 1-wt % to 15 wt-% of a terpolymer comprising acrylic acid and maleic acid or acrylic acid and itaconic acid; and 2-acrylamido methylpropane sulfonic acid, vinyl sulfonic acid, styrene sulfonic acid, allyl sulfonic acid or methallyl sulfonic acid, wherein a) the alkalinity source comprises an alkali carbonate, an alkali metal hydroxide, or both, and the terpolymer comprises 80 wt-% to less than 85% wt-% acrylic acid, 10% wt-% to 19 wt-% maleic acid, and 1 wt-% to 15 wt-% 2-acrylamido 2-methyl propane sulfonic acid, vinyl sulfonic acid, styrene sulfonic acid, allyl sulfonic acid or methallyl sulfonic acid, b) the alkalinity source comprises an alkali carbonate, an alkali metal hydroxide, or both, and the terpolymer comprises 80 wt-% to 90 wt-% acrylic acid, 5 wt-% to 20% wt-% itaconic acid, and 5% wt-% to 10% wt-% 2-acrylamido 2-methylpropane sulfonic acid, vinyl sulfonic acid, styrene sulfonic acid, allyl sulfonic acid or methallyl sulfonic acid; or c) the alkalinity source comprises an alkali metal hydroxide and the terpolymer comprises 70 wt-% to 80 wt-% acrylic acid, 10 wt-% to 20 wt-% maleic acid and 1 wt-% to 15 wt % 2-acrylamido 2-methylpropane sulfonic acid, vinyl sulfonic acid, styrene sulfonic acid, allyl sulfonic acid or methallyl sulfonic acid, wherein the composition lacks a water soluble silicate, and wherein the terpolymer has a molecular weight of about 1,000 to about 50,000.