US 12,269,941 B2
Surfactant stabilization of hygroscopic species
Emily Chen, Saint Paul, MN (US); Derrick Anderson, Saint Paul, MN (US); David Dotzauer, Saint Paul, MN (US); and Erik C. Olson, Saint Paul, MN (US)
Assigned to ECOLAB USA INC., Saint Paul, MN (US)
Filed by ECOLAB USA INC., Saint Paul, MN (US)
Filed on Jun. 26, 2020, as Appl. No. 16/946,555.
Claims priority of provisional application 62/868,058, filed on Jun. 28, 2019.
Prior Publication US 2020/0407544 A1, Dec. 31, 2020
Int. Cl. C08L 33/08 (2006.01); C08K 5/17 (2006.01); C08K 5/42 (2006.01)
CPC C08L 33/08 (2013.01) [C08K 5/175 (2013.01); C08K 5/42 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for stabilizing a water conditioning agent into a stable solid composition comprising:
combining a water conditioning agent comprising from 22 wt-% to 26 wt-% of a chelant water conditioning agent comprising methylglycinediacetic acid (MGDA) and from 49 wt-% to 51 wt-% of a polycarboxylic acid polymer, copolymer and/or terpolymer (or salts thereof), and from 7.5 wt-% to 10 wt-% of a stabilizing surfactant comprising an amine oxide amphoteric surfactant to form a stable solid composition;
wherein the stable solid composition is pressed, cast or extruded;
wherein the stable solid composition does not comprise sodium carbonate; and
maintaining the stable solid composition, wherein the stable solid composition has less than 5% change in thickness and diameter when heated to a temperature of 40° C. for two weeks with 65% humidity.