US 11,920,110 B2
Automatic dishwashing composition with dispersant polymer
Scott Backer, Phoenixville, PA (US); Marianne Creamer, Warrington, PA (US); Randara Pulukkody, Landsdale, PA (US); and Severine Ferrieux, Grasse (FR)
Assigned to Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
Appl. No. 17/272,508
Filed by Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
PCT Filed Oct. 8, 2019, PCT No. PCT/US2019/055134
§ 371(c)(1), (2) Date Mar. 1, 2021,
PCT Pub. No. WO2020/086257, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 18290123 (EP), filed on Oct. 22, 2018.
Prior Publication US 2021/0324304 A1, Oct. 21, 2021
Int. Cl. C11D 1/72 (2006.01); C11D 1/66 (2006.01); C11D 3/04 (2006.01); C11D 3/06 (2006.01); C11D 3/08 (2006.01); C11D 3/10 (2006.01); C11D 3/36 (2006.01); C11D 3/37 (2006.01); C11D 3/386 (2006.01); C11D 11/00 (2006.01)
CPC C11D 3/3761 (2013.01) [C11D 1/66 (2013.01); C11D 1/72 (2013.01); C11D 3/046 (2013.01); C11D 3/08 (2013.01); C11D 3/10 (2013.01); C11D 3/361 (2013.01); C11D 3/3757 (2013.01); C11D 3/3765 (2013.01); C11D 3/386 (2013.01); C11D 11/0023 (2013.01)] 10 Claims
 
1. An automatic dishwashing composition, comprising:
a builder;
a phosphonate;
a nonionic surfactant; and
a dispersant polymer, comprising:
(a) 2 to 20 wt % of structural units of formula I

OG Complex Work Unit Chemistry
wherein each R1 is independently selected from a hydrogen and a —C(O)CH3 group; and
(b) 82 to 98 wt % of structural units of formula II

OG Complex Work Unit Chemistry
wherein each R2 is independently selected from a hydrogen and a —CH3 group; wherein the dispersant polymer comprises ≤1 wt % of structural units of sulfonated monomer; and
wherein the automatic dishwashing composition contains ≤0.1 wt % of dispersant polymer having a lactone end group and wherein the dispersant polymer has a weight average molecular weight of 1,500 to 10,000 Daltons.