Dispersant polymer for autodish formulations

US11292991B2 · kind B2 · utility

Assignees

• DOW GLOBAL TECHNOLOGIES LLC · US
• Rohm and Haas Company · US

Inventors

• Lin Wang · Furlong, US
• Anurima Singh · Audubon, US
• Scott Backer · Phoenixville, US
• Wei Gao · Fort Washington, US
• Steven Arturo · Wyncote, US
• Ivan A. Konstantinov · Lake Jackson, US
• Paul Mercando · Pennsburg, US

Key dates

• Filing date: Oct 18, 2018
• Grant date: Apr 5, 2022
• Expiry date: Dec 17, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D2111/14
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An automatic dishwashing composition is provided including a builder selected from the group consisting of carbonate, bicarbonate, citrate, silicate and mixtures thereof; a nonionic surfactant; and a dispersant polymer comprising: (a) 5 to 75 wt % of structural units of itaconic acid; (b) 10 to 85 wt % of structural units having formula I wherein each R3 is independently selected from a hydrogen and a —C(O)CH3 group; and (c) 10 to 65 wt % of structural units of (meth)acrylic acid; wherein the dispersant polymer has a lactone end group and wherein the dispersant polymer has a weight average molecular weight of 1,500 to 6,000.