Dispersant system for automatic dish washing formulations

Patent metadata

Field	Value
Publication number	US-11427790-B2
Application number	US-201816473005-A
Country	US
Kind code	B2
Filing date	Mar 19, 2018
Priority date	Mar 30, 2017
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

An automatic dishwashing composition is provided, comprising: a dispersant polymer blend, comprising an acrylic acid homopolymer; and a copolymer of acrylic acid and a sulfonated monomer; wherein the dispersant polymer blend has a blend ratio of the acrylic acid homopolymer to the copolymer of 3:1 to 1:3; a surfactant; a builder; and optionally, an additive.

First claim

We claim:

1. An automatic dishwashing composition, comprising:
0.5 to 15 wt % of a dispersant polymer blend, comprising:
an acrylic acid homopolymer; and
a copolymer of acrylic acid and a sulfonated monomer;
wherein the dispersant polymer blend has a blend ratio of the acrylic acid homopolymer to the copolymer of 3:1 to 1:3 based on weight;

0.5 to 15 wt % of a surfactant; wherein the surfactant is a glycidyl ether-capped ethoxylated alcohol of formula I:

 wherein R 1 is a linear, saturated C 8-24 alkyl group, R 2 is a branched saturated C 6-10 alkyl group, m has an average value of 10 to 50, and n has an average value of 1.1 to 2;
1 to 75 wt % of a builder; and
0 to 75 wt % of an additive;
wherein the automatic dishwashing composition contains less than 0.5 wt % phosphate; and wherein the automatic dishwashing composition contains less than 0.1 wt % amino carboxylate chelant.

2. The automatic dishwashing composition of claim 1 , wherein the builder is selected from the group consisting of a carbonate, a citrate, a silicate and mixtures thereof.

3. The automatic dishwashing composition of claim 1 , further comprising an additive selected from the group consisting of a bleaching agent, a bleach activator, a bleach catalyst, an enzyme, a phosphonate salt and an aminocarboxylate chelant.

4. The automatic dishwashing composition of claim 1 , wherein the automatic dishwashing composition is amino carboxylate chelant free.

5. A method of cleaning an article in an automatic dishwashing machine, the method comprising:
applying to the article the automatic dishwashing composition of claim 1 .

Assignees

• Dow Global Technologies Llc
• Rohm & Haas

Inventors

• Ferrieux Severine
• Wasserman Eric
• Creamer Marianne
• Daugs Edward D
• Klamo Sara B
• Mercando Paul

Classifications

• C11D3/10 Primary

  Carbonates {; Bicarbonates} · CPC title

• C11D3/3765 Primary

  in liquid compositions · CPC title

• C11D3/2086

  Hydroxy carboxylic acids-salts thereof · CPC title

• C11D3/2082

  Polycarboxylic acids-salts thereof · CPC title

• C11D3/3757

  (Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions · CPC title