Automatic dishwashing composition with dispersant polymer

Patent metadata

Field	Value
Publication number	US-11920110-B2
Application number	US-201917272508-A
Country	US
Kind code	B2
Filing date	Oct 8, 2019
Priority date	Oct 22, 2018
Publication date	Mar 5, 2024
Grant date	Mar 5, 2024

Abstract

An automatic dishwashing composition is provided including a builder; a phosphonate; a nonionic surfactant; and a dispersant polymer, comprising: structural units of formula I

wherein each R 1 is independently selected from a hydrogen and a —C(O)CH 3 group; and structural units of formula II

wherein each R 2 is independently selected from a hydrogen and a —CH 3 group; 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.

First claim

We claim:

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

wherein each R 1 is independently selected from a hydrogen and a —C(O)CH 3 group; and
(b) 82 to 98 wt % of structural units of formula II

wherein each R 2 is independently selected from a hydrogen and a —CH 3 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.

2. The automatic dishwashing composition of claim 1 , wherein the automatic dishwashing composition contains ≤0.01 wt % of dispersant polymer having a lactone end group; and wherein the dispersant polymer comprises ≤0.5 wt % of structural units of sulfonated monomer.

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

4. The automatic dishwashing composition of claim 3 , wherein each R 2 is a hydrogen in 75 to 100 mol % of the structural units of formula II in the dispersant polymer.

5. The automatic dishwashing composition of claim 4 , wherein the automatic dishwashing composition contains less than 0.1 wt % phosphate, measured as elemental phosphorus.

6. The automatic dishwashing composition of claim 5 , wherein the automatic dishwashing composition contains 0 wt % of builders selected from the group consisting of nitrilotriacetic acid; ethylenediaminetetraacetic acid; diethylenetriaminepentaacetic acid; glycine-N,N-diacetic acid; methyl glycine-N,N-diacetic acid; 2-hydroxyethyliminodiacetic acid; glutamic acid-N,N-diacetic acid; 3-hydroxy-2,2′-iminodissuccinate; S,S-ethylenediaminedisuccinate aspartic acid-diacetic acid; N,N′-ethylene diamine disuccinic acid; iminodisuccinic acid; aspartic acid; aspartic acid-N,N-diacetic acid; beta-alaninediacetic acid; polyaspartic acid; salts thereof and mixtures thereof.

7. The automatic dishwashing composition of claim 6 , further comprising an additive.

8. The automatic dishwashing composition of claim 7 , wherein the additive is selected from the group consisting of a bleaching agent, a bleach activator, an enzyme, a filler, and mixtures thereof.

9. The automatic dishwashing composition of claim 8 , further comprising an additive, wherein the additive comprises a mixture of a bleaching agent; a bleach activator and an enzyme.

10. A method of cleaning an article in an automatic dishwashing machine, comprising:
providing at least one article;
providing an automatic dishwashing composition according to claim 1 ; and,
applying the automatic dishwashing composition to the at least one article.

Assignees

• Dow Global Technologies Llc
• Rohm & Haas

Inventors

• Backer Scott
• Creamer Marianne
• Pulukkody Randara
• Ferrieux Severine

Classifications

• C11D3/3761 Primary

  in solid compositions · CPC title

• C11D1/66

  Non-ionic compounds {(C11D1/002, C11D1/004, C11D1/008 take precedence)} · CPC title

• C11D1/72

  Ethers of polyoxyalkylene glycols · CPC title

• C11D3/046

  Salts · CPC title

• C11D3/08

  Silicates · CPC title