Detergent composition comprising MGDA and a sulfonated copolymer

Patent metadata

Field	Value
Publication number	US-10047323-B2
Application number	US-201615008472-A
Country	US
Kind code	B2
Filing date	Jan 28, 2016
Priority date	Feb 2, 2015
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A phosphate-free automatic dishwashing detergent composition in unit-dose form having a weight of from about 8 to about 25 grams, the composition comprising:
i) greater than about 5 to about 8 grams of an organic complexing agent; ii) a dispersant polymer; iii) from about 1 to about 3 grams of bleach

and wherein the complexing agent and the dispersant polymer are in a weight ratio of from about 5:1 to about 25:1.

First claim

What is claimed is:

1. A phosphate-free automatic dishwashing detergent composition in unit-dose form having a weight of from about 8 to about 25 grams, the composition comprising:
i) from about 5.5 to about 7 grams of a salt of methyl glycine diacetic acid;
ii) from about 0.3 to about 0.5 grams a dispersant polymer;
iii) from about 1 to about 3 grams of sodium percarbonate;
and wherein the dispersant polymer is a sulfonated polymer comprising 2-acrylamido-2-methylpropane sulfonic acid monomers and carboxyl monomers, wherein the salt of methyl glycine diacetic acid and the sulfonated polymer are in a weight ratio of from about 10:1 to about 20:1, wherein the composition is free of manganese bleach catalyst.

2. A composition according to claim 1 wherein the composition is substantially free of citrate.

3. A composition according to claim 1 wherein the composition further comprises an enzyme selected from amylase, protease and a mixture thereof.

4. A composition according to claim 1 wherein the composition further comprises from 0.05 to 0.8 grams of a crystal growth inhibitor.

5. A composition according to claim 1 said composition has a pH equal or greater than 9 to 12 as measured in 1% weight/volume aqueous solution at 20° C.

6. A composition according to claim 1 having a reserve alkalinity equal or greater than about 10 to about 20 at a pH of 9.5 as measured in NaOH with 100 mL of product at 20° C.

7. A method of cleaning dishware in an automatic dishwasher comprising the step of subjecting the dishware to a wash liquor comprising a composition according to claim 1 .

8. A method of cleaning dishware in an automatic dishwasher comprising the step of subjecting the dishware to a wash liquor comprising a composition according to claim 1 wherein the cleaning takes place using hard water.

Assignees

• Procter & Gamble

Inventors

• Letzelter Nathalie Sophie
• Randhawa Ashmita
• Viallet Sandrine Annette Henriette

Classifications

• C11D3/3932

  Inorganic compounds or complexes · CPC title

• C11D3/33

  Amino carboxylic acids · CPC title

• C11D3/378

  (Co)polymerised monomers containing sulfur, e.g. sulfonate · CPC title

• C11D3/225 Primary

  etherified, e.g. CMC · CPC title

• C11D17/045

  Multi-compartment · CPC title