Detergent composition

Patent metadata

Field	Value
Publication number	US-2016177236-A1
Application number	US-201514961915-A
Country	US
Kind code	A1
Filing date	Dec 8, 2015
Priority date	Dec 17, 2014
Publication date	Jun 23, 2016
Grant date	—

Abstract

Low-pH automatic dishwashing detergent composition having a pH as measured in 1% weight aqueous solution at 25° C. of from about 5 to about 7.5 and comprising a protease selected from the group consisting of: (i) a metalloprotease; (ii) a cysteine protease, (iii) an aspartate protease, and mixtures thereof.

First claim

What is claimed is:

1 . A low-pH automatic dishwashing detergent composition having a pH as measured in 1% weight aqueous solution at 25° C. of from about 5 to about 7.5 and comprising a protease selected from the group consisting of:
(i) a metalloprotease;
(ii) a cysteine protease;
(iii) an aspartate protease, and
(iv) mixtures thereof.

2 . A composition according to claim 1 wherein the protease comprises a metalloprotease.

3 . A composition according to claim 1 wherein the protease is a metalloprotease that belongs to the EC class EC3.4.24.27.

4 . A composition according to claim 1 wherein the protease has an isoelectric point from about 4 to about 9.

5 . A composition according to claim 1 wherein the composition further comprises at least one enzyme selected from the group consisting of an α-amylase, a β-amylase, a pullulanase, a lipase, a cellulase, an oxidase, a phospholipase, a perhydrolase, a xylanase, a pectate lyase, a pectinase, a galacturanase, a hemicellulase, a xyloglucanase, a mannanase and mixtures thereof.

6 . A composition according to claim 1 having a pH of from about 5 to less than about 6.9 as measured in 1% weight aqueous solution at 25° C.

7 . A composition according to claim 1 wherein the composition further comprises a buffer.

8 . A composition according to claim 1 wherein the composition is substantially builder free.

9 . A composition according to claim 1 wherein the composition further comprises an anionic surfactant.

10 . A composition according to claim 1 wherein the composition further comprises a suds suppressor.

11 . A composition according to claim 1 wherein the composition further comprises an iron chelant, wherein the iron chelant is selected from the group consisting of siderophores, catechols, enterobactin, hydroxamates, hydroxypyridinones (or hydroxypyridine N-Oxides) and mixtures thereof.

12 . A composition according to claim 1 wherein the composition further comprises an iron chelant comprising a catechol sulfonate.

13 . A composition according to claim 1 wherein the composition further comprises an iron chelant comprising a hydroxypyridine N-Oxide, preferably 2-pyridinol 1 oxide.

14 . A composition according to claim 1 wherein the composition comprises from about 0.1% to about 5% by weight of the composition of an iron chelant.

15 . A composition according to claim 1 wherein the composition comprises from about 0.5% to about 5% by weight of the composition of bleach.

16 . A composition according to claim 1 wherein the composition further comprises a crystal growth inhibitor.

17 . A composition according to claim 1 wherein the composition further comprises a performance polymer.

18 . A composition according to claim 1 wherein the composition further comprises a metalloprotease, an α-amylase, an iron chelant, and wherein the composition is free or essentially free of bleach.

19 . A single or multi-compartment water-soluble cleaning pack comprising a cleaning composition according to claim 1 and a water-soluble enveloping material wherein the weight of the pack is from 5 to 40 g.

20 . A method of cleaning dishware/tableware in a dishwasher comprising the step of subjecting the ware to a wash liquor comprising a composition according to claim 1 .

Assignees

• Procter & Gamble

Inventors

• Brooker Alan Thomas
• Souter Philip Frank
• Ure Colin
• Wilkinson Craig Adam
• Bewick Lindsay Suzanne

Classifications

• C11D3/386 Primary

  Preparations containing enzymes {, e.g. protease or amylase} · CPC title

• C11D3/38618

  Protease or amylase in liquid compositions only · CPC title

• C11D3/3757

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

• C11D17/045

  Multi-compartment · CPC title

• C11D3/38609

  Protease or amylase in solid compositions only · CPC title