Formulations, preparation thereof, and use thereof as, or for preparing, dishwashing compositions

Patent metadata

Field	Value
Publication number	US-9994797-B2
Application number	US-201414771100-A
Country	US
Kind code	B2
Filing date	Mar 28, 2014
Priority date	Apr 2, 2013
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

Formulations, comprising
(A) in total in the range of 1 to 50% by weight of at least one compound, selected from methylglycinediacetic acid (MGDA), glutamic acid diacetate (GLDA) and salts thereof, (B) in total in the range of 0.01 to 0.4% by weight of at least one zinc salt, stated as zinc, (C) in total in the range of 0.001 to 0.045% by weight of homo- or copolymer of ethyleneimine, and (D) optionally 0.5 to 15% by weight of bleach,

based in each case on the solids content of the respective formulation.

First claim

The invention claimed is:

1. A formulation, comprising
(A) in total in a range of 1 to 50% by weight of at least one compound selected from the group consisting of methylglycinediacetic acid (MGDA), glutamic acid diacetate (GLDA) and a salt thereof,
(B) in total in a range of 0.01 to 0.4% by weight of at least one zinc salt, in terms of zinc,
(C) in total in a range of 0.001 to 0.045% by weight of a homo- or copolymer of ethyleneimine, and
(D) optionally 0.5 to 15% by weight of bleach,
based in each case on the solids content of the formulation.

2. The formulation of claim 1 , wherein the formulation is phosphate- and polyphosphate-free.

3. The formulation of claim 1 , wherein (C) is selected from the group consisting of a linear or branched homopolymer of ethyleneimine, and a graft copolymer of ethyleneimine.

4. The formulation of claim 1 , wherein the zinc salt is selected from the group consisting of ZnCl 2 , ZnSO 4 , zinc acetate, zinc citrate, Zn(NO 3 ) 2 , Zn(CH 3 SO 3 ) 2 and zinc gallate.

5. The formulation of claim 1 , wherein the formulation is solid at room temperature.

6. The formulation of claim 1 , further comprising water in a range of 0.1 to 10% by weight.

7. The formulation of claim 1 , comprising 0.5 to 15% by weight of bleach (D), selected from the group consisting of an oxygen bleach and a chlorine-containing bleach.

8. A process for machine cleaning crockery and/or kitchen utensils, comprising contacting the formulation of claim 1 with the crockery and/or the kitchen utensils.

9. A process for machine cleaning an item having at least one glass surface which may be decorated or undecorated, comprising contacting the formulation of claim 1 with the item.

10. The process of claim 8 , wherein the machine cleaning is a washing or cleaning operation of a dishwasher.

11. The process of claim 9 , wherein the item is at least one member selected from the group consisting of a drinking glass, a glass vase, and a glass cooking vessel.

12. A process for preparing the formulation of claim 1 , comprising mixing
(A) at least one compound selected from methylglycinediacetic acid (MGDA), glutamic acid diacetate (GLDA) and alkali metal salts thereof,
(B) at least one zinc salt,
(C) at least one homo- or copolymer of ethyleneimine,
(D) and optionally at least one bleach selected from the group consisting of an oxygen bleach and a chlorine-containing bleach,
and optionally a further ingredient with one another in one or more steps in the presence of water and subsequently removing the water.

13. The process of claim 12 , wherein the water is removed by spray-drying, spray granulation or compaction.

14. The formulation of claim 1 , wherein said formulation is free from heavy metal compounds which do not act as bleach catalyst.

15. The formulation of claim 1 , wherein said formulation comprises 0 to 30 ppm of heavy metal compounds which do not act as bleach catalyst.

Assignees

• Basf Se

Inventors

• Hueffer Stephan
• Garcia Marcos Alejandra
• Hartmann Markus
• Weber Heike

Classifications

• C11D3/33 Primary

  Amino carboxylic acids · CPC title

• C11D3/3723

  Polyamines or polyalkyleneimines · CPC title

• C11D3/395

  Bleaching agents · CPC title

• C11D3/2082

  Polycarboxylic acids-salts thereof · CPC title

• C11D3/1213

  Oxides or hydroxides, e.g. Al2O3, TiO2, CaO or Ca(OH)2 · CPC title