Dishwasher agent with additional uses

• US 20040106534A1
• Filed: 09/15/2003
• Published: 06/03/2004
• Est. Priority Date: 07/07/2000
• Status: Abandoned Application

• Current Assignee: Henkel KGaA (Henkel AG & Co KGaA)
• Original Assignee: Henkel KGaA (Henkel AG & Co KGaA)
• Inventors: Jekel, Maren, Sorg, Rainer, Greger, Manfred, Schlienz, Markus, Holderbaum, Thomas, Schmiedel, Peter, Kessler, Arnd, Sunder, Matthias, Nitsch, Christian, Richter, Bernd, Volk, Harald, Pegelow, Ulrich, Bayersdoerfer, Rolf
• Application Number:
  US10/332,332
• Publication Number:
  US 20040106534A1
• Time in Patent Office: Days
• US Class Current: 510/220
• CPC Class Codes: C11D 17/0078 Multilayered tablets
• CPC Class Codes: C11D 17/0091 Dishwashing tablets
• CPC Class Codes: C11D 3/2082 Polycarboxylic acids-salts thereof
• CPC Class Codes: C11D 3/2086 Hydroxy carboxylic acids-salts thereof
• CPC Class Codes: C11D 3/222 Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
• CPC Class Codes: C11D 3/37 Polymers polymeric surface-active agents C11D1/008; polysaccharides C11D3/222
• CPC Class Codes: C11D 3/3723 Polyamines or polyalkyleneimines
• CPC Class Codes: C11D 3/3907 Organic compounds

Abstract

The invention relates to a cleaning agent for dishwashers comprising a first part (basic composition), which mainly acts during the main cleaning cycle of the dishwasher, and a second part, which mainly acts during the rinsing cycle of the dishwasher as a result a suitable coating. The second part contains one or several substances form the following group: detergency builders, acidifying agents, chelate complex builders or coating inhibiting polymers.

Claims

1. A detergent for machine dishwashing, comprising

a) a first part (base composition), which exerts its effect substantially in the main wash cycle of the dishwasher;

and

b) a second part, which by dint of appropriate coating develops its effect substantially in the rinse cycle of the dishwasher,

characterized in that the second part comprises one or more substances selected from the group consisting of builders, acidifiers, chelating agents, and scale inhibiting polymers.

2. The detergent of claim 1, characterized in that the second part contains one or more builders from the group consisting of sodium carbonate, sodium hydrogen carbonate, and trisodium citrate in amounts above 10% by weight, preferably above 15% by weight, with particular preference above 20% by weight, and in particular above 25% by weight, based in each case on the weight of the second part.

3. The detergent of one of claims 1 or 2, characterized in that the second part contains one or more acidifiers from the group consisting of citric acid, adipic acid, malic acid, fumaric acid, maleic acid, malonic acid, oxalic acid, succinic acid, and tartaric acid in amounts above 5% by weight, preferably above 10% by weight, with particular preference above 20% by weight, and in particular above 25% by weight, based in each case on the weight of the second part.

4. The detergent of one of claims 1 to 3, characterized in that the second part contains one or more chelating agents from the groups consisting of

(i) polycarboxylic acids wherein the sum of the carboxyl and any hydroxyl groups is at least 5,

(ii) nitrogen-containing monocarboxylic or poly-carboxylic acids,

(iii) geminal diphosphonic acids,

(iv) aminophosphonic acids,

(v) phosphonopolycarboxylic acids, and

(vi) cyclodextrins

in amounts above 0.1% by weight, preferably above 0.5% by weight, with particular preference above 1% by weight, and in particular above 2.5% by weight, based in each case on the weight of the second part.

5. The detergent of one of claims 1 to 4, characterized in that the second part contains one or more scale inhibiting polymers from the group consisting of cationic homopolymers or copolymers, especially hydroxypropyltrimethylammonium-guar;

copolymers of aminoethyl methacrylate and acrylamide, copolymers of dimethyldiallylammonium chloride and acrylamide, polymers containing imino groups, polymers containing quaternized ammonium-alkyl methacrylate groups as monomer units, cationic polymers of monomers such as trialkylammonium-alkyl (meth)acrylate or -acrylamide;

dialkyldiallyldiammonium salts;

polymer-analogous reaction products of ethers or esters of polysaccharides with ammonium side groups, especially guar derivatives, cellulose derivatives, and starch derivatives;

polyadducts of ethylene oxide with ammonium groups;

quaternary ethyleneimine polymers and polyesters and polyamides having quaternary side groups in amounts above 5% by weight, preferably above 10% by weight, with particular preference above 20% by weight, and in particular above 25% by weight, based in each case on the weight of the second part.

6. The detergent of one of claims 1 to 5, characterized in that the second part contains one or more copolymers of

i) unsaturated carboxylic acids

ii) monomers containing sulfonic acid groups

iii) if desired, further ionic or nonionogenic monomers

in amounts above 5% by weight, preferably above 10% by weight, with particular preference above 20% by weight, and in particular above 25% by weight, based in each case on the weight of the second part.

7. The detergent of one of claims 1 to 6, characterized in that the second part further contains from 1 to 50% by weight, preferably from 2.5 to 45% by weight, and in particular from 5 to 40% by weight of nonionic surfactant(s).

8. The detergent of one of claims 1 to 7, characterized in that the coating of the second part comprises an LCST polymer.

9. The detergent of claim 8, characterized in that the LCST polymer is selected from cellulose derivatives, mono- or di-N-alkylated acrylamides, copolymers of mono- or di-N-substituted acrylamides with acrylamides and/or acrylates or acrylic acids.

10. The detergent of one of claims 8 or 9, characterized in that the LCST polymer is selected from cellulose ethers, polyisopropylacrylamide, copolymers of polyisopropylacrylamide, and blends of these substances.

11. The detergent of one of claims 8 to 10, characterized in that the lower critical separation temperature of the LCST polymer lies between 20°

C. and 90°

C.

12. The detergent of one of claims 1 to 11, characterized in that the coating of the second part is composed of two or more coating layers, preferably of two or three coating layers.

13. The detergent of one of claims 1 to 12, characterized in that the second part has been produced by a pressing operation, especially tableting.

14. The detergent of one of claims 1 to 13, characterized in that the second part has a diameter of between 1 and 30 mm, preferably between 2.5 and 15 mm, and in particular between 5 and 10 mm.

15. The detergent of one of claims 1 to 14, characterized in that the first part contains builders in amounts of from 1 to 100% by weight, preferably from 5 to 95% by weight, with particular preference from 10 to 90% by weight, and in particular from 20 to 85% by weight, based in each case on the weight of the first part.

16. The detergent of one of claims 1 to 15, characterized in that the first part contains phosphate(s), preferably alkali metal phosphate(s), with particular preference pentasodium and/or pentapotassium triphosphate (sodium or potassium tripolyphosphate), in amounts of from 20 to 80% by weight, preferably from 25 to 75% by weight, and in particular from 30 to 70% by weight, based in each case on the weight of the first part.

17. The detergent of one of claims 1 to 16, characterized in that the first part contains citrate(s), preferably sodium citrate, with particular preference trisodium citrate dihydrate, in amounts of from 10 to 60% by weight, preferably from 15 to 50% by weight, and in particular from 20 to 40% by weight, based in each case on the weight of the first part.

18. The detergent of one of claims 1 to 17, characterized in that the first part contains bleaches from the group of the oxygen or halogen bleaches, in particular the chlorine bleaches, with particular preference sodium perborate and sodium percarbonate, in amounts of from 2 to 25% by weight, preferably from 5 to 20% by weight, and in particular from 10 to 15% by weight, based in each case on the weight of the first part.

19. The detergent of one of claims 1 to 18, characterized in that the first part contains bleach activators from the groups of polyacylated alkylenediamines, especially tetraacetylethylene-diamine (TAED), N-acyl imides, especially N-nonanoylsuccinimide (NOSI), acylated phenolsulfonates, especially n-nonanoyl- or isononanoyloxybenzenesulfonate (n- or iso-NOBS), and n-methylmorpholiniumacetonitrile methyl sulfate (MMA), in amounts of from 0.25 to 15% by weight, preferably from 0.5 to 10% by weight, and in particular from 1 to 5% by weight, based in each case on the weight of the first part.

20. The detergent of one of claims 1 to 19, characterized in that the first part contains silver protectants from the group consisting of triazoles, benzotriazoles, bisbenzotriazoles, aminotriazoles, alkylaminotriazoles, and transition metal salts or transition metal complexes, with particular preference benzotriazole and/or alkylaminotriazole, in amounts of from 0.01 to 5% by weight, preferably from 0.05 to 4% by weight, and in particular from 0.5 to 3% by weight, based in each case on the weight of the first part.

21. The detergent of one of claims 1 to 20, characterized in that the first part further contains one or more substances from the groups of enzymes, corrosion inhibitors, scale inhibitors, cobuilders, dyes and/or fragrances in total amounts of from 6 to 30% by weight, preferably from 7.5 to 25% by weight, and in particular from 10 to 20% by weight, based in each case on the weight of the first part.

22. The detergent of one of claims 1 to 21, characterized in that the first part is a liquid, gellike or pastelike composition for machine dishwashing.

23. The detergent of one of claims 1 to 21, characterized in that the first part is a particulate composition for machine dishwashing.

24. The detergent of one of claims 1 to 21, characterized in that the first part is a tablet-form composition for machine dishwashing.

25. The detergent of claim 24, characterized in that the first part is a multiphase tablet, in particular a two-, three- or four-phase tablet, it being preferred for the phases to have the form of layers.

26. The detergent of one of claims 24 or 25, characterized in that the coated second part has the form of a further layer, of a core, or of a body bonded adhesively on or in the first part (“

basic tablet”

).

27. The detergent of one of claims 24 to 26, characterized in that the first part has (a) cavity(ies) containing the second and any further parts.

28. The detergent of claim 27, characterized in that first part has at least two cavities one of which contains the second part while the other contains a further, functionalized part.

29. The detergent of one of claims 1 to 28, characterized in that the nonionic surfactant content of the first part is from 5 to 25% by weight, based in each case on the first part.

30. The detergent of one of claims 24 to 28, characterized in that the first part or at least one phase of a multiphase first part has a nonionic surfactant content of between 5 and 25% by weight, based in each case on the first part or on the phase of the first part.

31. A process for producing detergents for machine dishwashing, characterized by the steps of

A) producing a body which comprises one or more substances from the group consisting of builders, acidifiers, chelating agents or scale inhibiting polymers,

B) coating the body produced in step A),

C) unifying the coated body with a composition which develops its effect substantially in the main cleaning cycle of the dishwasher.

32. The process of claim 31, characterized in that the producing in step A) takes place by tableting.

33. The process of one of claims 31 or 32, characterized in that the coating in step B) comprises the application of one or more, preferably two or three, coating layers.

34. The process of one of claims 31 to 33, characterized in that the body produced in step A) is coated in step B) with an LCST polymer.

35. The process of one of claims 31 to 34, characterized in that the composition in step C) is a liquid, gellike or pastelike composition.

36. The process of one of claims 31 to 34, characterized in that the composition in step C) is a particulate composition.

37. The process of one of claims 31 to 34, characterized in that the composition in step C) is a tablet-form composition.

38. The process of claim 37, characterized in that the composition in step C) is a multiphase detergent tablet which has a cavity into which the coated body from step B) is adhesively bonded or pressed.