High alkaline warewash detergent with enhanced scale control and soil dispersion

Patent metadata

Field	Value
Publication number	US-11920109-B2
Application number	US-202217664316-A
Country	US
Kind code	B2
Filing date	May 20, 2022
Priority date	Nov 11, 2013
Publication date	Mar 5, 2024
Grant date	Mar 5, 2024

Abstract

Detergent compositions and methods of preparing and using the detergent compositions are disclosed. The detergent compositions comprise a polymer system comprising at least one polycarboxylic acid polymer, copolymer, or terpolymer, an alkalinity source comprising an alkali metal carbonate, a nonionic surfactant and water. The detergent compositions are suitable at alkaline pH and reduce or prevent scale formation, improve soil dispersion, and provide effective detergency.

First claim

The invention claimed is:

1. A concentrated detergent comprising:
a polymer system comprising at least one polymaleic acid homopolymer, at least one acrylic copolymer, and at least one maleic anhydride/olefin copolymer; wherein said polymaleic acid homopolymer is present between about 25 wt. % and about 55 wt. % of the polymer system, and said maleic anhydride/olefin copolymer is present between about 5 wt. % and about 35 wt. % of the polymer system;
an alkalinity source comprising an alkali metal carbonate and/or alkali metal hydroxide;
an enzyme;
a nonionic surfactant; and
water;
wherein said detergent has an alkaline pH; and
wherein said polymaleic acid homopolymer, acrylic acid copolymer, and maleic anhydride/olefin copolymer are present in a ratio between about 1:1:1 to about 3:3:1.

2. The detergent of claim 1 , wherein said polymer system comprises at least two polycarboxylic acid polymers, copolymers, or terpolymers.

3. The detergent of claim 1 , wherein said polymaleic acid homopolymer, acrylic acid copolymer, and maleic anhydride/olefin copolymer are present in a ratio between about 1:1:1 to about 2:2:1.

4. The detergent of claim 1 , wherein said acrylic acid copolymer is present between about 25 wt. % and about 55 wt. % of the polymer system.

5. The detergent of claim 1 , wherein said detergent composition comprises between about 0.01 wt. % and about 20 wt. % polymer system, between about 50 wt. % and about 99 wt. % alkalinity source, between about 0.01 wt. % and about 15 wt. % nonionic surfactant, and between about 0.01 wt. % and about 20 wt. % water.

6. The detergent of claim 1 , wherein said detergent is substantially free of phosphorus.

7. The detergent of claim 1 , wherein the polymers, copolymers, and/or terpolymers of the polymer system have molecular weights between about 100 and about 10,000.

8. The detergent of claim 1 , wherein said detergent contains at least one additional functional ingredient selected from the group consisting of defoaming agents, anti-redeposition agents, bleaching agents, enzymes, surfactants, solubility modifiers, dispersants, rinse aids, metal protecting agents, stabilizing agents, corrosion inhibitors, additional sequestrants and/or chelating agents, fragrances and/or dyes, rheology modifiers or thickeners, hydrotropes or couplers, buffers, solvents, and combinations thereof.

9. A method of using a concentrated detergent of claim 1 comprising:
forming a use solution with said concentrated detergent;
contacting a surface with said use solution;
cleaning said surface with said use solution.

10. The method of claim 9 , wherein said warewash detergent is substantially free of phosphorus.

11. The method of claim 9 , wherein said warewash detergent is present in the use solution between about 200 ppm and about 10,000 ppm.

12. The method of claim 9 , wherein said warewash detergent is present in the use solution between about 500 ppm and about 4000 ppm.

13. The method of claim 9 , wherein said polymer system is present in the use solution between about 1 and about 500 ppm.

14. The method of claim 9 , wherein said surface is a ware.

15. The method of claim 9 , wherein said method provides substantially similar cleaning performance to a method employing a phosphorus-containing detergent.

16. The detergent of claim 1 , wherein said polymaleic acid homopolymer is present in an amount of between about 0 wt. % and about 5 wt. % of the concentrated detergent, said polyacrylic acid copolymer is present in an amount of between about 0 wt. % and about 5 wt. % of the concentrated detergent, and said maleic anhydride/olefin copolymer is present in an amount of between about 0.05 wt. % and about 3 wt. % of the concentrated detergent.

Assignees

• Ecolab Usa Inc

Inventors

• Dotzauer David
• Meier Timothy
• Silvernail Carter M
• Mansergh John

Classifications

• C11D3/3757 Primary

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

• C11D1/66 Primary

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

• C11D3/10

  Carbonates {; Bicarbonates} · CPC title

• C11D3/3765

  in liquid compositions · CPC title

• C11D11/0023

  Chemistry & Metallurgy · mapped topic