Multiuse, enzymatic detergent and methods of stabilizing a use solution

Patent metadata

Field	Value
Publication number	US-10995303-B2
Application number	US-201816001085-A
Country	US
Kind code	B2
Filing date	Jun 6, 2018
Priority date	Nov 11, 2013
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

Stabilized use solutions of low phosphorus, alkali metal carbonate detergents employing enzymes for cleaning compositions are disclosed. In particular, the present invention is a composition for, and method of, removing soils, preventing redeposition of protein soils and reducing foam, using stabilized enzyme cleaning compositions, namely use solutions of the same.

First claim

What is claimed is:

1. A solid multi-use detergent composition comprising:
an alkali metal carbonate alkalinity source;
a protease enzyme;
a soluble starch or polysaccharide stabilizing agent;
a surfactant, wherein the surfactant is nonionic, amphoteric, zwitterionic, or a mixture thereof, and wherein the surfactant is a defoaming or wetting agent; and
water;
wherein said detergent has an alkaline pH of at least about 9; and
wherein a detergent use solution of the composition maintains cleaning performance and results in at least about 40% protease enzymatic activity at temperatures of at least about 65° C. in use solution for at least about 20 minutes.

2. The composition of claim 1 , wherein said stabilizing agent is selected from the group consisting of amylose, amylopectin, pectin, inulin, modified inulin, potato starch, modified potato starch, corn starch, modified corn starch, wheat starch, modified wheat starch, rice starch, modified rice starch, cellulose, modified cellulose, dextrin, dextran, maltodextrin, cyclodextrin, glycogen, oligofructose, or modified derivatives thereof.

3. The composition of claim 1 , wherein said detergent composition comprises between about 50 wt-% and about 85 wt-% alkali metal carbonate actives, between about 5 wt-% and about 30 wt-% water, between about 0.01 wt-% and about 5 wt-% protease enzyme, and between about 0.01 wt-% and about 30 wt-% stabilizing agent actives.

4. The composition of claim 1 , further comprising at least one component selected from the group consisting of a chelating agent and an additional stabilizing agent.

5. The composition of claim 1 , wherein said detergent is substantially free of phosphorus and/or nitrilotriacetic acid (NTA).

6. A stabilized multi-use detergent use solution composition produced by the process comprising:
providing a detergent composition comprising: an alkali metal carbonate alkalinity source;
a protease enzyme; a polysaccharide stabilizing agent; a surfactant, wherein the surfactant is nonionic, amphoteric, zwitterionic, or a mixture thereof, and wherein the surfactant is a defoaming or wetting agent; and water, wherein said detergent composition is provided in one or more solid and/or liquid compositions; and
contacting the detergent composition with a diluent to generate an aqueous use solution; wherein said use solution has an alkaline pH of at least about 9; and
wherein said protease retains at least about 40% enzymatic activity in said use solution for at least 20 minutes at temperatures between about 65-80° C.

7. The composition of claim 6 , wherein said stabilizing agent is an amylose and/or amylopectin-containing starch.

8. The composition of claim 6 , wherein said use solution comprises between about 50 wt-% and about 85 wt-% alkali metal carbonate actives, between about 5 wt-% and about 30 wt-% water, between about 0.01 wt-% and about 5 wt-% protease enzyme, and between about 0.0001 wt-% and about 30 wt-% stabilizing agent actives.

9. The composition of claim 6 , wherein said use solution has at least about 60% protease enzymatic activity retained for said period of time, and wherein said use solution comprises between about 10 ppm to 2000 ppm actives stabilizing agent and between about 0.1 ppm to 100 ppm protease enzyme.

10. The composition of claim 6 , wherein said detergent use solution further contains at least one functional ingredient selected from the group consisting of a defoaming agent, an anti-redeposition agent, a bleaching agent, a solubility modifier, a dispersant, a rinse aid, a polymer, a metal protecting agent, an additional stabilizing agent, a corrosion inhibitor, a sequestrant and/or a chelating agent, a fragrance and/or a dye, a rheology modifier or thickener, a hydrotrope or coupler, a buffer, a solvent, and combinations thereof.

11. A method of cleaning using a stabilized multi-use detergent composition comprising:
generating a use solution with a detergent composition comprising an alkali metal carbonate alkalinity source, a protease enzyme, a soluble starch or polysaccharide stabilizing agent, a surfactant, wherein the surfactant is nonionic, amphoteric, zwitterionic, or a mixture thereof, and wherein the surfactant is a defoaming or wetting agent, and water, wherein said detergent composition is provided in one or more solid and/or liquid compositions;
contacting a surface with said use solution; and
cleaning said surface with said use solution, wherein said use solution has an alkaline pH of at least about 9, and wherein said protease retains at least about 40% enzymatic activity in said use solution for at least 20 minutes at temperatures between about 65-80° C.

12. The method of claim 11 , wherein at least about 60% enzymatic activity is retained for said period of time.

13. The method of claim 11 , wherein at least about 50% enzymatic activity is retained for at least about 60 minutes at the pH of at least about 9 and temperatures between about 65-80° C.

14. The method of claim 11 , wherein said enzyme is present in the use solution between about 0.1 ppm and about 100 ppm and wherein said stabilizing agent is present in the use solution between about 0.1 ppm and about 10,000 ppm actives.

15. The method of claim 14 , wherein said stabilizing agent is present in the use solution between about 10 ppm and about 1,000 ppm actives.

16. The method of claim 11 , wherein said surface is a ware.

17. The method of claim 11 , wherein said detergent is a multi-use solid detergent composition.

18. The method of claim 11 , wherein said use solution is introduced to a washing step of a wash cycle and enhances soil removal and/or prevents redeposition of soils and maintains low-foaming of a wash water source.

Assignees

• Ecolab Usa Inc

Inventors

• Chan Wendy
• Stokes Jennifer
• Jensen Lyndal
• Silvernail Carter M
• Everson Terrence P
• Legatt Graig
• Ortmann Nathan Richard
• Hammel Devon Beau

Classifications

• C11D3/32

  Amides; Substituted amides · CPC title

• C11D7/12

  Carbonates {bicarbonates} · CPC title

• C11D3/3719

  Polyamides or polyimides · CPC title

• C11D3/38609 Primary

  Protease or amylase in solid compositions only · CPC title

• C11D7/32

  containing nitrogen · CPC title