Stable liquid manual dishwashing compositions containing enzymes

• US 9,745,543 B2
• Filed: 09/10/2012
• Issued: 08/29/2017
• Est. Priority Date: 09/10/2012
• Status: Active Grant

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Inventors: Hunt, Jr., Clinton, Man, Victor Fuk-Pong, Lentsch, Steven Eugene, Tan, Lylien, Killeen, Yvonne Marie, Everson, Terrence P.
• Primary Examiner(s): HOBBS, LISA JOE
• Application Number:
  US13/608,324
• Publication Number:
  US 20140073036A1
• Time in Patent Office: 1,814 Days
• CPC Class Codes: C11D 1/88 Ampholytes; Electroneutral compounds C11D1/002, C11D1/004, C11D1/008 take precedence
• CPC Class Codes: C11D 3/38618 Protease or amylase in liquid compositions only
• CPC Class Codes: C11D 3/38663 Stabilised liquid enzyme compositions

Abstract

Liquid stable enzyme compositions and methods of employing the same for cleaning, including warewashing and dishwashing, are disclosed. The stable enzyme compositions preferably employ an amphoteric surfactant stabilizing agent, such as disodium camphodiacetate (CADA), to stabilize a mixture of traditionally unstable enzymes, such as proteases and lipases.

Claims

1. A stabilized liquid enzyme composition comprising:

from about 1 wt-% to about 50 wt-% of an enzyme stabilizing agent, wherein said agent is disodium camphodiacetate; and

from about 0.01 wt-% to about 25 wt-% a combination of more than one enzymes comprising at least one protease, wherein the composition retains at least about 80% of its initial enzyme activity after 40 days at ambient temperature; and

wherein the composition is substantially free of organic monocarboxylic acids, boric acid, and borate salts.

2. The composition of claim 1, wherein the enzyme stabilizing agent is in an amount of from about 3.8 wt-% to about 7.6 wt-%.

3. The composition of claim 1, wherein the combination of more than one enzyme is in an amount of from about 0.05 wt-% to about 5 wt-%.

4. The composition of claim 1, wherein the enzymes are the protease, a lipase and an amylase.

5. The composition of claim 1, wherein the enzymes are the protease and a lipase.

6. The composition of claim 1, wherein the ratio of the enzyme stabilizing agent to the enzymes is from about 64:

1 to about 1;

1.

7. The composition of claim 1, further comprising a surfactant, wherein said surfactant is an anionic, nonionic, amphoteric and/or zwitterionic surfactant.

8. A stabilized liquid enzyme composition comprising:

from about 1 wt-% to about 50 wt-% of disodium camphodiacetate;

from about 0.01 wt-% to about 25 wt-% of a combination of more than one enzyme comprising at least one protease; and

a solvent;

wherein the composition retains at least about 80% of its initial enzyme activity after 40 days at ambient temperature, wherein the composition is substantially free of organic monocarboxylic acids, boric acid, and borate salts, and wherein the ratio of the enzyme stabilizing agent to the enzymes is from about 64;

1 to about 1;

1.

9. The composition of claim 8, wherein the enzyme stabilizing agent is from about 3.8 wt-% to about 7.6 wt-% of the composition, and wherein the enzymes are from about 0.05 wt-% to about 5 wt-% of the composition.

10. The composition of claim 8, wherein the ratio of the enzyme stabilizing agent to the enzymes is from about 10:

1 to about 2.5;

1.

11. The composition of claim 8, wherein the enzymes are the protease and a lipase.

12. The composition of claim 8, wherein the enzyme stabilizing agent is from about 5 wt-% to about 50 wt-% of the composition, wherein the enzymes are from about 0.1 wt-% to about 20 wt-% of the composition, and wherein the solvent is from about 0.1 wt-% to about 20 wt-% of the composition.

13. The composition of claim 8, further comprising from about 1 wt-% to about 30 wt-% of a surfactant, wherein said surfactant is an anionic, nonionic, amphoteric and/or zwitterionic surfactant.

14. The composition of claim 8, wherein the compositional stability is measured by the enzymes in the composition retaining at least about 90% of its initial enzyme activity after 40 days at ambient temperature.

15. A method of cleaning comprising:

applying a liquid stable enzyme composition to an article to be cleaned, wherein the liquid stable enzyme composition comprises from about 1 wt-% to about 50 wt-% of an enzyme stabilizing agent that is disodium camphodiacetate, from about 0.01 wt-% to about 25 wt-% of a combination of enzymes including a protease enzyme, and a solvent, wherein the composition retains at least about 80% of its initial enzyme activity after 40 days at ambient temperature, wherein the ratio the enzyme stabilizing agent to the enzymes is from about 64;

1 to about 1;

1, and wherein the composition is substantially free of organic monocarboxylic acids, boric acid, and borate salts.

16. The method of claim 15, further comprising a first step of providing a liquid stable enzyme composition, wherein the enzyme stabilizing agent prevents the protease enzyme from deactivating the additional enzyme(s).

17. The method of claim 15, wherein the article is cleaned at ambient temperatures.

18. The method of claim 15, wherein the enzyme stabilizing agent is in an amount from about 3.8 wt-% to about 7.6 wt-% of the composition, wherein the enzymes are proteases and lipases in an amount form about 0.05 wt-% to about 5 wt-% of the composition, and wherein the ratio the enzyme stabilizing agent to the enzymes is from about 10:

1 to about 2.5;

1.

19. The method of claim 15, wherein the compositional stability is measured by the enzymes in the composition retaining at least about 90% of its initial enzyme activity after 40 days at ambient temperatures.