Storage-stable enzyme granules

Patent metadata

Field	Value
Publication number	US-10711262-B2
Application number	US-201214232076-A
Country	US
Kind code	B2
Filing date	Jul 5, 2012
Priority date	Jul 12, 2011
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

The storage stability of enzyme granules for detergents can be improved by incorporating a polyamine having a molecule with at least 10% w/w of nitrogen wherein at least 50% of the N atoms are present as amines.

First claim

The invention claimed is:

1. A granule having a core, which core comprises a homogeneous mixture comprising an enzyme in soluble form and a polyamine having a molecule with at least 10% w/w of nitrogen wherein at least 50% of the N atoms are present as amines, wherein the enzyme is free of covalent links to the polyamine.

2. The granule of claim 1 wherein the polyamine is polyethyleneimine.

3. The granule of claim 1 wherein the polyamine has an average molecular weight above 800 Da and below 2,000,000 Da.

4. The granule of claim 1 wherein the polyamine is present in an amount of 0.1-10% by weight of the mixture in the core.

5. The granule of claim 1 wherein the mixture in the core further comprises a soluble salt of a polyvalent cation.

6. The granule of claim 5 wherein the cation is Zn, Mg, Cu or Mn.

7. The granule of claim 5 wherein the soluble salt is a sulfate or acetate.

8. The granule of claim 5 wherein the soluble salt is present in an amount of 0.1-20% by weight in anhydrous form.

9. The granule of claim 1 wherein the core comprises zinc acetate in an amount of 1-5% by weight of the core.

10. The granule of claim 1 wherein the enzyme is a lipase, a cutinase, an amylase, a carbohydrase, a cellulase, a pectinase, a pectate lyase, a mannanase, an arabinase, a galactanase, a xylanase, an oxidase, a laccase, or a peroxidase.

11. The granule of claim 1 wherein the core has a coating comprising a salt.

12. A method of preparing a granule of claim 1 , which comprises granulating with an aqueous solution comprising the enzyme and the polyamine.

13. A granular detergent composition comprising a surfactant and an enzyme granule of claim 1 .

14. The granule of claim 4 , wherein the polyamine is present in an amount of 0.2-5 by weight of the mixture in the core.

15. The granule of claim 4 , wherein the polyamine is present in an amount of 0.5-2% by weight of the mixture in the core.

16. The granule of claim 5 , wherein the mixture in the core further comprises a soluble salt of a divalent cation.

17. The granule of claim 8 , wherein the soluble salt is present in an amount of 0.5-10% by weight in anhydrous form.

18. The granule of claim 8 , wherein the soluble salt is present in an amount of 1-5 by weight in anhydrous form.

19. The granule of claim 11 , wherein the coating is 5-70% by weight relative to the uncoated granule, wherein the coating comprises at least 60% by weight w/w of the salt and wherein the coating comprises a salt having a constant humidity at 20° C. of at least 60%.

Assignees

• Hede Peter Dybdahl
• Simonsen Ole
• Novozymes As

Inventors

• Hede Peter Dybdahl
• Simonsen Ole

Classifications

• C11D3/3723 Primary

  Polyamines or polyalkyleneimines · CPC title

• C11D3/38672

  Granulated or coated enzymes · CPC title

• C12N9/2437

  Cellulases (3.2.1.4; 3.2.1.74; 3.2.1.91; 3.2.1.150) · CPC title

• C12N9/98

  Preparation of granular or free-flowing enzyme compositions (C12N9/96 takes precedence) · CPC title

• C12N9/20

  Triglyceride splitting, e.g. by means of lipase · CPC title