Micellarly integrated oxidation protection for natural dyes

• US 20110293678A1
• Filed: 12/01/2009
• Published: 12/01/2011
• Est. Priority Date: 12/01/2008
• Status: Abandoned Application

• Current Assignee: Aquanova AG
• Original Assignee: Aquanova AG
• Inventors: Behnam, Dariush
• Application Number:
  US13/131,985
• Publication Number:
  US 20110293678A1
• Time in Patent Office: Days
• US Class Current: 424/401
• CPC Class Codes: A23L 2/58 Colouring agents
• CPC Class Codes: A23L 5/43 using naturally occurring organic dyes or pigments, their artificial duplicates or their derivatives
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C09B 61/00 Dyes of natural origin prepared from natural sources , e.g. vegetable sources
• CPC Class Codes: C09B 67/0005 the pigments being nanoparticles
• CPC Class Codes: C09B 67/0097 Dye preparations of special physical nature; Tablets, films, extrusion, microcapsules, sheets, pads, bags with dyes

Abstract

In order to formulate natural dyes, which are insoluble or sparingly soluble in water, in such a way that the dye is protected against oxidation, also and in particular after being incorporated into the end product with dilution, and which as a replacement for azo dyes in a beverage result in a solution which is clear to the human eye, the invention provides a solubilizate and a method for preparing a solubilizate. The solubilizate contains at least one natural dye that is insoluble or sparingly soluble in water, at least one emulsifier having an HLB value of 8 to 19, and at least two antioxidants. The dye and the antioxidants are present enclosed together in micelles.

Claims

1. A solubilizate containing:

a natural dye that is insoluble or sparingly soluble in water,

an emulsifier having an HLB value of 8 to 19, and

at least two antioxidants,

wherein the natural dye and the at least two antioxidants are present enclosed together in micelles.

2. The solubilizate according to claim 1,

containing at least one water-soluble antioxidant and at least one fat-soluble antioxidant.

3. The solubilizate according to claim 2,

wherein ascorbic acid and/or ascorbyl palmitate form(s) the water-soluble antioxidant and

wherein at least one tocopherol and/or carnolic acid and/or BHT and/or BHA and/or TBHQ form the fat-soluble antioxidant.

4. The solubilizate according to claim 3,

containing a-tocopherol and/or β

-tocopherol and/or y-tocopherol and/or δ

-tocopherol, or

containing a mixed tocopherol composed of a-tocopherol, β

-tocopherol, y-tocopherol, and δ

-tocopherol

as tocopherol.

5. The solubilizate according to claim 1,

which is dilutable with water to form a liquid that is transparent to the human eye.

6. The solubilizate according to claim 1,

wherein the emulsifier proportion relative to the total mass of the solubilizate is in the range of 65% by weight to 90% by weight.

7. The solubilizate according to claim 1,

wherein as the emulsifier, polysorbate is used, and/or a composition is used which contains one or more sugar esters of an edible fatty acid (E 473) in combination with at least one component which bears at least one OH group.

8. The solubilizate according to claim 1,

wherein the dye proportion relative to the total mass of the solubilizate is less than 23% by weight.

9. The solubilizate according to claim 1,

wherein the proportion of the water-soluble antioxidant relative to the total mass of the solubilizate is less than 10% by weight.

10. The solubilizate according to claim 1,

wherein the proportion of the water-soluble antioxidant relative to the total mass of the solubilizate is less than 1% by weight.

11. The solubilizate according to claim 1,

wherein the proportion of the fat-soluble antioxidant relative to the total mass of the solubilizate is less than 5% by weight.

12. The solubilizate according to claim 1, composed of:

at least one natural dye that is insoluble or sparingly soluble in water,

at least one emulsifier having an HLB value of 8 to 19, and

at least two antioxidants, of which one is water-soluble and the other is fat-soluble,

and water.

13. The solubilizate according to claim 1,

containing at least one further fat-soluble adjuvant.

14. The solubilizate according to claim 13, composed of:

at least one natural dye that is insoluble or sparingly soluble in water,

at least one emulsifier having an HLB value of 8 to 19, and

at least two antioxidants, of which one is water-soluble and the other is fat-soluble, water, and

at least one further fat-soluble adjuvant.

15. The solubilizate according to claim 1,

wherein the micelles have a diameter in the range of 4 nm to 30 nm, measured according to the principle of dynamic light scattering in a 180°

backscatter system, using laser light having a wavelength of 780 nm.

16. The solubilizate according claim 1,

the turbidity of which is less than 30 FNU, determined by scattered light measurement using infrared light according to the specifications of the ISO 7027 standard, at a 1:

1000 dilution of the solubilizate in water.

22. A method comprising:

utilizing the solubilizate according to claim 1 as an additive in foods or cosmetics or pharmaceuticals.

23. Food containing a solubilizate according to claim 1.

24. Cosmetic product containing a solubilizate according to claim 1.

25. Pharmaceutical product containing a solubilizate according to claim 1.

17. A method for preparing a solubilizate, comprising the following steps:

a) preparing a first mixture of at least one natural dye that is insoluble or sparingly soluble in water, and at least one emulsifier having an HLB value of 8 to 19,

b) heating the first mixture to a temperature in the range of 80°

C. to 150°

C., the temperature being adjusted corresponding to the characteristics of the dye,

c) cooling the first mixture to a temperature in the range of 50°

C. to 70°

C.,

d) preparing a second mixture of water and antioxidants,

e) heating the second mixture to a temperature in the range of 60°

C. to 70°

C.

f) combining the first mixture and the second mixture, with homogenization, and heating to a temperature in the range of 80°

C. to 90°

C. to form the solubilizate, in which the dye and the antioxidants are present enclosed together in micelles, and

g) cooling the solubilizate to a temperature below 50°

C.

18. The method according to claim 17,

wherein for preparing the first mixture, in addition to the dye and the emulsifier at least one fat-soluble adjuvant.

19. The method according to claim 18,

wherein step a) is carried out as follows:

a1) mixing the fat-soluble adjuvant,

a2) heating the mixture of emulsifier and fat-soluble adjuvant to a temperature in the range of 60°

C. to 95°

C., and

a3) combining the dye with the mixture of emulsifier and fat-soluble adjuvant.

20. The method according to claim 18,

wherein step a) is carried out as follows:

a11) mixing the dye with at least one fat-soluble adjuvant,

a22) heating the mixture of dye and fat-soluble adjuvant to a temperature in the range of 55°

C. to 85°

C., the temperature being adjusted according to the characteristics of the dye, and

a33) combining the emulsifier with the mixture of dye and fat-soluble adjuvant.

21. The method according to claim 17,

wherein for preparing the second mixture, in addition to water and the antioxidants at least one fat-soluble adjuvant.