Colouring composition comprising starch derivatives as a hydrocolloid

Abstract

The present invention relates to a colouring composition to be used in the manufacture of food and pharmaceutical products.

Claims

1. A water-dispersible composition comprising at least one hydrophilic or hydrophobic, water-insoluble solid pigment comprising metal chelates of carminic acid, and at least 5 wt % of at least one starch octenyl succinate derivative as a hydrocolloid.

2. The water-dispersible composition according to claim 1, wherein the solid pigment is insoluble in aqueous media at below neutral pH but soluble in aqueous media at a pH in the alkaline range.

3. The water-dispersible composition according to claim 1 wherein the solid pigment has an average particle diameter of less than 10 ?m.

4. The water-dispersible composition according to claim 1 wherein the solid pigment has an average particle diameter of less than 5 ?m.

5. The water-dispersible composition according to claim 1 wherein the solid pigment has an average particle diameter of less than 2 ?m.

6. The water-dispersible composition according to claim 1 wherein the at least one hydrocolloid is present in an amount of at least 10 wt % based on the total composition.

7. The water-dispersible composition according to claim 1 wherein the at least one hydrocolloid is present in an amount of at least 20 wt % based on the total composition.

8. The water-dispersible composition according to claim 1 having a water content of more than 5 wt % based on the total composition.

9. The water-dispersible composition according to claim 1 having a water content of less than 5 wt % based on the total composition.

10. A water-dispersible composition obtained by preparing a suspension of at least one hydrophilic or hydrophobic, water-insoluble solid pigment comprising metal chelates of carminic acid by comminuting the pigment in the presence of at least 5 wt % of at least one starch octenyl succinate derivative as a hydrocolloid in an aqueous media.

11. The water-dispersible composition according to claim 10 wherein the solid pigment has an average particle diameter of less than 10 ?m.

12. The water-dispersible composition according to claim 10 wherein the solid pigment has an average particle diameter of less than 5 ?m.

13. The water-dispersible composition according to claim 10 wherein the solid pigment has an average particle diameter of less than 2 ?m.

14. The water-dispersible composition according to claim 10 wherein the at least one hydrocolloid is present in an amount of at least 10 wt %.

15. The water-dispersible composition according to claim 10 wherein the at least one hydrocolloid is present in an amount of at least 20 wt %.

16. The water-dispersible composition according to claim 10 wherein the water content in the composition is reduced to less than 5 wt %.

17. An edible product comprising a water-dispersible composition according to claim 1.

18. A pharmaceutical product comprising a water-dispersible composition according to claim 1.

19. A method of colouring an edible or pharmaceutical product, the method comprising adding to the edible or pharmaceutical product the water-dispersible composition of claim 1.

20. The water-dispersible composition according to claim 1, wherein the ratio of the total amount of starch octenyl succinate derivative present to the total amount of pigment present is from 1:2 to 2:1 (weight/weight).

21. The water-dispersible composition according to claim 1, wherein the composition does not contain an organic solvent.

22. The water-dispersible composition according to claim 10, wherein the ratio of the total amount of starch octenyl succinate derivative present to the total amount of pigment present is from 1:2 to 2:1 (weight/weight).

23. The water-dispersible composition according to claim 10, wherein the composition does not contain an organic solvent.

Description

EXAMPLES

(1) In the following, the preparation of water-dispersible compositions comprising a hydrophilic, water-insoluble solid pigment and starch octenyl succinate derivates is described. Particle size measurements were performed on a Malvern Mastersizer, Malvern Instruments, Worsc. WR 14 1XZ, UK.

(2) The colouring characteristics of these compositions were tested using a Minolta Tristimulus CT 310 apparatus in a standardised soft drink system at a standard pigment content. For bixin, the colouring substance content was 20 ppm, for the metal chelates of carminic acid 20 ppm, for curcumin 30 ppm and for chlorophyllin 30 ppm.

(3) The soft drink system was prepared from a concentrate having the following composition:

(4) TABLE-US-00001 Sucrose 430.0 g Na-benzoate, food grade 0.7 g K-sorbate, food grade 0.9 g Ascorbic acid 0.1 g Citric acid mono-hydrate, food-grade 8.6 g Demineralised water Ad 1 litre

(5) The concentrate was diluted 1:4 before use with demineralised water. The diluted ready-to-use soft drink medium had a pH of 3.0?0.2.

(6) The measured tristimulus values were compared with specifications for commercial pigment products. The key parameter is the so-called chroma value which provides an indication of the colouring strength or colouring power of the colouring substance suspension product. For curcumin, the chroma value should exceed 25, for chlorophyllin the value should exceed 19, for metal chelates of carminic acid the value should exceed 33 and for carotenoids the value should exceed 14 at the above-mentioned pigment levels.

(7) In the following examples and comparative examples, the abbreviation nOSA refers to n-octenyl succinate anhydride. Weight percentages are based on the total weight of the composition.

Comparative Example 1

(8) A suspension consisting of 15.0 wt % of non-nOSA modified starch (Ultra-Tex 3, National Starch, E1442), 31.5 wt % turmeric powder and 53.5 wt % demineralised water was prepared. When the starch had been dissolved and the turmeric powder had been sufficiently wetted it was attempted to mill the suspension through a laboratory ball mill (Dispermat SL VMA-Getzmann GmbH). This was not possible due to a too high viscosity of the suspension.

Comparative Example 2

(9) A suspension consisting of 5.0 wt % of non-nOSA modified starch (Ultra-Tex 3, National Starch, E1442), 16.5% turmeric powder and 78.5 wt % demineralised water was prepared. When the starch had been dissolved and the turmeric powder had been sufficiently wetted it was attempted to mill the suspension through a laboratory ball mill (Dispermat SL VMA-Getzmann GmbH). This was not possible due to a too high viscosity of the suspension.

Comparative Example 3

(10) A suspension consisting of 5.0 wt % of non-nOSA modified starch (Ultra-Tex 3, National Starch, E1442), 11.5% turmeric powder and 83.5 wt % demineralised water was prepared. When the starch had been dissolved and the turmeric powder had been sufficiently wetted the suspension was run through a laboratory ball mill (Dispermat SL VMA-Getzmann GmbH). After 5 runs through the mill a chroma value of 8 was obtained which is significantly below the desired minimum value of 25.

(11) A mean particle diameter of 15 ?m was measured.

Comparative Example 4

(12) A suspension consisting of 10.0% of non-nOSA modified starch (Ultra-Tex 2000, National Starch, E1442), 31.5 wt % turmeric powder and 58.5 wt % demineralised water was prepared. When the starch had been dissolved and the turmeric powder had been sufficiently wetted it was attempted to mill the suspension through a laboratory ball mill (Dispermat SL VMA-Getzmann GmbH). This was not possible due to a too high viscosity of the suspension.

Comparative Example 5

(13) A suspension consisting of 5.0 wt % of non-nOSA modified starch (Ultra-Tex 2000, National Starch, E1442), 6.5 wt % turmeric powder and 88.5 wt % demineralised water was prepared. When the starch had been dissolved and the turmeric powder had been sufficiently wetted the suspension was run through a laboratory ball mill (Dispermat SL VMA-Getzmann GmbH). After 5 runs through the mill a chroma value of 15 was obtained which is significantly below the desired minimum value of 25.

(14) A mean particle diameter of 7 ?m was measured.

Comparative Example 6

(15) A suspension consisting of 10.0% of non-nOSA modified starch (Instant Textaid A, National Starch, E1412), 11.5 wt % turmeric powder and 78.5 wt % demineralised water was prepared. When the starch had been dissolved and the turmeric powder had been sufficiently wetted it was attempted to mill the suspension through a laboratory ball mill (Dispermat SL VMA-Getzmann GmbH). This was not possible due to a too high viscosity of the suspension.

Comparative Example 7

(16) A suspension consisting of 5.0 wt % of non-nOSA modified starch (Instant Textaid A, National Starch, E1412), 6.5 wt % turmeric powder and 88.5% demineralised water was prepared. When the starch had been dissolved and the turmeric powder had been sufficiently wetted the suspension was run through a laboratory ball mill (Dispermat SL VMA-Getzmann GmbH). After 5 runs through the mill a chroma value of 7 was obtained which is significantly below the desired minimum value of 25.

(17) A mean particle diameter of 4 ?m was measured.

Comparative Example 8

(18) A suspension consisting of 3.33 wt % of nOSA modified starch (Cleargum, Roquette Fr?res, E1450), 10.0 wt % turmeric powder, 46.7 wt % sucrose and 40.0 wt % demineralised water was prepared. When the starch had been dissolved and the turmeric powder had been sufficiently wetted the suspension was run through a laboratory ball mill (Dynomill type KDL). After 2 runs through the mill a chroma value of 12 was obtained which is significantly below the desired minimum value of 25.

Example 1

(19) A suspension consisting of 20.0 wt % of nOSA modified starch (HiCap 100, National Starch, E1450), 31.5 wt % turmeric powder and 48.5% demineralised water was prepared. When the starch had been dissolved and the turmeric powder had been sufficiently wetted the suspension was run through a laboratory ball mill (Dispermat SL VMA-Getzmann GmbH). After 5 runs through the mill a chroma value of 37 was obtained which is significantly above the desired minimum value of 25.

(20) A mean particle diameter of 0.5 ?m was measured.

Example 2

(21) A suspension consisting of 15.0 wt % of nOSA modified starch (HiCap 100, National Starch, E1450), 31.5 wt % turmeric powder and 53.5 wt % demineralised water was prepared. When the starch had been dissolved and the turmeric powder had been sufficiently wetted the suspension was run through a laboratory ball mill (Dispermat SL VMA-Getzmann GmbH). After 5 runs through the mill a chroma value of 44 was obtained which is significantly above the desired minimum value of 25.

(22) A mean particle diameter of 0.5 ?m was measured.

(23) The colour preparation prepared in example 2 was subsequently dried on a standard laboratory spray drier.

Example 3

(24) A solution of 50.0 g of Cu-chlorophyllin in 100.0 g of demineralised water was prepared (in the following referred to as solution (1)).

(25) Another solution of 100.0 g of nOSA modified starch (Capsul TA, National Starch, E1450) and 17.5 g of citric acid in 232.5 g of demineralised water was prepared (in the following referred to as solution (2)).

(26) Solution (1) was slowly added to solution (2) under stirring. In this way a suspension of precipitated chlorophyllin was prepared. The suspension was run through a laboratory ball mill (Dispermat SL VMA-Getzmann GmbH) for one hour. After 5 runs through the mill a chroma value of 20 was obtained which is above the desired minimum value of 18.

(27) A mean particle diameter of 3.66 ?m was measured.

Example 4

(28) A suspension consisting of 10.0 wt % of nOSA modified starch (Capsul TA, National Starch, E1450), 20.0% of carmine lake, 5.0 wt % of propylene glycol and 65.0 wt % demineralised water was prepared. When the starch had been dissolved and the carmine lake powder had been sufficiently wetted the suspension was run through a laboratory ball mill (Dispermat SL VMA-Getzmann GmbH). After 5 runs through the mill a chroma value of 34 was obtained which is above the desired minimum value of 33.

(29) A mean particle diameter of 1.5 ?m was measured.

Example 5

(30) A suspension consisting of 20.0 wt % of nOSA modified starch (Capsul TA, National Starch, E1450), 17.0 wt % carmine lake (Chr. Hansen A/S) and 63.0 wt % demineralised water was prepared. When the starch had been dissolved and the carmine lake had been sufficiently wetted the suspension was run through a laboratory ball mill (Dispermat SL VMA-Getzmann GmbH). After 2 runs through the mill a chroma value of 35 was obtained which is above the desired minimum value of 33.

Example 6

(31) A suspension consisting of 25.0 wt % of nOSA modified starch (HiCap 100, National Starch, E1450), 26.5 wt % turmeric powder and 48.5 wt % demineralised water was prepared. When the starch had been dissolved and the turmeric powder had been sufficiently wetted the suspension was run through a laboratory ball mill (Dispermat SL VMA-Getzmann GmbH). After 2 runs through the mill a chroma value of 43 was obtained which is above the desired minimum value of 25.

Example 7

(32) A suspension consisting of 20.0 wt % of nOSA modified starch (HiCap 100, National Starch, E1450), 22 wt % crystalline bixin (Chr. Hansen A/S) and 58.0 wt % demineralised water was prepared. When the starch had been dissolved and the crystalline bixin had been sufficiently wetted the suspension was run through a pilot scale ball mill (FrymaKoruna MS12, Romaco AG, FrymaKoruna, CH 4310 Rheinfelden, Switzerland). After 3 runs through the mill a chroma value of 18 was obtained which is above the desired minimum value of 14.

Example 8

(33) A suspension consisting of 20.0 wt % of nOSA modified starch (HiCap 100, National Starch, E1450), 17 wt % crystalline bixin (Chr. Hansen A/S) and 63.0 wt % demineralised water was prepared. When the starch had been dissolved and the crystalline bixin had been sufficiently wetted the suspension was run through a pilot scale ball mill (FrymaKoruna MS12, Romaco AG, FrymaKoruna, CH 4310 Rheinfelden, Switzerland) (3 runs through the mill). After dilution to 35% dry matter, the colour preparation was dried on a standard laboratory spray drier.

Example 9

(34) A suspension consisting of 15.0 wt % of nOSA modified starch (HiCap 100, National Starch, E1450), 26.5 wt % turmeric powder and 53.5 wt % demineralised water was prepared. When the starch had been dissolved and the turmeric powder had been sufficiently wetted the suspension was run through a pilot scale ball mill (FrymaKoruna MS12, Romaco AG, FrymaKoruna, CH 4310 Rheinfelden, Switzerland) (3 runs through the mill). After dilution to 25 wt % dry matter, the colour preparation was dried on a standard laboratory spray drier.

Example 10

(35) First a solution consisting of 300 g of nOSA modified starch (HiCap 100, National Starch, E1450), 45 g of citric acid and 630 grams of demineralised water was prepared.

(36) Then a solution of 225 g of sodium copper chlorophyllin and 300 g of demineralised water was prepared.

(37) The sodium copper chlorophyllin solution was then slowly added to the nOSA starch solution-citric acid under vigorous stirring.

(38) The resulting suspension was run through a pilot scale ball mill (FrymaKoruna MS12, Romaco AG, FrymaKoruna, CH 4310 Rheinfelden, Switzerland). After 3 runs through the mill a chroma value of 22 was obtained which is above the desired minimum value of 18.

(39) In Table 1 below, the chroma values for the water-dispersible compositions are summarised:

(40) TABLE-US-00002 TABLE 1 Chroma values of water dispersible colouring substance products in a standard soft drink medium. Desired Found: chroma value desired Starch type Found chroma (minimum chroma Example Pigment and amount value specification) value Comparative Turmeric non-nOSA Ultra- n.a. 25 n.a. Example 1 Tex 3, E 1442 15 wt % Comparative Turmeric non-nOSA Ultra- n.a. 25 n.a. Example 2 Tex 3, E 1442 5 wt % Comparative Turmeric non-nOSA Ultra- 8 25 0.32 Example 3 Tex 3, E 1442 5 wt % Comparative Turmeric non-nOSA Ultra- n.a. 25 n.a. Example 4 Tex 2000, E 1442 10 wt % Comparative Turmeric non-nOSA Ultra- 15 25 0.60 Example 5 Tex 2000, E 1442 5 wt % Comparative Turmeric non-nOSA Instant n.a. 25 n.a. Example 6 Textaid, E 1412 10 wt % Comparative Turmeric non-nOSA Instant 7 25 0.28 Example 7 Textaid, E 1412 5 wt % Comparative Turmeric nOSA Clear- 12 25 0.48 Example 8 Gum, E 1450 3.33 wt % Example 1 Turmeric nOSA 37 25 1.48 HiCap 100, E 1450 20 wt % Example 2 Turmeric nOSA 44 25 1.76 HiCap 100, E 1450 15 wt % Example 3 Cu- nOSA 20 18 1.11 chlorophyllin Capsul TA, E 1450 20 wt % Example 4 Carmine lake nOSA 34 33 1.03 Capsul TA, E 1450 10% Example 5 Carmine lake nOSA 35 33 1.06 Capsul TA, E 1450 8.5 wt % Example 6 Turmeric nOSA Clear- 43 25 1.72 Gum, E 1450 25 wt % Example 7 Crystalline nOSA 18 14 1.29 bixin HiCap 100, E 1450 20 wt % Example 8 Crystalline nOSA n.a. 14 n.a. bixin HiCap 100, E 1450 20 wt % Example 9 Turmeric nOSA n.a. 25 n.a. HiCap 100, E 1450 15 wt % Example 10 Sodium Cu- nOSA 22 18 1.17 chlorophyllin HiCap 100, E 1450 20 wt %

REFERENCES

(41) 1. WO-A-2002/08182 2. U.S. Pat. No. 3,110,598 3. EP-A-0239086