POWDER CONTAINING CRYSTALS COMPRISING INGREDIENTS ENCLOSED THEREIN

Abstract

The present invention primarily relates to a method for producing a powder containing a plurality of capsules incorporated into crystals, wherein these capsules contain one or more ingredients. Further, the present invention relates to the respective powder, as well as product containing this powder, the use of the powder as well as methods for producing respective products and methods for perfuming substrates.

Claims

1. A method for producing a powder comprising a plurality of capsules (K) enclosed in crystals and containing one or more ingredients, comprising: (i) providing one or more solvents, providing one or more crystallisable materials and providing capsules (K) containing one or more ingredients, (ii) optionally, increasing the temperature of the one or more solvents, (iii) adding (iii.1) the one or more crystallisable materials and (iii.2) optionally, the capsules (K) before, after or simultaneously with the crystallisable materials, to the one or more solvents and solving the one or more crystallisable materials in the one or more solvents to obtain a mixture (M1), (iv) reducing the temperature of the mixture (M1) to a temperature below or even with the crystallization of the one or more crystallisable materials, (v) adding the capsules (K) or, respectively, further capsules (K), wherein (v) is optional in case (iii.2) is applied, (vi) further reduction of the temperature of the mixture (M1) to obtain a mixture (M2) comprising a plurality of capsules (K) enclosed in crystals and containing one or more ingredients, (vii) collecting crystals containing capsules containing one or more ingredients.

2. The method according to claim 1, wherein at least one of the one or more solvents are selected from the group consisting of water and solvents which can be mixed with water.

3. The method according to claim 1, wherein at least one of the one or more crystallisable materials can be crystallized in a solvent which can be mixed with water or in water and/or is/are selected from the group consisting of salts.

4. The method according to claim 1, wherein several or all of the capsules (K) contain one or more ingredients from the group consisting of aromatic substances, flavours, cosmetic ingredients, pharmaceutically active substances, insect repellents, ingredients for oral and dental care agents, latent heat accumulators and adsorbents.

5. The method according to claim 1, wherein several or all capsules (K) have a wall material comprising one or more of the substances selected from the group consisting of natural, semi-synthetic and fully synthetic shell materials.

6. The method according to claim 1, wherein the one or more solvents are heated in (ii), if present, to a temperature in the range of from 23 to 50 C.

7. The method according to claim 1, wherein (iii) comprises stirring to dissolve the one or more crystallisable materials in the one or more solvents or to facilitate the same.

8. The method according to claim 1, wherein the temperature of the mixture (M1) is reduced to a temperature of <20 C. in (vi), wherein the reduction of the temperature is applied within a time frame in the range of from 0.25 to 3 hours.

9. The method according to claim 1, wherein (vii) comprises at least one of the following: decanting the one or more solvents, separating the crystals, drying the mixture (M2) obtained in (vi) and/or the filtered crystals, to obtain a powder comprising a plurality of capsules (K) enclosed in crystals and containing the one or more ingredients.

10. The method according to claim 1, wherein the weight ratio of the total amount of the one or more solvents to the total amount of the one or more crystallisable materials to the total amount of capsules (K) in (i): 1-10:0.5-5:0.13.

11. A powder comprising the plurality of capsules enclosed in the crystals and containing the one or more ingredients produced by a method according to claim 1.

12. A product selected from the group consisting of washing and cleaning agents, body care products, compositions serving for food or pleasure, cosmetic or pharmaceutical compositions, perfumed or perfuming products or products to be perfumed, wherein the product comprises the powder according to claim 11.

13. The powder according to claim 11, wherein several or all of the capsules (K) contain one or more ingredients of the group selected from cooling agents, aromatic substances and flavours.

14. The method according to claim 9 further comprising: mixing (1) the powder comprising the plurality of capsules enclosed in the crystals and containing the one or more ingredients, and (2) one or more further components.

15. The method of claim 9 further comprising: applying the powder or a product formed therefrom onto a substrate(s) to be perfumed, wherein several or all of the capsules (K) of the powder contain one or more ingredients of the group consisting of aromatic substances and flavours.

16. The method of claim 5, wherein the wall material of several or all capsules (K) comprise one or more of melamine formaldehyde resins, gelatin, alginates, polyurethans, polyamides and polycarbamides.

17. The method of claim 7 comprising stirring at a speed of 100 to 1,871 rotations/min (U/min).

18. The powder according to claim 13, wherein the one or more ingredients are present in an amount sufficient for imparting a cooling effect and/or for imparting, modifying or enhancing a sensory impression.

19. The method according to claim 15, wherein the substrate is at least one of hair, skin, fibres, and leather.

20. The method according to claim 3, wherein at least one of the one or more crystallisable materials are alkali salts, alkaline earth salts, sodium salts, sodium sulfate, sodium chloride, sodium carbonate, sugars, urea, or a combination thereof.

Description

EXAMPLE 1 (ACCORDING TO THE INVENTION)

[0103] 450 g of water are warmed to approximately 33 C. Subsequently, 200 g of sodium sulfate are dissolved by stirring and slowly cooled. When the crystallization initiates, 150 g capsule dispersion (710544 Symcap Tomcap, Symrise) are added and cooled to approximately 2 C. and subsequently the precipitation is filtered. The filter cake is then dried.

EXAMPLE 2 (ACCORDING TO THE INVENTION)

[0104] 450 g of water are warmed to approximately 40 C., then 167 g sodium carbonate are added and dissolved while stirring. Subsequently 150 g capsule dispersion (710544 Symcap Tomcap, Symrise) and further 50 g of water are added. Subsequently it is cooled to 1.0 C. After filtering, the filter residue is dried.

EXAMPLE 3 (ACCORDING TO THE INVENTION)

[0105] 250 g of water are warmed to approximately 37 C. and subsequently 200 g sodium acetate are dissolved while stirring. Subsequently the mixture is cooled to 26 C. and when the crystallization initiates, 150 g capsule dispersion (710544 Symcap Tomcap, Symrise) are added and cooled to 1.7 C. within approximately 1 hour. Afterwards, the precipitation is filtered and the filter cake is dried at room temperature.

EXAMPLE 4 (ACCORDING TO THE INVENTION)

[0106] A mixture of 330 g water, 206 g modified corn starch (Capsul, Ingredion), 27.0 g maltose monohydrate, 17.5 g luviskol K-30 and 150 g capsule dispersion (710544 Symcap Tomcap, Symrise) are spray dried (inlet temperature 190 C., outlet temperature 90 C.) in a spray dryer (Bchi B 290).

EXAMPLE 5 (ACCORDING TO THE INVENTION)

[0107] 450 g of water are warmed to approximately 80 C. Then, 450 g urea are dissolved while stirring. Subsequently 150 g capsule dispersion (710544 Symcap Tomcap, Symrise) are added, subsequently it is cooled to room temperature and the precipitation is filtered. The filter cake is subsequently dried.

EXAMPLE 6 (ACCORDING TO THE INVENTION)

[0108] 500 g of water are warmed to approximately 40 C. Then 100 g sodium sulfate are dissolved while stirring. Subsequently 20 g of capsule dispersion (710544 Symcap Tomcap, Symrise) are added, subsequently cooled to 25 C. Afterwards, the mixture is further cooled to approximately 1.7 C. and the further 20 g sodium sulfate are added as seed crystal and the arising precipitation is filtered. The filter cake is subsequently dried.

EXAMPLE 7 (COMPARISON)

[0109] For preparing a sensory comparison, each, 0.200 g sample according to example 4, 0.207 g sample according to example 1 were added to 40 g washing powder and 0.08 g 710544 Symcap Tomcap (Symrise AG, Holzminden, Germany) were added to 40 g washing powder (Denk mit Vollwaschmittel Ultra Sensitive Pulver, dm-drogerie markt GmbH+Co. KG, Karlsruhe, Germany) and were mixed. Subsequently, the samples obtained in this way were washed on 2 kg terry cloth each (Fa. Karl Heinz Hesse GmbH, Dransfeld, Germany, Waschlappen TB1, 80% BW, 20% PES, 3030 cm) in a standard European washing machine at 40 C. Subsequently, the terry cloths were dried on the line at room temperature. The anonymised samples were then smelled by a panel of 14 experts each without mechanical stress (untreated), after soft kneading of the laundry (kneaded) and after rubbing the cloths with each other (rubbed) and the intensity of the smell was evaluated on a scale ranging from 1 to 9. The result (cf. FIG. 2) shows that the release of the capsules or, respectively, of their ingredients in the washing powder, produced by the method according to the invention, compared with spray dried capsules (according to example 4) or in comparison with the use of liquid capsule dispersion alone (710544 Symcap Tomcap) is not reduced.

EXAMPLE 8 (ACCORDING TO THE INVENTION)

[0110] 500 g of water are warmed to approximately 33 C. Then, 200 g of sodium sulfate are dissolved while stirring. Subsequently, the mixture is cooled slowly, the crystallisation initiates and first small crystals are forming. Then 198 g of Folco Microdeur (Follmann GmbH & Co. KG, Minden, Germany) are added and it is cooled to 1.7 C. Subsequently, the precipitation is filtered and the filter cake is dried.