Process for drying a suspension at room temperature

Patent metadata

Field	Value
Publication number	US-2019045824-A1
Application number	US-201716074076-A
Country	US
Kind code	A1
Filing date	Feb 2, 2017
Priority date	Feb 2, 2016
Publication date	Feb 14, 2019
Grant date	—

Abstract

The present invention relates to a new process for the preparation of powdered microcapsules encapsulating active volatile active ingredients, in particular a perfume or a flavour, said process being performed at room temperature. Powdered microcapsules obtainable by said process are also an object of the invention. Perfuming and flavouring compositions as well as consumer products comprising said capsules are also part of the invention.

First claim

1 . A process for preparing a powdered microencapsulated composition comprising the steps of:
a) Preparing an oil-in-water suspension containing
(i) an oil phase comprising an active ingredient, preferably a perfume or a flavor, said oil being dispersed in
(ii) a water phase including a water-soluble carbohydrate carrier; and
(iii) optionally an emulsifier
wherein the weight ratio between the oil phase and the water is above 1;
b) Blending at room temperature the suspension obtained under step a) with a desiccant powder to form a free-flowing microcapsule powder, said process being characterized in that the weight difference Δ between the water sorption of the desiccant and the water sorption of the carrier, at 50% relative humidity and at 25° C., is positive; c) Optionally sifting the obtained powder to remove the excess desiccant.

2 . The process according to claim 1 , wherein the suspension comprises a perfume or a flavour freely dispersed in the water phase.

3 . The process according to claim 1 , wherein the suspension comprises a perfume or flavour oil wherein part of said oil is freely dispersed in the water phase and another part of the oil is dispersed in an encapsulated form in the water phase.

4 . The process according to claim 1 , wherein the suspension comprises a perfume or flavour oil wherein the oil is dispersed in an encapsulated form in the water phase.

5 . The process according to claim 1 , wherein the water-soluble carbohydrate carrier is present in an amount comprised between 25 and 40 wt % of the suspension.

6 . The process according to claim 1 , wherein the desiccant is used in an amount such that the weight ratio between the desiccant and the liquid suspension is comprised between 1 and 9.

7 . The process according to claim 1 , wherein the water-soluble carbohydrate carrier material comprises of at least one emulsifying polymer with a molecular weight (Mn) below 3000 Dalton.

8 . The process according to claim 1 , wherein the water-soluble carbohydrate carrier material comprises at least one starch hydrolysate with a molecular weight (Mn) lower than 1500 Dalton, and the suspension comprises an emulsifier, selected from the group consisting of lecithin, glycerol esters, fatty acid esters, saponins, proteins, gum arabic; and mixtures thereof.

9 . The process according to claim 1 , wherein the desiccant is selected from the group consisting of maltodextrin, starch, polyvinyl acetate, polyvinyl alcohol, dextrines, natural or modified starch, vegetable gums, pectins, xanthanes, alginates, carragenans, cellulose derivatives and mixtures thereof.

10 . The process according to claim wherein a flowing agent is added to the suspension, wherein the flowing agent is selected from the group consisting of silicate, rice hull fibers, tricalcium phosphate and magnesium stearate.

11 . The process according to claim 3 , wherein the encapsulated perfume or flavor consists of water-insoluble microcapsules obtainable by a process selected from the group consisting of interfacial polymerisation, polycondensation, simple and complex coacervation.

12 . A non-spherical perfuming or flavouring powdered microcapsules, obtainable by a process according to claim 1 .

13 . A perfuming composition comprising
(i) Non-spherical perfuming powdered microcapsules as defined in claim 12 ; (ii) At least one perfuming co-ingredient; (iii) Optionally a perfumery adjuvant.

14 . A perfumed consumer product comprising:
a) from 2 to 65% by weight, relative to the total weight of the consumer product, of at least one surfactant; b) non-spherical perfuming powdered microcapsules as defined in claim 12 .

15 . The powder consumer product according to claim 14 , wherein the product is a powder detergent.

16 . A food or beverage consumer product comprising non-spherical flavouring powdered microcapsules as defined in claim 12 , the consumer product being selected from the group consisting of a stock, a savory cube, a powder mix, a beef or pork based product, a seafood, surimi, instant noodles, rice, pasta, potatoes flakes or fried, noodles, a potato/tortilla chip, a microwave popcorn, nuts, a bretzel, a rice cake, a rice cracker, and powdered drinks.

17 . The process according to claim 1 , wherein the weight ratio between the oil phase and the water is above 1.5.

18 . The process according to claim 1 , wherein Δ is at least 1%.

19 . The process according to claim 1 , wherein Δ is at least 2%.

Assignees

• Firmenich & Cie

Inventors

• Bouquerand Pierre-Etienne
• Elabbadi Amal
• Maio Serge
• Dardelle Gregory
• Normand Valery

Classifications

• B01J13/22 Primary

  Coating · CPC title

• A23L27/72 Primary

  Encapsulation · CPC title

• C11D3/505

  encapsulated or adsorbed on a carrier, e.g. zeolite or clay · CPC title

• A23L29/212

  Starch; Modified starch; Starch derivatives, e.g. esters or ethers (containing starch hydrolysates, e.g. dextrin, A23L29/30) · CPC title

• A23L29/35

  Degradation products of starch, e.g. hydrolysates, dextrins; Enzymatically modified starches · CPC title