WO2017186604A1 - Verfahren zur herstellung von mikrokapseln - Google Patents
Verfahren zur herstellung von mikrokapseln Download PDFInfo
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- WO2017186604A1 WO2017186604A1 PCT/EP2017/059581 EP2017059581W WO2017186604A1 WO 2017186604 A1 WO2017186604 A1 WO 2017186604A1 EP 2017059581 W EP2017059581 W EP 2017059581W WO 2017186604 A1 WO2017186604 A1 WO 2017186604A1
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- WIPO (PCT)
- Prior art keywords
- microcapsules
- oil
- emulsion
- methyl
- dispersion
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/06—Making microcapsules or microballoons by phase separation
- B01J13/14—Polymerisation; cross-linking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/06—Making microcapsules or microballoons by phase separation
- B01J13/14—Polymerisation; cross-linking
- B01J13/18—In situ polymerisation with all reactants being present in the same phase
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/20—After-treatment of capsule walls, e.g. hardening
- B01J13/206—Hardening; drying
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/50—Perfumes
- C11D3/502—Protected perfumes
- C11D3/505—Protected perfumes encapsulated or adsorbed on a carrier, e.g. zeolite or clay
Definitions
- the invention is in the field of encapsulation of active ingredients and relates to a new method by means of which, in particular, the process control can be improved in terms of stability and size of the particles.
- capsule is understood by the person skilled in the art to mean fine-dispersed liquid or solid phases coated with film-forming polymers, in the preparation of which the polymers precipitate on the material to be enveloped after emulsification and coacervation or interfacial polymerization.
- microcapsules having diameters in the range of about 0.0001 to 5, preferably 0.001 to 0.5 and in particular 0.005 to 0.1 mm.
- the first industrial production of microcapsules dates back to 1957, when it first commercialized copy paper containing the dyes in a microencapsulated fashion.
- Today, countless types of microcapsules are commercially available and used in a wide variety of fields.
- An important segment is the finishing of fibers and textiles with microencapsulated agents, which are applied either during finishing or during the washing process. When worn, the capsules break open due to mechanical stress and release the fragrance over a longer period of time.
- microcapsules include those of the aminoplast type.
- the preparation of these capsules is carried out in a simplified manner by first preparing under high shear and in the presence of emulsifiers an O / W emulsion containing the water-soluble monomer, a so-called amine-formaldehyde precondensate, and the water-insoluble active ingredient, such as a perfume oil ,
- the polycondensation is initiated by a pH change, for example by adjusting the pH to about 3.5 by addition of acid.
- the polycondensates deposit on the oil droplets in the emulsion and gradually envelop them. After completion of the polycondensation, a microcapsule dispersion has developed from the emulsion.
- the capsules still have a soft, elastic shell, which does not yet provide the necessary diffusion stability and texture properties. It follows therefore the third step, in which one raises the temperature to about 60 ° C, which leads to a cross-linking of the polymers in the wall and to the curing of the capsules.
- a corresponding method is known, for example, from EP 2111214 Bl (GIVAUDAN).
- DE 23 03 866 A1 discloses a stable concentrated mixture for the production of microcapsules comprising (a) an epoxypropyl trialkylammonium salt and (b) one or more organic solvents, these preparations additionally comprising an alkyl sulfosuccinate, which has alkyl groups having 6 to 16 carbon atoms, or an alkylsulfosuccinamate whose carboxylic acid amide group is substituted with an alkyl group having 8 to 20 carbon atoms, and a water-miscible solvent as component b).
- the subject of EP 2669835 A1 is a process for the production of microcapsules.
- the characteristic of these capsules is a special particle size distribution having at least two maxima, wherein the main maximum of the particle size in the range of 5 to 100 ⁇ and wherein the capsules of the micro-capsules whose particle size is less than or equal to the particle size of the main maximum, occupied volume is greater than or equal to about 20% of the total volume of the microcapsules.
- the capsule wall may consist of a methylated melamine-formaldehyde resin and / or urea-formaldehyde resin and / or reaction products of aldehydes with thiourea, N-alkylurea, guanidine, acetoguanamine, benzoguanamine, caprionoguanamine, cyanamine, dicyandiamide and / or alkyl / arylsulfonamide.
- a first important aspect of microencapsulation relates to particle size distribution.
- the capsule size adjustment has a direct impact on the fracture properties of the capsules and thus also on the sensory performance of the technology in the final application.
- the second essential aspect is the stabilization of the emulsion.
- appropriate surfactants or protective colloids must be matched to the prepolymers used.
- the selection of a wrong protective colloid can lead to a faulty encapsulation.
- the complex object of the present problem has therefore been to improve the state of the art with regard to the production of microcapsules, especially of aminoplast microcapsules, in such a way that the mean diameter of the capsules is reduced and unified.
- a possible monodisperse particle size distribution is sought, which has a more pronounced maximum at smaller diameters.
- the sought process should also allow auskom men due to higher emulsion stability with lower shear, so as to release less disturbing polymer grit from destroyed capsules.
- a first subject of the invention relates to a process for the preparation of microcapsules, especially aminoplast microcapsules, comprising the following steps:
- step (d) polymerizing the at least one prepolymer contained in the emulsion of step (c) to obtain a dispersion of microcapsules enclosing the active ingredient;
- step (e) curing and crosslinking the microcapsules obtained in step (d), and optionally
- step (c) which is characterized in that the formation of the emulsion in step (c) takes place in the presence of at least one 1,2-diol.
- Figure 1 shows a particle size distribution in the production of aminoplast microcapsules once with the addition of 1 wt .-% SymDiol ® 68 (l, 2-hexanediol: 1, 2-octanediol 1: 1) (left) and once without addition of the diol (right). It can be seen that the maximum is more pronounced and shifted to smaller particle diameters.
- the particle size distribution is in the process of the prior art, for example in that which is described in EP 2111214 Bl, 10 to 80 ⁇ .
- diols By adding diols can be reduced to about 10 to 35 ⁇ .
- This narrower distribution allows you to make capsule systems that can be more easily optimized in your sensory performance.
- the size of the capsules flows according to the Stroischen law with in the separation speed. A more uniform distribution makes it possible, for example, to tailor the density of the perfume oils in a detergent base more accurately.
- the speed of the stirrer in this case can be reduced by 200 to 260 rpm, which corresponds to an average reduction of about 15%.
- the capsule diameter also has an influence on the density according to the following formula:
- V (p) 2r2g (pk-pf)
- V (p) represents the sedimentation velocity
- g a gravity factor
- pk the capsule density
- pf the liquid density
- ⁇ the viscosity of the liquid
- Figure 3 shows two microcapsule dispersions: the left was prepared by the standard method and has an average particle diameter of about 50 ⁇ , the right was prepared with the addition of 1,2-diols and has an average particle diameter of about 22 ⁇ on.
- the microcapsules are homogeneously dispersed in the sample according to the invention, while they have fallen to the ground in the comparative sample.
- the fine fraction leads to increased turbidity, for example in the detergent or softener base, which is considered by the consumer to be a reduction in quality.
- the fines can lead to a sediment in the application and additionally causes a negative visual effect in the final product.
- the addition of the diols leads to an optimized and controlled polymer deposition, whereby the shell thickness can be reduced. In particular, the risk that the precondensate will not be completely deposited on the shell is minimized.
- Preferred prepolymers in the context of the invention are so-called amine formaldehyde precondensates (AFP). These form in a preferred embodiment the Material which by polycondensation finally forms the shell or wall of the capsule and encloses the active ingredient.
- AFP amine formaldehyde precondensates
- the amine component of the AFP is usually urea or in particular melamine.
- the preferred AFP are therefore Alkyl michss cons of melamine with short-chain alcohols and in particular the so-called high or partially alkoxylated and possibly also alkylated melamine as offered in aqueous-methanol solution of formaldehyde under the name Luracoll ®, especially Luracoll ® SD by BASF become.
- the amine component of AFP is usually urea or especially melamine.
- the preferred AFP are therefore Alkyl mecanicss cons of melamine with short-chain alcohols and in particular the so-called high or partially alkoxylated and possibly also alkylated melamines, such as those offered in aqueous-methanol solution of formaldehyde under the name Luracoll ®, especially Luracoll ® SD by BASF.
- prepolymers optionally alkylated mono- and polymethylol-urea and mono- and polymethylol melamine precondensates, such as those sold under the name URAC (Cytec Corp.) or partially methylated mono and polymethylol-l, 3,5-triamino-2,4,6-triazine precondensates, which are commercially available under the name CYMEL (Cytec Corp.).
- mono- and polyalkylolbenzoguanamine or mono- and polyalkylol glycuril precondensates are also suitable. As far as these precondensates have alkyl groups, they are less reactive and can be stored for longer.
- the preferred precondensates include the polycondensates methylolmelamines and polymethylol-1- (3,5-dihydroxy-methylbenzyl) -3,5-triamino-2,4,6-triazine.
- Poly [N- (2,2-dimethoxy-1-hydroxy)] - polyamines such as di- [N- (2,2-dimethoxy-1-hydroxy)] urea, tri- [N - (2,2-dimethoxy-1-hydroxy)] melamine, tetra- [N- (2,2-dimethoxy-1-hydroxy)] glycouryl and di- [N- (2,2-dimethoxy) hydroxy)] benzoguanidine and mixtures thereof.
- prepolymers are dialdehydes and resorcinol.
- Aromas, fragrances or else biogenic principles are preferably suitable as active ingredients, as are:
- Typical examples of flavors which may be encapsulated within the meaning of the invention include: acetophenone, allyl capronate, alpha-ionone, beta-ionone, anisaldehyde, anisylacetate, anisylformate, benzaldehyde, benzothiazole, benzylacetate, benzylalcohol, benzylbenzoate , beta-ionone, butylbutyrate, butylcapronate, butylidenephthalide, carvone, camphene, caryophyllene, cineole, cinnamylacetate, citral, citronellol, citronellal, citronellylacetate, cyclohexylacetate, cymene, damascone, decalactone, dihydrocoumarin, dimethylanthranilate, dimethyl-anthranilate, dodecalactone , Ethoxyethyl acetate, ethy
- Extracts of natural raw materials such as essential oils, concretes, absolues, resines, resinoids, balsams, tinctures such.
- Hydrocarbons such as. 3-carene; a-pinene; beta pinene; alpha-terpinene; gamma-terpinene; p-cymene; bisabolene; camphene; caryophyllene; cedrene; farnesene; limonene; Longifoliums; myrcene; ocimene; valencene; (£, Z) -1,3,5-undecatriene;
- Aliphatic alcohols such as. Hexanol; octanol; 3-octanol; 2,6-dimethylheptanol; 2-methylheptanol, 2-methyl-octanol; (F) -2-hexenol; (£) - and (Z) -3-hexenol; l-octen-3-ol; Mixture of 3,4,5,6,6-pentamethyl-3/4-hepten-2-ol and 3,5,6,6-tetramethyl-4-methyleneheptan-2-ol; (F, Z) -2,6-Nonadienol; 3,7-dimethyl-7-methoxyoctane-2-ol; 9-decenol; 10-undecenol; 4-methyl-3-decen-5-ol;
- Aliphatic aldehydes and their acetals such as. Hexanal; heptanal; octanal; nonanal; decanal; undecanal; dodecanal; tridecanal; 2-methyloctanal; 2-methyl nonanal; (F) -2-hexenal; (Z) -4-heptenal; 2,6-dimethyl-5-heptenal; 10-undecenal; (F) -4-decenal; 2-dodecenal; 2,6,10-trimethyl-5,9-undecadienal; Heptanal diethyl; 1, 1-dimethoxy-2,2,5-trimethyl-4-hexene; citronellyloxyacetaldehyde;
- Aliphatic ketones and their oximes such as.
- Aliphatic sulfur-containing compounds such as. For example, 3-methylthiohexanol; 3-methylthiohexyl acetate; 3-mercaptohexanol; 3-mercaptohexyl acetate; 3-mercaptohexyl butyrate; 3-acetylthiohexyl acetate; l-menthene-8-thiol;
- Aliphatic nitriles such as. B. 2-nonenitrile; 2-Tridecen Textrenitril; 2,12-tri- decenoic acid nitrile; 3,7-dimethyl-2,6-octadien Acid nitrile; 3,7-dimethyl-6-octen Acid nitrile;
- Aliphatic carboxylic acids and their esters such as. B. ( ⁇ ) and (Z) -3-hexenylformate; ethylacetoacetate; isoamyl; hexyl acetate; 3,5,5-trimethylhexyl acetate; 3-methyl-2-butenyl acetate; (F) -2-hexenyl acetate; (£) - and (Z) -3-hexenylacetate; octyl acetate; 3-octyl acetate; l-octen-3-yl acetate; ethyl butyrate; butyl butyrate; isoamyl; hexyl butyrate; (£) - and (Z) -3-hexenyl isobutyrate; hexyl crotonate; Ethylisovalerianat; Ethyl 2-methylpentanoate; Ethylhexanoate; allyl he
- Acyclic terpene alcohols such as. Citronellol; geraniol; nerol; linalool; Lavadulol; nerolidol; farnesol; tetrahydrolinalool; tetrahydrogeraniol; 2,6-dimethyl-7-octene-2-ol; 2,6-dimethyloctan-2-ol; 2-methyl-6-methylene-7-octen-2-ol; 2,6-dimethyl-5,7-octadiene-2-ol; 2,6-dimethyl-3,5-octadien-2-ol; 3,7-dimethyl-4,6-octadiene-3-ol; 3,7-dimethyl-l, 5,7-octatriene-3- oil; 2,6-dimethyl-2,5,7-octatriene-l-ol; as well as their formates, acetates, propionates, isobutyrates, but
- Acyclic terpene aldehydes and ketones such as. B. Geranial; neral; citronellal; 7-hydroxy-3,7-dimethyloctanal; 7-methoxy-3,7-dimethyloctanal; 2,6,10-trimethyl-9-undecenal; geranyl acetone; and the dimethyl and diethyl acetals of geranial, neral, 7-hydroxy-3,7-dimethyloctanal;
- Cyclic terpene alcohols such as. Menthol; isopulegol; a-terpineol; Terpinenol-4; Menthane-8-ol; Menthane-l-ol; Menthane-7-ol; borneol; soborneol; linalool; monopoly; cedrol; ambrinol; Vetyverol; guaiol; as well as their formates, acetates, propionates, isobutyrates, butyrates, isovalerates, pentanoates, hexanoates, crotonates, tiglinates, 3-methyl-2-butenoates;
- Cyclic terpene aldehydes and ketones such as. Eg menthone; menthone; 8-mercaptomenthan-3-one; carvone; camphor; fenchon; a-ionone; beta -lonone; a-n-methylionone; beta -n-methyl ionone; a-isomethyl ionone; beta-isomethylionone; a-lron; Damascon; beta damascone; beta -demascenone; ?
- Cyclic alcohols such as. B. 4-t / t-butylcyclohexanol; 3,3,5-trimethylcyclohexanol; 3-lsocamphylcyclohexanol; 2,6,9-trimethyl- (Z2, Z5, £ 9) -cyclododecatrien-l-ol; 2-isobutyl-4-methyltetrahydro-2 / - / - pyran-4-ol; from the group of cycloaliphatic alcohols such.
- B. a 3,3-trimethylcyclohexylmethanol; 2-methyl-4- (2,2,3-trimethyl-3-cyclopent-l-yl) butanol;
- Cyclic and cycloaliphatic ethers such as. Cineol; cedryl methyl ether; Cyclododecyl methyl ether; (Ethoxymethoxy) cyclododecane; a-Cedrenepoxid; 3a, 6,6,9a-tetramethyldodecahydronaphtho [2, 1-b] furan; 3a-ethyl-6,6,9a-trimethyl-dodecahydronaphtho [2, l-b] furan; l, 5,9-trimethyl-13-oxabicyclo [10.1.0] trideca-4,8-diene; rose oxide; 2- (2,4-dimethyl-3-cyclohexene-1-yl) -5-methyl-5- (1-methylpropyl) -1,3-dioxane;
- Cyclic ketones such as. 4-t / t-butylcyclohexanone; 2,2,5-trimethyl-5-pentylcyclopentanone; 2-heptylcyclopentanone; 2-pentylcyclopentanone; 2-hydroxy-3-methyl-2-cyclopenten-1-one; 3-methyl-cis-2-penten-l-yl-2-cyclopenten-l-one; 3-methyl-2-pentyl-2-cyclopenten-1-one; 3-methyl-4-cyclopentadecenone; 3-methyl-5-cyclopentadecenone; 3-methylcyclopentadecanone; 4- (l-ethoxyvinyl) -3,3,5,5-tetramethylcyclohexanone; tert-pentylcyclohexanone; 5-cyclohexadecen-l-one; 6,7-dihydro-1,1,2,3,3-pentamethyl-4 (5/ - /) - indanone; 9-cycloheptade
- Cycloaliphatic aldehydes such as. B. 2,4-dimethyl-3-cyclohexene carbaldehyde; 2-methyl-4- (2,2,6-trimethylcyclohexen-1-yl) -2-butenoyl; 4- (4-hydroxy-4-methylpentyl) -3-cyclohexene carbaldehyde; 4- (4-methyl-3-penten-l-yl) -3-cyclohexene carbaldehyde; Cycloaliphatic ketones, such as. B.
- Esters of cyclic alcohols such as. B. 2-ethyl-butylcyclohexyl acetate; 4-t / t-butylcyclohexyl acetate; 2-ieri-pentylcyclohexyl acetate; 4-ieri-pentylcyclohexyl acetate; Decahydro-2-naphthyl acetate; 3-pentyltetrahydro-2 / - / - pyran-4-yl acetate; Decahydro-2,5,5,8a-tetramethyl-2-naphthyl acetate; 4,7-Methano-3a, 4,5,6,7,7a-hexahydro-5- or -6-indenyl acetate; 4,7-methano-3a, 4,5,6,7,7a-hexahydro-5- or -6-indenylpropionate; 4,7-methano-3a, 4,5,6,7,7a-he
- Esters of cycloaliphatic carboxylic acids such as. For example, allyl-3-cyclohexylpropionate; Allylcyclohexyloxyacetate; methyldihydrojasmonate; methyl jasmonate; Methyl 2-hexyl-3-oxocyclopentanecarboxylate; Ethyl 2-ethyl-6,6-dimethyl-2-cyclohexenecarboxylate; Ethyl 2,3,6,6-tetramethyl-2-cyclohexene carboxylate; Ethyl-2-methyl-l, 3-dioxolan-2-acetate;
- Aromatic hydrocarbons such as. Styrene and diphenylmethane
- Araliphatic alcohols such as. B. benzyl alcohol; 1-phenylethyl; 2-phenylethyl alcohol; 3-phenylpropanol; 2-phenylpropanol; 2-phenoxyethanol; 2,2-dimethyl-
- Esters of araliphatic alcohols and aliphatic carboxylic acids such as. B.
- benzyl acetate benzylpropionate; benzyl isobutyrate; Benzylisovalerianat; 2-phenylethyl acetate;
- Araliphatic ethers such as. B. 2-phenylethyl methyl ether; 2-phenylethyl isoamyl ether; 2-Phenylethyl-l-ethoxyethyl ether; phenylacetaldehyde; Phenylacetaldehyde diethyl acetal; Hydratropaaldehyd dimethyl; Phenylacetaldehyde glycerinacetal; 2,4,6-trimethyl-4-phenyl-l, 3-dioxane; 4,4a, 5,9b-tetrahydroindeno [l, 2-d] -m-dioxin; 4,4a, 5,9b-tetrahydro-2,4-dimethylindeno [l, 2-d] -m-dioxin;
- Aromatic and araliphatic aldehydes such as. B. benzaldehyde; Phenylacetaldehyde; 3-phenylpropanal; Hydratropaaldehyd; 4-methylbenzaldehyde; 4-methylphenylacetaldehyde; 3- (4-ethylphenyl) -2,2-dimethylpropanal; 2-methyl-3- (4-isopropylphenyl) propanal; 2-methyl-3- (4-ieri-butylphenyl) propanal; 3- (4-te / t-butylphenyl) propanal; cinnamic aldehyde; a-Butylzimtaldehyd; a-amyl cinnamic aldehyde; a-hexyl cinnamic aldehyde; 3-methyl-5-phenylpentanal; 4-methoxybenzaldehyde; 4-Hydroxy-3-methoxybenzal
- Aromatic and araliphatic ketones such as. Acetophenone; 4-methylacetophenone; 4-methoxyacetophenone; 4-te / t-butyl-2,6-dimethylacetophenone; 4-phenyl-2-butanone; 4- (4-hydroxyphenyl) -2-butanone; l- (2-naphthalenyl) ethanone; benzophenone; 1,1,2,3,3,6-hexamethyl-5-indanyl methyl ketone; 6-tert-butyl-l, l-dimethyl-4-indanylmethyl- ketone; l- [2,3-dihydro-l, l, 2,6-tetramethyl-3- (1-methylethyl) -lH-5-indenyl] ethanone 5 ', 6', 7 ', 8'-tetrahydro-3'8'-hexamethyl-2-acetonaphthone, 5 ', 5', 6 ',
- Aromatic and araliphatic carboxylic acids and their esters such as.
- Nitrogen-containing aromatic compounds such as. B. 2,4,6-trinitro-1, 3-dimethyl-5-tert-butylbenzene; 3,5-dinitro-2,6-dimethyl-4-te / t-butylacetophenone; cinnamic acid; 5-phenyl-3-methyl-2-pentenoic acid nitrile; 5-phenyl-3-methylpentanklarenitril; Methylanthranilate; Methyl N-methylanthranilate; Schiff bases of methyl anthranilate with 7-hydroxy-3,7-dimethyloctanal, 2-methyl-3- (4-ethyl-butylphenyl) propanal or 2,4-dimethyl-3-cyclohexene carbaldehyde; 6-lsopropylchinolin; 6-lsobutylchinolin; 6-sec-butylquinoline; indole; skatol; 2-methoxy-3-isopropylpyrazine; 2-
- Phenols, phenyl ethers and phenyl esters such as. Eg estragole; anethole; eugenol; Ethylenyl methyl ether; isoeugenol; Isöugenylmethylether; thymol; carvacrol; diphenyl ether; beta-naphthyl methyl ether; beta-naphthylethyl ether; beta-naphthyl isobutyl ether; 1,4-dimethoxybenzene; Eugenylacetat; 2-methoxy-4-methyl phenol; 2-ethoxy-5- (1-propenyl) phenol; p-Kresylphenylacetat; from the group of heterocyclic compounds such.
- Lactones such as. B. 1,4-octanolide; 3-methyl-l, 4-octanolide; 1,4-nonanolide; 1,4-decanolide; 8-decen-l, 4-olide; 1,4-undecanolide; 1,4-dodecanolide; 1,5-decanolide; 1,5-dodecanolide; 1.15 pentadecanolide; cis and trans-ll-pentadecene-1,15-olide; cis- and trans-12-pentadecene-1, 15-olide; 1,16-hexadecanolide; 9-hexadecene-l, 16-olide; 10-oxa-l, 16-hexadecanolide; ll-oxa-l, 16-hexadecanolide; 12-oxa-l, 16-hexadecanolide; Ethylene 1,12-dodecanedioate; Ethylene-l,
- Biogenic principles are to be understood as meaning active substances having biological activity, for example tocopherol, tocopherol acetate, tocopherol palmitate, ascorbic acid, carnotine, carnosine, caffeine, (deoxy) ribonucleic acid and their fragmentation products, ⁇ -glucans, retinol, bisabolol, allantoin, phytantriol, panthenol , AHA acids, amino acids, ceramides, pseudoceramides, essential oils, plant extracts, as well as vitamin complexes.
- active substances having biological activity for example tocopherol, tocopherol acetate, tocopherol palmitate, ascorbic acid, carnotine, carnosine, caffeine, (deoxy) ribonucleic acid and their fragmentation products, ⁇ -glucans, retinol, bisabolol, allantoin, phytantriol, panthenol , AHA acids, amino acids, ceramides, pseudoceramides, essential oils,
- the 1,2-diols which according to the invention are used in the emulsion formation, stabilize the emulsion and thereby promote the formation of comparatively smaller droplets. and thus also corresponding microcapsules and are similar in their behavior protective colloids.
- the 1,2-diols may be 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, 1,2-decanediol, 1,2-dodecanediol and any mixtures of two or three or several of these substances.
- a mixture of 1,2-hexanediol and 1,2-octanediol is used (SymDeo ® 68, Symrise AG);
- one or both components can be completely or partially be replaced by 1,2-pentanediol (hydro Lite ® 5).
- the diols are preferably added to the emulsions in an amount of about 1 to about 10% by weight, preferably about 2 to about 5% by weight, based in each case on the emulsion.
- emulsifiers preferably W / O emulsifiers, are required which allow a homogeneous distribution of the oil droplets in the aqueous phase.
- Suitable emulsifiers are nonionic surfactants from at least one of the following groups:
- alkyl and / or alkenyl oligoglycosides having 8 to 22 carbon atoms in the alk (en) yl radical and their ethoxylated analogs;
- Adducts of 1 to 15 moles of ethylene oxide with castor oil and / or hydrogenated castor oil Adducts of 1 to 15 moles of ethylene oxide with castor oil and / or hydrogenated castor oil;
- Adducts of 15 to 60 moles of ethylene oxide with castor oil and / or hydrogenated castor oil Adducts of 15 to 60 moles of ethylene oxide with castor oil and / or hydrogenated castor oil;
- Partial esters of polyglycerol (average intrinsic condensation degree 2 to 8), polyethylene glycol (molecular weight 400 to 5000), trimethylolpropane, pentaerythritol, sugar alcohols (eg sorbitol), alkylglucosides (eg methylglucoside, butylglucoside, laurylglucoside) and polyglucosides (eg cellulose) saturated and / or unsaturated, linear or branched fatty acids having 12 to 22 carbon atoms and / or hydroxycarboxylic acids having 3 to 18 carbon atoms and their adducts with 1 to 30 moles of ethylene oxide;
- Block copolymers e.g. Polyethylene glycol-30 dipolyhydroxystearates
- polymeric emulsifiers such as Pemulen grades (TR-L, TR-2) from Goodrich or Cosmedia SP ® Cognis;
- Alkoxylates The addition products of ethylene oxide and / or of propylene oxide to fatty alcohols, fatty acids, alkylphenols or castor oil are known, commercially available products. These are mixtures of homologues whose average alkoxylation degree is the ratio of the molar amounts of ethylene oxide and / or propylene oxide and Substrate, with which the addition reaction is carried out corresponds. Ci 2 / I8 fatty acid mono- and diesters of addition products of ethylene oxide onto glycerol are known as refatting agents for cosmetic preparations.
- Alkyl and / or alkenyl oligoglycoside Alkyl and / or alkenyl oligoglycosides, their preparation and their use are known from the prior art. They are prepared in particular by reacting glucose or oligosaccharides with primary alcohols having 8 to 18 carbon atoms. With regard to the glycoside radical, both monoglycosides in which a cyclic sugar residue is glycosidically linked to the fatty alcohol and oligomeric glycosides having a degree of oligomerization of preferably approximately 8 are suitable. The degree of oligomerization is a statistical mean, which is based on a homolog distribution typical for such technical products.
- Partial glycerides Typical examples of suitable partial glycerides are Hydroxystea- rinkladremonoglycerid, hydroxystearic acid diglyceride, isostearic acid, Isostea- rinklarediglycerid, klarediglycerid oleic acid monoglyceride, oleic acid diglyceride, Ricinolklaremoglycerid, ricinoleic, Linolklaremonoglycerid, Linolklarediglycerid, Linolenkladoglycerid, Linolenklad, Erucaklaklamonoglycerid, Erucaklarediglycerid, Weinklaremonogly- cerid, Weinklarediglycerid, Citronenklamonoglycerid, Citronendiglycerid, Citronendiglycerid, Malic acid monoglyceride, malic acid diglyceride and their technical mixtures which, subordinated to the production process,
- Sorbitan esters As sorbitan esters sorbitan, sorbitan sesquiisostearat, sorbitan diisostearate, sorbitan triisostearate, sorbitan, sorbitan sesquioleate, sorbitan dioleate, trioleate, Sorbitanmonoerucat, Sorbitansesquierucat, Sorbitandierucat, Sorbitantrierucat, Sorbitanmonoricinoleat, Sorbitansesquiricinoleat, bitandiricinoleat sorting, Sorbitantriricinoleat, Sorbitanmonohydroxystearat, sorbitan sesquihydroxystearat , Sorbitan dihydroxystearate, sorbitan trihydroxystearate, sorbitan mono- tartrate, sorbitan sesqui tartrate, sorbitan ditartrate, sorbitan tri- tartrate, sorbitan monocitrate, sorbitan mono- bitanses
- Polyglycerol ester Typical examples of suitable polyglycerol esters are polyglyceryl-2 dipolyhydroxystearates (Dehymuls® PGPH), polyglycerol-3-diisostearates (Lameform® TGI), polyglyceryl-4 isostearates (Isolan® Gl 34), polyglyceryl-3 oleates, diisostearoyl polyglyceryl-3 diisostearates (Isolan® PDI), Polyglyceryl-3 Methylglucose Distearate (Tego Care® 450), Polyglyceryl-3 Beeswax (Cera Bellina®), Polyglyceryl-4 Caprate (Polyglycerol Caprate T2010 / 90), Polyglyceryl-3 Cetyl Ether (Chimexane® NL) , Polyglyceryl-3 Distearate (Cromophor® GS 32) and Polyglyceryl Polyricinoleate (Admul® WOL 140
- polyol esters examples include the mono-, di- and triesters of trimethylolpropane or pentaerythritol with lauric acid, coconut fatty acid, tallow fatty acid, palmitic acid, stearic acid, oleic acid, behenic acid and the like, which are optionally reacted with from 1 to 30 mol of ethylene oxide.
- Anionic emulsifiers are aliphatic fatty acids having 12 to 22 carbon atoms, such as palmitic acid, stearic acid or behenic acid, and dicarboxylic acids having 12 to 22 carbon atoms, such as azelaic acid or sebacic acid.
- zwitterionic surfactants are those surface-active compounds which carry at least one quaternary ammonium group and at least one carboxylate and one sulfonate group in the molecule.
- Particularly suitable zwitterionic surfactants are the so-called betaines such as the N-alkyl-N, N-dimethylammoniumglycinate, for example Kokosalkyldimethylammoniumglycinat, N-acylaminopropyl-N, N-dimethylammoniumglycinate, for example Kokosacyl- aminopropyldimethyl-ammoniumglycinat, and 2-alkyl-3-carboxylmethyl 3-hydroxyethylimidazolines having in each case 8 to 18 C atoms in the alkyl or acyl group, and the cocoacylaminoethylhydroxyethylcarboxymethylglycinate.
- betaines such as the N-alkyl-N, N-dimethylammoniumglycinate, for example Kokosalkyldimethylammoniumglycinat, N-acylaminopropyl-N, N-dimethylammoniumglycinate, for example Kokos
- fatty acid amide derivative known by the CTFA name Cocamidopropyl Betaine.
- emulsifiers are ampholytic surfactants.
- Ampholytic surfactants are surface-active compounds which, in addition to a C8 / i 8 alkyl or acyl group, contain at least one free amino group and at least one -COOH or -S0 3 H group and capable of forming inner salts.
- ampholytic surfactants are N-alkylglycines, N-alkylpropionic acids, N-alkylaminobutyric acids, N-alkyliminodipropionic acids, N-hydroxyethyl-N-alkylamidopropylglycines, N-alkyltaurines, N-alkylsarcosines, 2-alkylaminopropionic acids and alkylaminoacetic acids each having about 8 to 18 carbon atoms in the alkyl group .
- particularly preferred ampholytic surfactants are N-cocoalkylaminopropionate, cocoacylaminoethyl aminopropionate and Ci2 / i 8 acyl sarcosine.
- cationic surfactants are also suitable emulsifiers, those of the esterquat type, preferably methyl-quaternized difatty acid triethanolamine ester salts, being particularly preferred.
- the emulsifiers can be added in amounts of about 0.5 to about 10 wt .-%, and preferably about 1 to about 5 wt .-% - in each case based on the emulsion.
- the emulsions also contain stabilizers or protective colloids.
- Suitable examples include, in particular acrylic copolymers that have sulfonate groups, such as LUPASOL ® PA140 or LUPASOL VFR ® (BASF).
- copolymers of acrylamides and acrylic acid copolymers of alkyl acrylates and N-vinylpyrrolidone such as LUVISKOL ® K15, K30 or K90 (BASF);
- the preferred stabilizers are the above-mentioned representatives of LUPASOL ® - row, in particular in combination with the AFP LURACOLL ® type.
- the amount of stabilizers used may range from about 1 to about 10% by weight, and more preferably from about 2 to about 5% by weight, based on the emulsion.
- a characteristic of the method according to the invention is that the entire reaction sequence is carried out with vigorous stirring.
- an aqueous emulsion is first prepared which comprises the amine-formaldehyde precondensate, the active ingredient and the diol component and, if appropriate, emulsifiers and / or stabilizers. These components are mixed intensively, the proportion of water in the mixture being about 50 to 60% by weight, and the loading with the active ingredient, that is, for example, the perfume oil, being 30 to 40% by weight. Diols, emulsifiers and stabilizers are used in the amounts indicated above. The emulsion formation is carried out up to this point at room temperature or slightly elevated temperature (maximum 35 ° C) and under high shear.
- the polycondensation is triggered by a pH change.
- an acid for example formic acid or acetic acid
- a pH of about 1.0 to 4.0, preferably about 3.0 to 3.5 is set.
- the stirring power is reduced, for example, to about 600 to 900 rpm in order not to smash the capsules forming again immediately.
- the polycondensates settle on the finely divided oil droplets and begin to trap them. In the end, the emulsion has turned into a microcapsule dispersion.
- the still soft capsules must cure in the dispersion by crosslinking the constituents of the capsule shell. This is triggered by a change in temperature by gradually increasing it to 50 to 70 ° C. In addition, it is advisable to add further melamine to the solution, which can be incorporated into the shell and strengthen it.
- the dispersion may contain cleaved and unreacted formaldehyde, which is unacceptable for further use in contact with human skin.
- a formaldehyde scavenger for example an amine and in particular urea, is added to the dispersion.
- the aqueous dispersion may be dried, but it is customary to adjust it to an alkaline pH and to apply a thickening agent which a homogeneous distribution of the capsules in the dispersion supports and counteracts the sedimentation.
- Another object of the invention relates to the use of 1,2-diols are selected from the group formed on 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, 1,2-decanediol , 1,2-Dodecandiol and any mixtures of two, three or more of these substances as additives in the production of microcapsules and especially the use as additives for regulating the particle size in the production of microcapsules according to the above-described inventive method.
- the solution was gradually heated to 35 ° C and stirred at a speed of 850 rpm. Subsequently, 180 g of a water-insoluble perfume oil (TomCap) were added in portions via the dropping funnel until an O / W emulsion had formed. In order to initiate the polycondensation of the melamine-formaldehyde precondensate and the deposition of the polymer on the perfume oil droplets in the emulsion, 8 g of 10% strength by weight formic acid were added to the solution, resulting in a pH of 3.5. The solution was further stirred at the set temperature for about 30 minutes.
- TomCap water-insoluble perfume oil
- the microcapsules still provided with an elastic shell separated out and were dispersed in the aqueous phase by constant stirring.
- the components of the capsule shell were crosslinked. This was done by gradually raising the reaction temperature from 35 ° C to 60 ° C over a period of about 30 minutes, the stirring speed was thereby increased to 1,000 rpm.
- 33 g of a melamine dispersion was added, resulting in further solidification of the shell. Thereafter, the dispersion was stirred for a further 4 hours.
- 35 g of a 40 wt .-% aqueous urea solution was added to trap split-off formaldehyde and stirred for a further hour at a lower speed further.
- the resulting capsule dispersion was adjusted to a pH of about 8 with NaOH and stabilized by addition of a cationic polymeric thickener so that the capsules did not settle.
- the oil content of the capsules was 35.8% by weight.
- FIG. 4 shows a photomicrograph of the aqueous microcapsule dispersion
- Figure 5 shows the same dispersion, which was obtained without the addition of 1,2-diols. It can be seen that the dispersion according to the invention contains substantially smaller particles and less polymer grit.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Manufacturing Of Micro-Capsules (AREA)
- Fats And Perfumes (AREA)
- Cosmetics (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201780026167.7A CN109310974B (zh) | 2016-04-29 | 2017-04-22 | 用于制备微胶囊的方法 |
| JP2018556420A JP6901499B2 (ja) | 2016-04-29 | 2017-04-22 | マイクロカプセルの製造方法 |
| US16/097,007 US10835885B2 (en) | 2016-04-29 | 2017-04-22 | Method for producing microcapsules |
| BR112018071766-5A BR112018071766A2 (pt) | 2016-04-29 | 2017-04-22 | método para a produção de microcápsulas |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP16167763.8 | 2016-04-29 | ||
| EP16167763 | 2016-04-29 | ||
| EP16197703.8 | 2016-11-08 | ||
| EP16197703.8A EP3238816B1 (de) | 2016-04-29 | 2016-11-08 | Verfahren zur herstellung von mikrokapseln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2017186604A1 true WO2017186604A1 (de) | 2017-11-02 |
Family
ID=55910156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2017/059581 Ceased WO2017186604A1 (de) | 2016-04-29 | 2017-04-22 | Verfahren zur herstellung von mikrokapseln |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US10835885B2 (de) |
| EP (1) | EP3238816B1 (de) |
| JP (1) | JP6901499B2 (de) |
| CN (1) | CN109310974B (de) |
| BR (1) | BR112018071766A2 (de) |
| WO (1) | WO2017186604A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3092502A1 (fr) | 2019-02-12 | 2020-08-14 | Européenne D'application Des Cristaux Liquides | Formulation de microcapsules à membrane aminoplaste renforcée |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020164705A1 (de) | 2019-02-13 | 2020-08-20 | Symrise Ag | Verfahren zur herstellung von mikrokapseln |
| JP2022532256A (ja) | 2019-05-16 | 2022-07-13 | ジェム イノヴ | 生分解性マイクロカプセルの調製方法及びこの方法で得たマイクロカプセル |
| WO2021110273A1 (de) | 2019-12-05 | 2021-06-10 | Symrise Ag | Verkapselte riechstoffe auf natürlicher aminosäurebasis |
| EP4378575A1 (de) * | 2020-08-06 | 2024-06-05 | Symrise AG | Polyharnstoff/polyurethan-mikrokapseln |
| FR3116212B1 (fr) | 2020-11-18 | 2022-12-30 | Gem Innov | Procede de preparation de microcapsules biodegradables et microcapsules ainsi obtenues |
| CN113462221A (zh) * | 2021-07-02 | 2021-10-01 | 钱惠昌 | 用聚甘油-四葵酸酯制作多功能低粘度微胶囊涂料的方法 |
| US12593840B2 (en) | 2022-01-24 | 2026-04-07 | Optimally Balanced Corp. | Pesticidal or repellant composition and method of use |
| EP4499918A1 (de) | 2022-03-30 | 2025-02-05 | Symrise AG | Papierrolle als duftstoffkontrollabgabesystem |
| CN116098231B (zh) * | 2022-12-26 | 2025-06-03 | 福建森美达生物科技有限公司 | 一种饲料添加剂及其制备方法和使用方法 |
| CN121059437B (zh) * | 2025-11-07 | 2026-03-03 | 杭州纽龙日尚生物制品有限公司 | 一种活性成分微囊化组合物及其制备方法与应用 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2303866A1 (de) | 1972-01-26 | 1973-08-16 | Fuji Photo Film Co Ltd | Verfahren zur herstellung von mikrokapseln |
| EP2204155A1 (de) * | 2008-12-30 | 2010-07-07 | Takasago International Corporation | Duftstoffzusammensetzung für Kernhüllenmikrokapseln |
| EP2111214B1 (de) | 2007-02-13 | 2011-04-13 | Givaudan SA | Mikrokapseln |
| EP2669835A1 (de) | 2011-01-28 | 2013-12-04 | Ntt Docomo, Inc. | Tragbares informationsendgerät und verfahren zum speichern von greifmerkmalen dafür |
| EP2689835A1 (de) * | 2012-07-26 | 2014-01-29 | Papierfabrik August Koehler AG | Duftölverkapselung |
| EP2757146A1 (de) * | 2013-01-22 | 2014-07-23 | The Procter & Gamble Company | Behandlungsmittel enthaltend Mikrokapseln, primäre und sekundäre Amine und Formaldehydfänger |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120745C (zh) * | 1998-10-29 | 2003-09-10 | 株式会社成和化成 | 含有核心材料的微胶囊及其生产方法 |
| BRPI0812337A2 (pt) * | 2007-06-11 | 2015-01-27 | Appleton Paper Inc | Agente de benefício contendo partícula de liberação |
| CA2848388A1 (en) * | 2011-09-13 | 2013-03-21 | The Procter & Gamble Company | Encapsulates |
| JP5952382B2 (ja) * | 2012-02-24 | 2016-07-13 | 富士フイルム株式会社 | 水中油型エマルション組成物 |
-
2016
- 2016-11-08 EP EP16197703.8A patent/EP3238816B1/de active Active
-
2017
- 2017-04-22 BR BR112018071766-5A patent/BR112018071766A2/pt not_active Application Discontinuation
- 2017-04-22 JP JP2018556420A patent/JP6901499B2/ja active Active
- 2017-04-22 WO PCT/EP2017/059581 patent/WO2017186604A1/de not_active Ceased
- 2017-04-22 CN CN201780026167.7A patent/CN109310974B/zh active Active
- 2017-04-22 US US16/097,007 patent/US10835885B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2303866A1 (de) | 1972-01-26 | 1973-08-16 | Fuji Photo Film Co Ltd | Verfahren zur herstellung von mikrokapseln |
| EP2111214B1 (de) | 2007-02-13 | 2011-04-13 | Givaudan SA | Mikrokapseln |
| EP2204155A1 (de) * | 2008-12-30 | 2010-07-07 | Takasago International Corporation | Duftstoffzusammensetzung für Kernhüllenmikrokapseln |
| EP2669835A1 (de) | 2011-01-28 | 2013-12-04 | Ntt Docomo, Inc. | Tragbares informationsendgerät und verfahren zum speichern von greifmerkmalen dafür |
| EP2689835A1 (de) * | 2012-07-26 | 2014-01-29 | Papierfabrik August Koehler AG | Duftölverkapselung |
| EP2757146A1 (de) * | 2013-01-22 | 2014-07-23 | The Procter & Gamble Company | Behandlungsmittel enthaltend Mikrokapseln, primäre und sekundäre Amine und Formaldehydfänger |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3092502A1 (fr) | 2019-02-12 | 2020-08-14 | Européenne D'application Des Cristaux Liquides | Formulation de microcapsules à membrane aminoplaste renforcée |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3238816A1 (de) | 2017-11-01 |
| CN109310974B (zh) | 2022-07-19 |
| JP2019514675A (ja) | 2019-06-06 |
| EP3238816B1 (de) | 2019-10-09 |
| JP6901499B2 (ja) | 2021-07-14 |
| US20190134592A1 (en) | 2019-05-09 |
| US10835885B2 (en) | 2020-11-17 |
| BR112018071766A2 (pt) | 2019-02-19 |
| CN109310974A (zh) | 2019-02-05 |
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