EP1758550A2

EP1758550A2 - Cosmetic preparation containing a metallic pigment

Info

Publication number: EP1758550A2
Application number: EP05701155A
Authority: EP
Inventors: Peter Krüger; Hans-Jörg KREMITZL
Original assignee: Eckart GmbH
Current assignee: Eckart GmbH
Priority date: 2004-02-03
Filing date: 2005-01-25
Publication date: 2007-03-07
Also published as: WO2005074865A2; US20070172438A1; US7582285B2; JP4977476B2; WO2005074865A3; JP2007519761A; DE102004005366A1

Abstract

The invention relates to a cosmetic preparation containing a metallic effect pigment which consists of a metal substrate having a layer enclosing the substrate. Said layer is produced in a sol/gel method, has a barrier effect against sweat and saliva and prevents a direct contact between skin and metallic substrate, the metallic pigment being hydrophilic. The inventive preparation can be in the form of a cream, a lotion, an eye shadow, a nail varnish, a lipstick, a mascara, a gel, a make-up formulation or a self-tanning cream or lotion.

Description

Cosmetic preparation containing a metal pigment

The invention is directed to a cosmetic preparation containing a metal pigment. The cosmetic can be, for example, loose or pressed powder, eye shadows, lipsticks, eyeliner, nail polishes, blushes, hair dyes, mascaras, self-tanning liquids and the like.

Cosmetics of the type in question, such as loose or pressed powder, eyeshadow, lipsticks, eyeliner, nail polishes, blushes, hair colorants, mascaras, self-tanning liquids and the like are composed of a carrier material or a base formulation, and color and effect agents of various types the goal of achieving a certain color effect on skin, lips or hair or optically masking skin irregularities.

These coloring and effect agents can be dyes, lacquered organic dyes, inorganic or organic pigments and / or effect pigments, with effect pigments in particular in the case of effect pigments, depending on the viewing angle of the applied preparation, to achieve a different color impression or brightness impression. Pearlescent pigments in particular were conventionally used in the cosmetic field for this purpose.

Pearlescent pigments are based on platelet-shaped mica particles as a substrate, which are coated with metal oxides, primarily with titanium dioxide or iron oxide. Such pigments based on titanium oxide, however, are relatively transparent due to their composition and generally only show a color impression in the so-called “gloss angle”, while pigments based on iron oxide have a more opaque effect, but here the angle-dependent color or brightness impression is pushed into the background. The advantage of these pigments lies in their high chemical and thermal stability, which almost exclude negative influences on a binding agent, for example, and their good skin tolerance.

Insofar as metallic effect pigments have hitherto been used for cosmetic purposes, they have the advantage that they are opaque, rich in color and highly brilliant, but in particular they have the disadvantage that they do not always meet the hygienic and application-specific requirements, which must be taken into account above all that metal ions from the metal component, such as copper or zinc ions, are released into the carrier medium and can cause undesirable effects, such as gelation of binders and color changes. When applied, it can come into contact with sweat or saliva. H. with acidic or basic media, which can also cause an increased release of ions, which not only influence the carrier substance, but may also directly lead to health damage, such as skin irritation.

DE 44 37 753 A1 discloses a gloss pigment which can also be used for cosmetic purposes and which consists of at least five layers and is accordingly complex to produce.

DE 198 36 810 AI describes metal pigments which are coated in an aqueous medium, which is associated with the disadvantages described below. DE 101 14 445 AI and DE 101 14 446 AI describe iron pigments that are not approved for cosmetic applications. This applies accordingly to the iron pigment according to EP 0 673 980 A2, which is treated at an elevated temperature in an oxygen atmosphere.

US 6,398,861 B1 describes a metal pigment composition, not a metal pigment as such. Attention is drawn to an aqueous system and the use of surfactants is mentioned which are completely unsuitable for the solution according to the invention described below.

Proceeding from this, the object of the invention is to design a pigment of the type mentioned at the outset in such a way that it meets hygienic, health and application-specific requirements better than pigments used conventionally in the cosmetic field.

According to the invention, this object is achieved in that a metallic substrate has a layer which is produced by the sol-gel process and has a barrier effect against sweat and saliva and prevents direct contact between the skin and the metallic substrate and uniformly surrounds the substrate.

In such a sol-gel process is in organic solution or suspension from suitable monomeric metal oxide precursors, eg. As alkoxysilanes, using a suitable catalyst built up a barrier layer around the metallic substrate. Compared to coating processes from aqueous solutions, e.g. B. with water glass, the advantage that no additional pretreatment for activating or degreasing the base coated with grinding aids Pigments is necessary and the layer obtained is not affected by other ions, such as. B. chlorides or sulfates, can be contaminated. In addition, a layer obtained in this way, since it was obtained from monomeric precursors, offers the advantage of a particularly uniform, dense and therefore high-quality optically imperceptible layer, which is also harmless from a health and hygienic point of view, as is particularly relevant for cosmetic use is.

A metal pigment designed in this way has no or a significantly reduced tendency to agglomeration or flocculation compared to a non-coated or coated in aqueous system metal pigment. The optical properties are not or not significantly influenced by the surrounding layer. This applies accordingly to the haptic properties.

The layer is preferably compatible with the binder / carrier material of a cosmetic preparation.

The layer preferably consists of SiO ₂ produced by the sol-gel process. Chemically similar surfaces can be found in numerous cosmetic compositions, such as. B. in the form of bentonites.

For the present invention, it should be particularly emphasized that the metal pigment is water-wettable, so that it can be incorporated excellently and homogeneously into a wide variety of cosmetic preparations.

The proportion of the metal pigment in the formulation is advantageously 0.2% to 10%, in particular 0.2% to 5%. In particular, the preparation can be in the form of a cream or a lotion. It is particularly advantageous that, in a suitable dosage, it gives the skin an even visual impression without changing its color. However, it can also be provided that the preparation compensates for or covers skin imperfections.

The preparation can also advantageously be in the form of a self-tanning cream or lotion.

In order to ensure that the preparation feels smooth in the application, it is necessary that the flaky pigments have a large ratio of diameter to thickness (aspect ratio) and a low surface roughness. This was achieved according to the invention in that the silicate particles forming the coating have an average diameter of <100 nm. It is particularly advantageous if these particles are so fine that they can no longer be resolved even when viewed under scanning electron microscopy.

Particularly favorable properties in terms of appearance and stability can also be achieved with a cosmetic preparation which is designed as a hair gel. Realization as nail polish is also possible.

The latter can be characterized in that it is based on nitrocellulose and u. a. can also contain benzotriazoles, which ensures the storage stability of metal-pigmented formulations even over long periods of time.

The invention is explained in more detail below on the basis of preferred exemplary embodiments: 1st embodiment: Rouge (hot poured)

INCI name trade name% w / w manufacturer

Phase 1

Silica Spheron P-1500 5 Presperse

Mica Azco Mica BC 26 Presperse 1020 WG

Red Iron Oxide Cosmetic Russet 5.9 Sun Chemicals C33-8075

Black Iron Oxide Cosmetic Black 0.1 Sun Chemicals C33-134

Copper (and) Silica Visionaire Lava 10 Eckart

Phase 2

Isoeicosan Permethyl 102A 44 Persperse

Carnauba Wax Carnauba # 1 Flake 3 Strahl & Pitsch

C12-C15 Alkyl Benzoate Tixogel FTN 6 SüdChemie

(and) Stearalkonium Rheologicals

Bentonite (and) propylene

Carbonate

Production method:

1. The first four components of phase 1 are homogenized in a mixer until a uniform distribution is achieved.

2. Then the Pigment Visionaire Lava is added and mixed in homogeneously.

3. The components of phase 2 are stirred together in a mixer and heated to 80 ° C to 85 ° C.

4. The pigment mixture from phase 1 is slowly stirred into phase 2.

5. Mix until homogenized.

6. Pour into pan-like molds at a temperature of 82 ° C. 2nd embodiment: primer (water in silicone)

INCI name trade name% w / w manufacturer

Phase A

Cyclopentasiloxanes Dow Corning 245 Fluid 3 Dow Corning

Cyclopentasiloxanes (and) Dow Corning 1501 10 Dow

Dimethiconol Fluid Corning

Titanium Dioxide (and) BTD-M 9.5 Kobo

methicone

Mica (and) Methicone GMS-MS2 3.68 Kobo

Iron Oxides Yellow (and) BX YO-MS2 1.45 Kobo

methicone

Iron Oxides Red (and) BXRO-MS2 0.78 Kobo

methicone

Iron Oxides Black (and) BXBO-MS2 0.2 Kobo

methicone

Phase B

Cyclopentasiloxanes (and) Dow Corning 5225C 10 Dow

PEG / PPG-18/18 Corning

Dimethicone

C30-45 Alkyl Methicone Dow Corning Cosmetic 3 Dow Wax AMS C30 Corning

Cyclopentasiloxanes Dow Corning 245 2 Dow Corning

Bronze powder (and) Visionaire Maize Gold 2 Eckart

silica

Phase C

Polysorbate 20 Tween 20 0.5 Uniqema

Preservative Uniphen P-23 0.3 Induchem

Sodium chloride 0.75

Deionized Water 52.84

Production method:

1. Grinding the pigments in phase A.

2. Add the first three components from phase B to phase A and melt the phases at 75 ° C. 3. Stir in Visionaire Maize Gold into the merged phases A and B.

4. Mix phase C together and heat to 70 ° C.

5. Slow addition of phase C to the mixture of phase A and B with homogenization.

6. Cool to room temperature in a paddle mixer.

3rd embodiment: Metallic styling gel

INCI name trade name% w / w manufacturer

Phase 1

Deionized Water 62.7

Acrylates / C10-30 Alkyl Ultrez 21 0.66 Noveon

Acrylate cross polymer

Aminopropanol dilutes AMP-95 1.33 Angus

1:10

Phase 2 propylene glycol

Phase 3

Polyquaternium-11 Gafquat 755N 4 ISP

Deionized Water 25

Aminopropanol dilutes AMP-95 0.02 Angus

1:10

Phenoxyethanol (and) Uniphen P-23 0.3 Induchem

Methylparaben (and)

Butyl paraben (and)

Ethyl paraben (and)

Propylparaben

Mica (and) Titanium Prestige Dazzling 2.5 Eckart

Dioxide Silver

Aluminum (and) Silica Visionaire Bright 2.5 Eckart Silver Sea

production:

1. Work the thickener into water.

2. Neutralize to pH 6.5 to 7 with AMP.

3. Mix in propylene glycol.

4. Mixing polyquaternium-11 into water to produce phase 3.

5. Neutralize phase 3 to pH 6.5 to 7.

6. Add phase 3 to the combined phases 1 and 2.

7. Mix in the preservative.

8. Mix in the pearlescent and metal pigments. 4th embodiment: moisturizer

INCI name% w / w

Phase 1

Cyclomethicone 72

Dimethicone 20

C12-C15 alkyl benzoate (and) stearalkonium 40

Bentonite (and) Propylene Carbonate

Cetyl Dimethicone Copolyol 4.8

Visionaire Bright Natural Gold 2

Phase 2

Deionized Water 252.5

Sodium chloride 1.5

Phenoxyethanol (and) methyl paraben (and) 1.2

Butyl paraben (and) propyl paraben

Production: 1. Mix and heat phase 1 to 78 ° C.

2. Mix and heat phase 2 to 78 ° C.

3. Add phase 2 to phase 1 with homogenization.

4. Cool to room temperature in a paddle mixer.

5th embodiment: bronze and pearlescent lipstick

INCI name trade name% w / w manufacturer

Phase 1

Carnauba Wax Carnauba # 1 Flake 3.0 Strahl & Pitsch

Beeswax Yellow Beeswax 2.5 Jet & Pitsch

Candelilla Wax SP-75 5 Strahl & Pitsch

Ozokerite Ozokerite 170 2 Koster Keunen

PTFE microslip 519 2 micro powders

Castor Oil Castor Oil USP 17.82 SüdChemie Rheologicals

Polyisobutene Permethyl 104A 7 Presperse

Isostearyl Isostearate Isostearate 5 Gattefosse d'Isostearyle

Isononyl Isononanoate Dermol 99 18 Alzo

Caprylic / Capric Liponate GC 10 Lipo

triglycerides

Phase 2

D&C Red # 27 Aluminum 33% dispersion in 10 Sun Chemicals

Lake Castor Oil

FD&C Blue # 1 Aluminum 50% dispersion in 0.03 Sun Chemicals

Lake Castor Oil

Phase 3

Propyl paraben 0.10

BHT 0.05 Eastman

Titanium dioxide (and) Mica Prestige Bright 7.5 Eckart

(and) Iron Oxide Fire Red Pearl

Bronze (and) Silica Visionaire Bright 7.5 Eckart Natural Gold

Boron Nitride Soft Touch 2.5 Advanced CC5102 Ceramics

Preparation: 1. Mix phase 1 in a low shear mixer. 2. Heating up to 80 ° C to 84 ° C. 3. Add phase 2 and mix until homogenized.

4. Add phase 3.

5. Pour into a lipstick mold at 70 ° C.

6th embodiment: bronze and pearlescent eyeshadow (pressed)

INCI name trade name% w / w manufacturer

Phase 1

Mica Azco Mica BC 34.9 Presperse 1020wg

Titanium Dioxide Tronox CR-837 5.5 Kerr McGee

Chromium Oxide Green Chromium Oxide 2.8 LCW Green

Iron Oxide Yellow Iron Oxide Yellow 1.8 Sun Chemical

Zinc Stearate Zinc Stearate SAK 5.5 USP 25p Blachford

Boron Nitride Soft touch CCS 102 1.8 Advanced Ceramic

Phase 2

Mica (and) Titanium Prestige Sparkling 18.35 Eckart

Dioxide (and) Iron Oxide Lemon Gold

Bronze (and) Silica Visionaire Bright 18.35 Eckart Natural Gold

Phase 3

Dimethicone Dow 200 5.5 Dow Corning

Caprylic / Capric Liponate GC 5.5 Lipo

triglycerides

production:

1. Mix the components of phase 1 in a mixer until homogeneity is achieved.

2. Add phase 2 and mix in homogeneously.

3. Spray phase 3 and mix in homogeneously.

7th embodiment: nail polish

Name% w / w manufacturer

1/4 second Parcell Ultra RS 19.2 Green Tree

nitrocellulose

1/2 second Parcell Ultra RS 2.7 Green Tree

nitrocellulose

Ethyl Acetate 32.1 n-Butyl Acetate 27.6

Isopropyl alcohol 6.8

Dibutyl phthalates 4.2

Camphor 1.4

Stearalkonium Bentonite 1.0 Süd Chemie Rheologicals

Visionaire® Cinnamon 5.0 Eckart

Production: Dispersing the stearalkonium bentonite in butyl acetate and activation with a mixture of 2: 1 isopropanol / H ₂ 0 with a proportion of 30 wt .-% stearalkonium bentonite. Add the solution to the rest of the components including any desired additional dyes to achieve special color combinations (except Visionaire® Cinnamon) and mix thoroughly. Add Visionaire® Cinnamon with minimal shear stress and mix in evenly.

8th embodiment: silver mascara

Name% w / w

Phase A

Deionized Water 43.40

Hydroxyethyl cellulose 0.30

Triethanolamine 1.50

Phase B

Visionaire Silver Sea 10.00

Spherical silica beads 3.00

Phase C

Stearic acid 4.00

GMS 1.50

PEG-100 stearate 1.00

Beeswax 5.00

Carnauba wax 3.00

Candellila wax 3.00

Phase D

Polyacrylic emulsion 5.00

Phase E

Phenoxyethanol 1.00

Methyl paraben 0.25

Ethyl paraben 0.30

Propyl paraben 0.15

Butyl paraben 0.10

9. Embodiment: self-tanning lotion

INCI name / description% w / w

Phase 1

Deionized Water 55,625 Sodium Chloride 0.375

Phase 2

C12-15 Alky Benzoate 10.00

Cyclomethicone 8.00

Dimethicone 5.00

Cyclomethicone (and) Quaternium-18 Hectorite (and) 10.00 Propylene Carbonate

Cetyl Dimethicone Copolyol 1.20

Phase 3

Visionaire Bright Natural Gold 0.50

Phase 4

Dihydroxyacetone 4.00 Deionized Water 5.00

Phase 5

Phenoxyethanol (and) methylparaben (and) butylparaben (and) 0.30 ethylparaben (and) propylparaben

Preparation: 1. Place deionized water in a stirred container, dissolve sodium chloride in it while stirring, warm to 75 ^S C.

2. Homogenize components of phase 2 and heat to 75 ° C.

3. Stir phase 3 into phase 2, keeping the temperature at 75 ° C.

4. Add phase 1 to the mixture of phases 2 and 3 and disperse homogeneously.

5. Transfer of the dispersion into a paddle mixer.

6. Slowly cool the mixture to 50 ° C while stirring.

7. Add premixed phase 4 and phase 5.

8. Cool to room temperature with even mixing. 9. Fill into suitable containers.

Claims

claims

1. Cosmetic preparation containing a metallic effect pigment, which consists of a metallic substrate with a sol-gel process, a barrier effect against sweat and saliva, having a direct contact between the human body and metallic substrate, the substrate surrounding layer, whereby the metal pigment is water wettable.

2. Cosmetic preparation according to claim 1, characterized in that it is in the form of a cream, a lotion, an eyeshadow, a nail polish, a lipstick, a mascara, a gel, a make-up formulation or a self-tanning cream or lotion.

3. Cosmetic preparation according to one of claims 1 or 2, characterized in that the layer surrounding the substrate consists of Si0 ₂ .

4. Cosmetic preparation according to one of claims 1 to 3, characterized in that it gives a uniform optical impression of the skin without changing its color.

5. Cosmetic preparation according to one of claims 1 to 4, characterized in that it compensates for skin imperfections or covers.

6. Cosmetic preparation according to one of claims 1 to 5, characterized in that it contains a proportion of 0.2% to 40%, preferably from 0.2% to 10% and particularly preferably from 0.2% to 5% metal pigment ,

7. Cosmetic preparation according to one of claims 1 to 6, characterized in that it is a nail polish.

8. Cosmetic preparation according to claim 7, characterized in that it is based on nitrocellulose.

9. Cosmetic preparation according to one of the preceding claims, characterized in that it additionally contains benzotriazoles.

10. Cosmetic preparation according to one of the preceding claims, characterized in that the silicate particles generating the coating of the metal pigment have an average diameter of <100 nm and the preparation accordingly feels smooth in application.