EP1526831A1

EP1526831A1 - Retinoid-containing preparations

Info

Publication number: EP1526831A1
Application number: EP03766186A
Authority: EP
Inventors: Axel Jentzsch; Andreas Habich; Christian KÖPSEL; Andreas Ernst
Original assignee: BASF SE
Current assignee: BASF SE
Priority date: 2002-07-24
Filing date: 2003-07-16
Publication date: 2005-05-04
Also published as: BR0311563A; CN100443070C; US20050202049A1; JP2006503000A; DE10233740A1; WO2004012696A1; CN1671353A; WO2004012696A8; AU2003246705A1

Abstract

Disclosed are preparations containing at least one retinoid, at least one water-soluble antioxidant, and at least one oil-soluble antioxidant. The invention is characterized by the fact that the preparations contain at least 1 part by weight of one or several water-soluble antioxidants and 0.1 to 100 parts by weight of one or several oil-soluble antioxidants per part by weight of retinoid, the content of one or several water-soluble antioxidants ranging between 0.05 and 0.8 percent by weight relative to the total quantity of the preparations.

Description

preparations containing etinoid

description

The present invention relates to retinoid-containing preparations, their production and use in cosmetics, pharmacy and in the food sector.

Retinoids are among the most active ingredients that are used in cosmetics and dermatology. They work among other things regulating normal cell growth and influencing the differentiation of epithelial cells. For example, retinoic acids are used to treat acne and retinol in anti-wrinkle creams.

However, the use of retinoids is severely restricted, which is due, among other things, to the high instability of the compounds. For this reason, strict precautionary measures must be observed when manufacturing preparations containing retinoids. For example, the production must take place completely under protective gas and the finished product must be packaged in an oxygen-impermeable manner.

These requirements require sophisticated technological equipment from the manufacturer and are therefore associated with high manufacturing costs.

A number of methods for stabilizing retinoids have been described. For example, EP-A-1 055 720 discloses the stabilization of oxygen-sensitive compounds by using thio compounds or glycoproteins in the absence of oxygen.

According to WO 93/00085 and EP-A-0 440 398, both water- and fat-soluble antioxidants are used together with chelating agents to stabilize retinoids.

However, the methods described do not always lead to adequate stabilization in the sense of the invention. Rather, both water-soluble antioxidants, in particular ascorbic acid, and fat-soluble antioxidants, in particular tocopherol, have a destabilizing effect in connection with retinoids in certain concentration ranges.

In addition, when using certain antioxidant combinations together with retinoids, there may be undesirable side effects, for example yellowish discoloration of the preparations come, which make the use of these systems in cosmetics or in the food sector unusable.

It was therefore an object of the present invention to provide retinoid-containing preparations which do not have the disadvantages mentioned above with regard to stability and discoloration and which are simple to prepare.

This object was achieved by preparations containing at least one retinoid, at least one water-soluble antioxidant and at least one oil-soluble antioxidant, characterized in that in the preparations, per part by weight of retinoid, at least 1 part by weight of one or more water-soluble antioxidants and 0.1 to 100 parts by weight of one or more Oil-soluble antioxidants are present, the content of one or more water-soluble antioxidants being in the range from 0.05 to 0.8% by weight, based on the total amount of the preparations.

The preparations according to the invention are cosmetic and dermatological or pharmaceutical preparations and also preparations for the food sector. Cosmetic preparations, in particular skin care preparations, are preferred.

An advantageous embodiment of the preparations according to the invention contains 1 to 100 parts by weight, preferably 1 to 20 parts by weight, particularly preferably 1 to 5 parts by weight, very particularly preferably 2 to 3 parts by weight of one or more water-soluble antioxidants and 1 to 20 parts by weight, preferably 3, per part by weight of retinoid up to 10 parts by weight, particularly preferably 5 to 10 parts by weight, very particularly preferably 8 to 10 parts by weight of one or more oil-soluble antioxidants.

In the context of the present invention, retinoids mean vitamin A alcohol (retinol) and its derivatives such as vitamin A aldehyde (retinal), vitamin A acid (retinoic acid) and vitamin A esters such as retinyl acetate and retinyl palmitate. The term retinoic acid encompasses both all-trans retinoic acid and 13-cis retinoic acid. The terms retinol and retinal preferably include the all-trans compounds. The preferred retinoid used for the preparations according to the invention is all-trans retinol.

The water-soluble antioxidants include ascorbic acid,

Sodium sulfite, sodium metabisulfite, sodium bisulfite, sodium thiosulfite, sodium formaldehyde sulfoxylate, isoascorbic acid, thiosulfite glycerol, thiosorbitol, thiourea, thioglycolic acid, cysteine hydrochloride, 1,4-diazobicyclo- (2,2,2) -octane or mixtures thereof.

Preferred water-soluble antioxidants are ascorbic acid (L-ascorbic acid) and isoascorbic acid (D-ascorbic acid), particularly preferably L-ascorbic acid.

The L-ascorbic acid used with particular preference can be the free acid but also its salts. ^Examples' games of salts of L-ascorbic acid are alkali metal or alkaline earth metal salts of L-ascorbic acid such as sodium L-ascorbate, potassium L-ascorbate or calcium L-ascorbate, as well as salts of L-ascorbic acid with an organic amine compound such as Choline ascorbate or L-carnitine ascorbate. Still more typically used ^'free L-ascorbic acid or sodium L-ascorbate. The same applies to the use of D-ascorbic acid.

Oil-soluble antioxidants, ascorbyl palmitate, butylated hydroxyanisole, ^■ α-tocopherol, phenyl-α-naphthylamine or mixtures include butylated hydroxytoluene (BHT), meant thereof.

The preferred oil-soluble antioxidant is α-tocopherol, which can be either (R, R, R) - or (all-rac) -α-tocopherol.

The preparations according to the invention generally contain 0.005 to 0.5% by weight, preferably 0.01 to 0.5% by weight, particularly preferably 0.03 to 0.15% by weight, very particularly preferably 0.04 up to 0.12% by weight of one or more retinoids, in particular all-trans-retinol, 0.05 to 0.8% by weight, preferably 0.1 to 0.5% by weight, particularly preferably 0.15 up to 0.3% by weight of one or more water-soluble antioxidants, in particular L-ascorbic acid, 0.0005 to 2% by weight, preferably 0.01 to 1.8% by weight, particularly preferably 0.1 to 1, 5 wt .-%, very particularly preferably 0.4 to 1.2 wt .-% of one or more oil-soluble antioxidants, in particular α-tocopherol.

The preparations of the invention are distinguished inter alia by the fact that can be omitted in their manufacture, bottling and storage of the use of inert ^gas' while ensuring a sufficient stability.

Sufficient stability in the sense of the invention is understood to mean that at least 90% of the retinoid is found in the preparation after 12 weeks of storage at 40 ° C. Further there are no undesirable color changes when the preparations according to the invention are stored.

It is advantageous if the preparations according to the invention are kept in oxygen-impermeable packaging.

The oxygen-impermeable packaging can be all commercially available packaging suitable for this purpose, e.g. Glass containers or aluminum packaging. Aluminum tubes are preferably used, particularly preferably those aluminum tubes whose inside is additionally provided with a protective lacquer.

The cosmetic as well as the dermatological or pharmaceutical preparations are generally based on a carrier which contains at least one oil phase. However, preparations on an aqueous basis alone are also possible. Accordingly, oils, creams, pastes or fat-free gels or preferably emulsions are suitable.

0 / W emulsions, W / O emulsions, microemulsions or multiple emulsions such as O / W / O emulsions or W / O / W emulsions with one or more of the retinoids according to the invention, present in dispersed form, come in as emulsions Question, the emulsions are obtainable for example by phase inversion technology, according to DE-A-197 26 121.

Typical cosmetic auxiliaries which can be considered as additives to the cosmetic or pharmaceutical preparations are, for example, co-emulsifiers, fats and waxes, stabilizers, thickeners, biogenic active ingredients, film formers, fragrances, dyes, pearlescent agents, preservatives, pigments, electrolytes (e.g. Magnesium sulfate) and pH regulators. Known W / O and, in addition, also O / W emulsifiers such as polyglycerol esters, sorbitan esters or partially esterified glycerides are preferred as co-emulsifiers. Typical examples of fats are glycerides; waxes include beeswax, paraffin wax or microwaxes, optionally in combination with hydrophilic waxes. Metal salts of fatty acids such as magnesium, aluminum and / or zinc stearate can be used as stabilizers. Suitable thickeners are, for example, crosslinked polyacrylic acids and their derivatives, polysaccharides, in particular xanthan gum, guar guar, agar agar, alginates and tyloses, carboxymethyl cellulose and hydroxyethyl cellulose, and also fatty alcohols, monoglycerides and fatty acids, polycrylates, polyvinyl alcohol and polyvinyl pyrrolidone. Plant extracts, protein hydrolyzates and vitamin complexes are among the biogenic active ingredients understand. Common film formers are, for example, hydrocolloids such as chitosan, microcrystalline chitosan or quaternized chitosan, polyvinylpyrrolidone, vinylpyrrolidone-vinyl acetate copolymers, polymers of the acrylic acid series, quaternary cellulose derivatives and similar compounds. Suitable preservatives are, for example, formaldehyde solution, p-hydroxybenzoate or sorbic acid. Suitable pearlizing agents are, for example, glycol distearic acid esters such as ethylene glycol distearate, but also fatty acids and fatty acid monoglycol esters. The dyes which can be used are those which are suitable and approved for cosmetic purposes, as compiled, for example, in the publication "Cosmetic Dyes" by the Dye Commission of the German Research Foundation, published by Verlag Chemie, Weinheim, 1984. These dyes are usually used in a concentration of 0.001 to 0.1% by weight, based on the mixture as a whole.

The use of other antioxidants is beneficial in many cases. Thus, in addition to the antioxidants according to the invention mentioned at the outset, all antioxidants suitable or customary for cosmetic and / or dermatological applications can be used.

The antioxidants are advantageously selected from the group consisting of amino acids (eg glycine, histidine, tyrosine, tryptophan) and their derivatives, imidazoles (eg urocanic acid) and their derivatives, peptides such as D, L-carnosine, D-carnosine, L-carnosine and their derivatives (e.g. anserine), carotenoids, carotenes (e.g. β-carotene, lycopene) and their derivatives, chlorogenic acid and their derivatives, lipoic acid and their derivatives (e.g. dihydroliponic acid), aurothioglucose, propylthipuracil and other thiols (e.g. ^" Thiorodoxin, glutathione, cystine, cystamine and their glycosyl, N-acetyl, methyl, ethyl, propyl, ayl, butyl, and lauryl, pal itoyl, oleyl, γ-linoleyl, cholesteryl - And glyceryl esters) as well as their salts, dilauryl thiodipropionate, distearyl thiodipropionate, thiodipropionic acid and its derivatives (esters, ethers, peptides, lipids, nucleotides, nucleosides and salts) as well as sulfoximine compounds (eg buthioninsulfoximines, homocysteine sulfoximines, pentane- hexane sulfate) - , Heptathioninsulfoximine) in very low tolerable doses (e.g. pmol to μmol / kg), also (metal) chelators (e.g. α-hydroxy fatty acids, palmitic acid, phytic acid, lactoferrin), α-hydroxy acids (e.g. citric acid, lactic acid, malic acid), humic acid, Bile acid, bile extracts, biliburin, biliverdin, EDTA and their derivatives, unsaturated fatty acids and their derivatives (eg γ-linolenic acid, linoleic acid, oleic acid), folic acid and its derivatives and coniferyl benzoate Benzoin, rutinic acid and its derivatives, α-glycosylrutin, ferulic acid, furfurylidene glucitol, carnosine, nordihydroguajak resin acid, nordihydrogua aretic acid, trihydroxybutyrophenone, uric acid and its derivatives, mannose and its derivatives, zinc and its derivatives, zinc and its derivatives (eg, ZnO ₄ ) and selenium ( ₄ ) its derivatives (eg selenium methionine), stilbenes and their derivatives (eg stilbene oxide, trans-stilbene oxide).

The total amount of the aforementioned antioxidants (one or more compounds) in the preparations is preferably 0.075 to 30% by weight, particularly preferably 0.1 to 20% by weight, in particular 0.55 to 10% by weight, based on the Total weight of the preparation.

Typical oil components in cosmetics are, for example, paraffin oil, glyceryl stearate, isopropyl myristate, diisopropyl adipate, 2-ethylhexanoic acid cetyl stearyl ester, hydrogenated polyisobutene, petrolatum, caprylic acid / capric acid triglycerides, microcrystalline wax, lanolin and stearic acid.

The preparations according to the invention are suitable inter alia. as an additive for food, for example for the vitaminization of beverages and for the production of nutritional supplements in the human and animal sector.

In principle, all of the above-mentioned types of formulation are suitable for the use of the retinoid-containing preparations according to the invention in foods. For example, emulsions, solubilisates or water-dispersible dry powders, in which mixtures of at least one retinoid, at least one water-soluble antioxidant and at least one oil-soluble antioxidant are present, can be used to vitaminize beverages.

However, it is also possible to add emulsions which contain the retinoid-containing preparations according to the invention, milk products such as yogurt, milk mix drinks or milk ice cream.

The invention also relates to food supplements, animal feed, foodstuffs and pharmaceutical and cosmetic preparations containing the retinoid-containing preparations according to the invention. Dietary supplements and pharmaceutical preparations which contain the retinoid mixture according to the invention include _. To understand tablets, coated tablets and hard and soft gelatin capsules.

manufacturing:

There are numerous options for producing a cosmetic preparation. Thus come the hot / hot process, the hot / cold process or the cold / cold process, as described, for example, in "Cosmetics - Development, Production and Use of Cosmetic Agents", ed. Wilfried Umbach, Thieme Verlag, 1995, Page 511 are described for use. These processes can be used to produce oil-in-water (0 / W-), water-in-oil (W / 0-), but also multiple emulsions as well as cream gels and gels. The active ingredients are preferably incorporated after the formulation has cooled to below 40 ° C., in particularly sensitive cases preferably after cooling to room temperature. For the studies on which this invention is based, a 0 / W emulsion was produced in a hot / hot process and the active ingredients were then incorporated into the finished formulation at room temperature.

The recipe used:

Ingredient INCI

Phase A 2.00 Cremophor A 6 ceteareth-β, stearyl alcohol

2.00 Cre ophor A 25 Ceteareth-25

3.00 Jojoba Oil Simmondsia Chinensis (Jojoba) Seed Oil

3.00 Cetylstearyl Alcohol Cetearyl Alcohol

10.00 paraffin oil, viscous mineral oil

5.00 petrolatum petrolatum

4.00 Miglyol 812 Caprylic / Capric Triglyceride

0.10 BHT BHT Phase B 5.00 1, 2-propylene glycol Propylene Glycol USP

0.10 Edeta BD Disodium EDTA

8:00 pm Carbopol 934, Carbomer

1% in water.

0.30 Chemag 2000 ad 100 Water dem. Aqua dem.

Phase C 0.80 sodium hydroxide, sodium hydroxide

10% in water.

Phase D 0.50 Vitamin E Acetate Tocopheryl Acetate

0.20 phenoxyethanol phenoxyethanol q.s. Perfume oil manufacture:

Phases A and B were heated separately to approx. 80 ° C. Phase B was then stirred into phase A and homogenized. Phase C was neutralized and post-homogenized. The cream was cooled to about 40 ° C. with stirring, phase D was stirred in and homogenized again.

The water-soluble and the oil-soluble antioxidants were then incorporated into the finished emulsion after the cream had cooled to room temperature. Initially D, L-alpha-tocopherol was added, then the ascorbic acid and then retinol (Retinol 15D ^®, BASF; 15% solution of retinol in a medium chain triglyceride) is incorporated with stirring.

The cream was then filled into aluminum tubes with an internal protective varnish.

According to the manufacturing process described above, creams with different amounts of retinol, (all-rac) -α-tocopherol and L-ascorbic acid were produced and for stability studies

Stored at 40 ° C for 12 weeks. The result of this stability test can be found in the following table: The subject matter of the invention is explained in more detail using the following example formulations.

example 1

Skin lotion (O / W emulsion)

% W / w ceteareth-6 and stearyl alcohol 2.50

Ceteareth-25 2.50

Hydrogenated cocoglyceride 1.50

PEG-40 dodecyl glycol copolymer 3.00

Dirnethicone 3.00 Phenethyl Dimethicone 2.00

Cyclomethicone 1.00

Cetearyl octanoate 5.00

Avocado oil 1.00

Almond oil 2.00 germ oil 0.80

Panthenol USP 1.00

Phytantriol 0.20

Vitamin E acetate 0.30

Propylene Glyco1 5.00 Perfume q.s.

Preservatives q.s.

Ascorbic acid 0.20

Retinol 15D ^® 0.20

Tocopherol 0.10 water ad 100

Example 2

Hand cream (w / o emulsion)

% W / W

Cetearyl alcohol 1.00

Glyceryl stearate 1.50

Stearyl alcohol 1.50

Cetyl palmitate 2.00

Vitamin E acetate 0.50

Dimethicone 8.00

Ceteareth-6 and stearyl alcohol 3.00

Octyl methoxycinnamate 5.00

Propylene glycol 8.00

Panthenol 1.00

Evening primrose oil 3.00 PEG-7 hydrogenated castor oil 6.00 glycery1o1eat 1.00 phenethyl dimethicone 3.00 beeswax 1.50 locust bean gum 0.80 silk powder 0.80 preservative qs perfume, qs borax 0.10 sodium ascorbate 0.30 tocopherol 0.60 retinol 15D, ® 0.66 water ad 100

Example 3

Sun protection lotion (W / O emulsion)

% W / W PEG-7 hydrogenated castor oil 6.00

PEG-40 hydrogenated castor oil 0.50

Isopropyl palmitate 7.00

PEG-45 / Dodecyl Glycol Coplymer 2.00

Jojoba oil 3.00 magnesium stearate 0.60

Octyl methoxycinna ate 8.00

C 12-15 alkyl benzoate 5.00

Titanium dioxide 4.00

Propylene glycol 5.00 EDTA 0.20

Preservatives q. s.

Retinol 15D ^® 0.33

Water ad 100

Sodium ascorbyl phosphate 1.00 vitamin E acetate 0.50

Sodium ascorbate 0.20

Tocopherol 1.00

Perfume qs Example 4

Multiple emulsion (W / O / W emulsion)

% W / W

Paraffin oil 7.50

Cetearyl octanoate 2.50

Aluminum stearate 0.25

Magnesium stearate 0.25 microcrystalline wax H 0.50

Cetearyl alcohol 1.00

Lanolin alcohol 1.50

Wool wax alcohol ointment 1.50

PEG-7 hydrogenated castor oil 0.75 PEG-45 / dodecyl glycol copolymer 2.00

Ceteareth-6 and stearyl alcohol 2.00

Ceteareth-25 2.00

Trilauret-4 phosphate 1.00

Hydroxyethyl cellulose 0.20 propylene glycol 7.50

Magnesium sulfate 0.25

Ascorbic acid 0.30

Tocopherol 0.01

Retinol 15D -. ^e es) 0.40 water ad 100

Example 5

microemulsion

% W / W

Ceteareth-25 13.00

PEG-7 glyceryl cocoate 20.00

Octyldodecanol 5.00 preservative q.s.

Ascorbic acid 0.10

Tocopherol 0.10

Retinol 15D -, ⁵ ® 0.66

Water ad 100 Example 6

Liposome gel (hydrophilic gel)

% W / W

PEG-40 hydrogenated castor oil 1.00

Bisabolol rac. 0.10

Propylene glycol 8.00

Panthenoi 0.50

Water, Vitamim E-Acetate, Polysorbate 80 and Caprylic / Capric

Triglycerides and lecithin 3.00

Preservatives q.s.

Perfume q.s.

Carbomer 0.50

Ascorbic acid 0.15

Tocopherol 0.15

Triethanolamine 0.70

Retinol 15D ^® 0.33 water ad 100

Example 7

Cooling Body Splash (water-based cosmetics)

% W / W

PEG-40 hydrogenated castor oil 2.00

Menthyllac at 0.20

Alcohol 5.00 PEG-7 glyceryl cocoate 2.00

Witch Hazel 5.00

Allantoin - 0.10

Bisabolol rac. 0.20

Propylene glycol 5.00 panthenol USP 0.50

Lactic acid (80%) 0.20

Ascorbic acid 0.50

Tocopherol 0.30

Perfume qs Retinol 15D ^® 0.20

Water ad 100 Example 8

Make-up (decorative cosmetics)

% W / W

Ceteareth-6 and stearyl alcohol 9.00

Dimethicone 5.00

Cetearyl octanoate 8.00

Macadamia nut oil 5.00 propylene glycol 5.00

Retinol 15D ^® 0.66

Water ad 100

Sicovit Weiss E 171 8.00

Sicomet Braun 70 13E 3717 2.00 ascorbic acid 0.20

Tocopherol 0.50

Perfume q.s.

Benzophenone-3 5.00

Example 9

Fluid make-up (decorative cosmetics)

% W / w ceteareth-6 and stearyl alcohol 7.00

Ceteareth-25 5.00

Dimethicone 5.00

Cetearyl octanoate 8.00

Macadamia nut oil 5.00 propylene glycol 5.00

Retinol 15D ^® 0.33

Water ad 100

Sicovit Weiss E 171 8.00

Sicomet Braun 70 13E 3717 1.00 ascorbic acid 0.10

Tocopherol 0.01

Perfume q.s.

Benzophenone-3 5.00

Claims

claims

1. Preparations containing at least one retinoid, at least one water-soluble antioxidant and at least one oil-soluble antioxidant, characterized in that in the preparations per part by weight of retinoid at least 1 part by weight of one or more water-soluble antioxidants and 0.1 to 100 parts by weight of one or more oil-soluble Antioxidants are present, the content of one or more water-soluble antioxidants being in the range from 0.05 to 0.8% by weight, based on the total amount of the preparations.

2. Preparations according to claim 1, characterized in that it is cosmetic or pharmaceutical preparations or food preparations.

3. Preparations according to one of claims 1 or 2, containing 1 to 5 parts by weight of one or more water-soluble antioxidants and 5 to 10 parts by weight of one or more oil-soluble antioxidants per part by weight of retinoid.

4. Preparations according to one of claims 1 to 3, containing 2 to 3 parts by weight of one or more water-soluble antioxidants and 8 to 10 parts by weight of one or more oil-soluble antioxidants per part by weight of retinoid.

5. Preparations according to one of claims 1 to 4, containing as water-soluble antioxidant L-ascorbic acid or salts of L-ascorbic acid.

6. Preparations according to one of claims 1 to 5, containing α-tocopherol as an oil-soluble antioxidant.

7. Preparations according to one of claims 1 to 6, characterized in that the retinoid is all-trans retinol.

8. Preparations according to claim 7, containing 0.005 to 0.5 Ge. -% all-trans retinol.

9. Preparations according to one of claims 1 to 8 in the form of an O / W, W / O or multiple emulsion.

10. Preparations according to one of claims 1 to 9, characterized in that they are stored in oxygen-impermeable packaging without the addition of protective gas.

11. Preparations according to claim 10, characterized in that the packaging is an aluminum tube.

12. Preparations according to claim 11, characterized in that the inside of the aluminum tube is provided with a protective lacquer.

13. Preparations according to one of claims 1 to 12, characterized in that it is skin care preparations.