DE202008003980U1 - Bath preparation in the form of an oil-in-water emulsion with a low content of emulsifiers - Google Patents

Abstract

Bath preparation in the form of an oil-in-water emulsion, characterized in that the preparation has at least the following components.
a) 15 to 60% by weight of one or more fatty oils,
b) 0.1 to 2 wt.% O / W emulsifier,
c) 0.01 to 1% by weight of stabilizer,
d) water ad 100% by weight.

Description

The present innovation relates to bath preparations in the form of an oil-in-water emulsion, the for the application is designed in a bath. They are different Forms of bath additives known as bubble baths or so-called oil baths as well Bath salts or gels that dissolve in the bath water.

at the oily one bath products There are several problems that easily affect the acceptance of such a problem Reduce the product. If oil baths one have very low surfactant content, may be on the surface of the Bathwater an oil film form, which is particularly disturbing when cleaning the bathtub power. On the other hand, such an oil film often has the disadvantage that the oil only when you get out of the bathtub on the skin raises. There It usually dries immediately after bathing is the oil film rubbed in the towel. this leads to on the one hand to an undesirable Soiling of the towel and on the other hand, the desired care effect not achieved. oil films on the bathtub cause not only aesthetic problems, but pose a safety hazard because the friction is reduced and therefore there is a risk that the bather slips and injured.

A Another object of the present invention is a bathing preparation to provide, if possible no oily Film remains on the skin, but the bather has the feeling that oil as possible Feeds well and effectively into the skin.

For the production an oil-in-water emulsion must the oil phase in a stable emulsion in the continuous water phase are transferred. For such an emulsion to be stable are usually not Insignificant amounts of emulsifiers required. But there is a need for Products as predominantly as possible from natural Components exist and only as possible containing little chemical synthesized components, it is one Another object of the present invention, a stable oil-in-water emulsion to provide, with only a small proportion of Emulsifiers should be used.

To consider is also that fatty oils in the presence of high amounts of emulsifier by solubilization and micelle formation in their skin physiological properties so changed be that their care properties only very limited available are. Therefore has an oil bath superior with low emulsifier quantities skin care properties.

Basically an emulsion is a heterogeneous system that does not consist of at least two miscible liquids one of which is dispersed in the form of drops in the other is. Such systems are usually not stable. The problem stability of emulsions becomes common solved by adding emulsifiers. in principle consist of emulsions of continuous and discontinuous phases. The discontinuous phase is also known as the dispersed or inner phase, whereas the phase in which the dispersion occurs, referred to as the continuous or outer phase. If, as in this case, water is the continuous phase is, the emulsion is called oil-in-water (O / W).

• a) 15 bis 60 Gew.-% eines oder mehrerer fetter Öle,
• b) 0,1 bis 2 Gew.-% O/W Emulgator,
• c) 0,01 bis 1 Gew.-% Stabilisator,
• d) Wasser ad 100%.

The subject matter of the present invention is a bathing preparation in the form of an oil-in-water emulsion, the preparation having at least the following components:

• a) 15 to 60% by weight of one or more fatty oils,
• b) 0.1 to 2 wt.% O / W emulsifier,
• c) 0.01 to 1% by weight of stabilizer,
• d) water ad 100%.

emulsifiers belong to the surface-active Substances, the surfactants. Surfactants are amphiphilic substances that are due to their molecular structure both an affinity to water as well as to non-polar organic solvents, in the present Fall to the fatty oils exhibit. This is due to the chemical structure in addition to a pronounced nonpolar lipophilic part of the molecule with a polar part possess appropriate functional groups.

The emulsifiers can be characterized using the so-called HLB values. HLB stands for "hydrophilic lipophilic balance." The HLB values are intended to roughly indicate the ratio of hydrophilic and lipophilic groups in a surfactant molecule The emulsifiers used according to the invention are so-called O / W emulsifiers which have HLB values of between about 7 and about 18. According to the invention, a mixture of suitable O / W emulsifiers is preferably used as the emulsifier which have an HLB value of 8 to 18, preferably 8 to 13. In the case of mixtures of emulsifiers, a group number is assigned to the different component groups in the emulsifier mixture, and the hydrophilic-lipophilic ratio can then be calculated.

In the context of the present invention, the following emulsifiers are used in particular: esters of polyhydroxystearic acid (polymeric fatty acid) with oligomers of glycerol, in particular dimers of glycerol, polyglyceryl-2-dipolyhydroxystearates; Fatty acid esters of saturated or unsaturated C ₁₂ to C ₁₈ fatty acids esterified with glycerol, in particular glyceryl oleate. In a particularly preferred embodiment, a mixture of at least two emulsifiers is used. Such mixtures are commercially available under the designation "Emulgade CPE ^® (Cognis Corporation). The O / W emulsifiers or the O / W emulsifier mixture are preferably used in an amount of from 0.1 to 1.0% by weight, preferably from 0.3 to 0.8% by weight, based on the finished bathing preparation.

The present bathing preparation contains as an essential component 15 to 60 wt .-%, preferably 30 to 55 wt .-% of one or more fat oils. The percentage refers to the finished bath preparation.

at it is the "fatty oils" around oils, the for are suitable for cosmetic use and after application to the Skin a pronounced greasy, shiny Leave an impression. Can be used mineral oils such as Petrolatum or semi-synthetic derivatives of vegetable oils, such as Triglycerides of caprylic acid and / or capric acid.

The present bathing preparation contains as a fat oil prefers natural Vegetable oils. Almond oil, walnut oil, peach kernel oil, avocado oil, soybean oil, sesame oil, sunflower seed oil, evening primrose oil, palm kernel oil, mango kernel oil, thistle oil, macadamia nut oil, grapeseed oil, apricot kernel oil, olive oil, wheat germ oil, pumpkin seed oil, hazelnut oil, jojoba oil, canola oil, calendula oil, as well as Shea butter or castor oil. Almond oil and castor oil are particularly preferably used.

A Another essential component of the bath preparation is at least a stabilizer. Stabilizers can in principle be such agents The synergistic with the emulsifier in the maintenance of the oil-in-water emulsion Act. Gel formers are capable of a stabilized grid or to train helices. Particularly preferably used Galactoarabinans, polyacrylates, polyethylene glycols, wherein polyethylene glycols having an average molecular weight of from 500,000 D to 900,000 D, especially 600,000 D to 700,000 D are particularly preferred. One particularly preferred polyethylene glycol is PEG-14M. Can also be used Polypropylene glycols, polyethylene-polypropylene glycols or alginates. At least two different stabilizers are preferred used.

The Bathing preparation also includes the stabilizer in an amount from 0.01 to 1.0% by weight, preferably 0.2 to 0.8 wt .-%. Particularly preferred stabilizers are xanthan gum and / or PEG-14M.

In a further preferred embodiment The bath preparation also contains vegetable oils and / or extracts from Plants that have nurturing and / or curative properties be attributed. Preference is given to perfume oils or Plant extracts of lavender, pine, pine, rosemary or medicinal plants like calendula, chamomile, coltsfoot. This component is preferred in an amount of 0.01 to 5 wt .-%, particularly preferably in one Amount of 0.1 to 1.5 wt .-% used.

There the bathing preparation is an oil-in-water emulsion, this is in a proportion of 15 to 85 wt .-%, preferably 20 to 40 wt .-% and particularly preferably 30 to 38 wt .-% of water. This is preferably a sterile-filtered deionized Water. With the recipes, the individual components are measured and then made up to 100% by weight with water.

In a further preferred embodiment the bath preparation comprises one or more detergent surfactants preferably in an amount of 0.1 to 20% by weight, especially preferably 0.1 to 5 wt .-% and most preferably in one Amount of 0.1 to 1.0 wt .-% are added. In the washing active Surfactants may be anionic surfactants, amphoteric surfactants or nonionic surfactants act, with the following surfactants especially preferably used are: lauryl ether sulfates, betaines, isethionates, Sulfosuccinates. Particularly preferred are alkyl glucosides such as Lauryl glucoside, methyl glucoside or butyl glucoside.

The rheological properties of a bath preparation are for the sake of Acceptance of the consumer important. The oil-in-water emulsion should therefore not thin as Be water, but an elevated one viscosity However, although the pouring out of the bathing preparation from the storage container in the bathtub well possible have to be. Therefore, the bath preparations preferably also have a thickener on, usually in an amount of 0.1 to 5 wt .-%, preferably 0.1 to 2 wt .-% and particularly preferably 0.3 to 1.0 wt .-% is added.

When Thickeners are preferably high molecular weight polysaccharides used. This may be cellulose and modified cellulose such as cellulose ethers or biopolysaccharides such as Xanthan.

In a particularly preferred embodiment the bathing preparation has a clouding agent on. The bath preparation is present as an oil-in-water emulsion and This already has a milky character. This cloudy, milky Character is reinforced in a preferred embodiment in that a clouding agent is added. The haze effect remains even after dilution get the bath preparation in the bath water. Suitable opacifiers are pharmaceutically and cosmetically acceptable opacifiers such as titanium dioxide, Zinc oxide or calcium carbonate. It is also interesting that the opacifier together with the emulsifier and optionally the other stabilizers the stabilizing effect of the oil-in-water emulsion even stronger. Preferably, the bathing preparation has a turbidity index between 0.5 and 2.5, more preferably between 0.7 and 0.9.

The Bath preparation is surprisingly a stable oil-in-water emulsion although only a comparatively very low proportion of emulsifier is used. The upper limit of the Emulsifier is 2 wt .-%, preferably the emulsifier is in a Amount of 0.1 to 1.0 wt .-% and particularly preferably in an amount from 0.3 to 0.8 wt .-% used.

A possible statement for the surprising stability the oil-in-water emulsion could can be seen in that the emulsifier with the stabilizer component has a synergistic stabilizing effect on the emulsion.

One more surprising Advantage of the bath preparation is that after using the Bades no oily Film remains on the skin, but that despite the high oil content preferably from 40 to 55% by weight of the fatty oil is absorbed into the skin.

The present innovation is explained in more detail with reference to the example: Example 1: Composition "milk bath" INCI / CTFA Weighed by weight 1 Polyglyceryl-2-Dipolyhydroxystearate 0.35 o / w emulsifier 2 Glyceyl oleate 0.05 o / w emulsifier 3 Lauryl glucoside 0.35 surfactant 4 Dicaprylyl carbonates 0.05 5 Prunus Dulcis (Sweet Almond) Oil 15.40 natural fat oil 6 Ricinus Communis (Gastor) Seed Oil 30.00 natural fat oil 7 Perfume (fragrance) 5.00 8th Isopropyl Myristate, Hamamelis Virginiana (Witch Hazel) Extract 1.00 Fatty acid ester plant extract 9 tocopherol 0.06 Antioxidant 10 Calendula Officinalis Flower Extract 0.01 plant extract 11 Aqua (Water) 36.63 12 Glycerin, (Aqua) Water 5.30 Humectants 13 Pentylene glycol 5.00 Humectants 14 Titanum Dioxide, silica 0.30 opacifiers 15 Whey Protein (Whey Proteinum) 0.10 care products 16 Xanthan gum 0.10 stabilizer 17 PEG-14M 0.30 stabilizer total 100.00

• – Emulgatorgemisch (umfasst Bestandteile 1–4): Emulgade CPE: Cognis GmbH, 40789 Monheim, Rheinpromenade 1
• – Hamamelis-Extrakt: Cosmetochem, 47228 Duisburg-Rheinhausen, Ritterstraße 42
• – Calendula-Extrakt: Flavex Naturextrakte GmbH, 66780 Rehlingen, Nordstr. 7
• – Mischtocopherolkonzentrat 70%: Cognis GmbH, 40789 Monheim, Rheinpromenade 1 (Covi-ox T70)
• – Pentylene Glycol: Symrise GmbH & Co. KG, 37603 Holzminden, Mühlenfeldstr. 1 (Hydrolite-5)
• – Glycerol 85%: Fauth + Co. KG, 68199 Mannheim, Casterfeldstraße 93
• – Xanthan: Rahn GmbH, 60528 Frankfurt, Hahnstraße 68 (Keltrol CG-BT)
• – Titandioxid, ultrafein: Black S. GmbH, 47445 Moers, Galmesweg 65
• – Molkenprotein: Meggle GmbH, 83512 Wasserburg, Megglestr. 6–12 (Globulal 80 HGS)
• – PEG-14M: Amerchol (Polyox WSR 205).

The following commercially available products were used for the production of the milk bath:

• Emulsifier mixture (comprises components 1-4): Emulgade CPE: Cognis GmbH, 40789 Monheim, Rheinpromenade 1
• - Hamamelis extract: Cosmetochem, 47228 Duisburg-Rheinhausen, Ritterstrasse 42
• - Calendula extract: Flavex Naturextrakte GmbH, 66780 Rehlingen, Nordstr. 7
• - Mixed tocopherol concentrate 70%: Cognis GmbH, 40789 Monheim, Rheinpromenade 1 (Covi-ox T70)
• - Pentylene Glycol: Symrise GmbH & Co. KG, 37603 Holzminden, Mühlenfeldstr. 1 (Hydrolite-5)
• Glycerol 85%: Fauth + Co. KG, 68199 Mannheim, Casterfeldstrasse 93
• - Xanthan: Rahn GmbH, 60528 Frankfurt, Hahnstrasse 68 (Keltrol CG-BT)
• Titanium dioxide, ultrafine: Black S. GmbH, 47445 Moers, Galmesweg 65
• - whey protein: Meggle GmbH, 83512 Wasserburg, Megglestr. 6-12 (Globulal 80 HGS)
• - PEG-14M: Amerchol (Polyox WSR 205).

at The recipe is a milk bath, a care without oily film allows. It is an emulsion bath with a comparatively low use concentration an emulsifier mixture. Despite the high oil content of 45% remains the bath no oily Film on the skin. The stability is due to synergistic action of emulsifiers and stabilizers caused. By the addition of titanium dioxide, the turbidity of the oil bath and the stability the emulsion supports.

at the bath preparation pH and viscosity were determined. The pH was at 7.2, the viscosity at 400-800 mPa s (whole milk has a viscosity of about 1000 mPa s).

Further became the turbidity index certainly. For this, the product was in the ratio 1: 5000 and 1: 3000 with 38 ° C warm Diluted with water. Thereafter, measurement of the transmission at a wavelength of 420 nm with the UV spectrometer 8453 of the company HP in a 1 cm plastic cuvette Fa.Plastibrand.

turbidity index = Transmission in% at wavelength 420 nm on dilution 1: 5000th

At the UV spectrometer was determined according to these data, a turbidity index of 0.8635.

The oil droplet size was determined by microscope. It was determined that more than 60% this droplet have a droplet size of <2 microns.

Claims (9)

Bath preparation in the form of an oil-in-water emulsion, characterized in that the preparation has at least the following components. a) 15 to 60 wt .-% of one or more fatty oils, b) 0.1 to 2 wt .-% O / W emulsifier, c) 0.01 to 1 wt .-% stabilizer, d) water ad 100 wt .-%. Bath preparation according to claim 1, characterized that the preparation further comprises 0.1 to 5 wt .-% of a thickener having. Bath preparation according to claim 2, characterized the thickener is xanthan. Bath preparation according to one of claims 1 to 3, characterized in that it is the emulsifier to a O / W emulsifier mixture with at least two different emulsifiers is. Bath preparation according to claim 4, characterized in that the emulsifier comprises at least two different O / W emulsifiers selected from esters of polyhydroxystearic acid with oligomers of glycerol and esters of saturated and / or unsaturated C ₁₂ to C ₁₈ fatty acids with glycerol. Bath preparation according to one of the preceding claims, characterized in that it also contains 0.01 to 5% by weight of a plant extract having. Bath preparation according to one of the preceding Claims, characterized in that the fatty oil is a natural vegetable oil. Bath preparation according to one of the preceding claims, characterized characterized in that it further comprises an opacifier in an amount from 0.1 to 2 wt .-%. Bath preparation according to one of the preceding claims, characterized in that it is used as a stabilizer in polyethylene glycol has an amount of 0.1 to 0.5 wt .-%.