US20130273274A1

US20130273274A1 - N-acyl amino acid as corrosion protection

Info

Publication number: US20130273274A1
Application number: US13/911,714
Authority: US
Inventors: Burkhard Mueller; Pamela KAFTAN
Original assignee: Henkel AG and Co KGaA
Current assignee: Henkel AG and Co KGaA
Priority date: 2010-12-10
Filing date: 2013-06-06
Publication date: 2013-10-17
Also published as: EP2649137B1; DE102010062807A1; EP2649137A1; WO2012076340A1; EP2649137B2

Abstract

The present invention relates to a method of using N-acylamino acids or salts thereof to protect metal from corrosion, and to containers that at least in portions enclose a cavity, where the container comprises at least one metallic part and where a composition that encompasses at least one N-acylamino acid and water is arranged in the cavity.

Description

FIELD OF THE INVENTION

The present invention generally relates to the use of N-acylamino acids or salts thereof to protect metal from corrosion, and to products that encompass a metal-containing container in which a composition encompassing at least one N-acylamino acid (or salt thereof) and water is contained.

BACKGROUND OF THE INVENTION

The spray or foam delivery form represents an important and essential type of application aid for a variety of product types, in particular for products to be used in the home and in cosmetics. For example, cleaning foams, cleaning sprays, room scenting sprays, deodorant sprays, hair sprays, or hair foams are known. If the sprays or foams are to be delivered out of an aerosol container that is under pressure, the compositions to be sprayed or foamed are packaged predominantly in aerosol containers made of metal, for example of aluminum.
Aerosol containers made of metal can be effectively filled and sealed gas-tight in the production process. Directly after this production process, these filled aerosol containers withstand the applied internal gas pressure to an outstanding degree. It is only after a certain storage period that sealing problems often occur, usually caused by corrosion of the metal parts. Continuous contact between a composition that is, for example, to be sprayed or foamed and metal components of the container is favorable to corrosion. Corrosion promotes, for example, pitting on walls of an aerosol container, which often results in leakage of the aerosol container. Gas and product emerge at the leak sites, decreasing the functionality of the product as well as product safety. In addition, corrosion can likewise impair the functionality of the valve. For the consumer product sector, several years sometimes lapse between manufacture of the product and use of the last product residues. The customer must therefore be assured, inter alia, that the product (encompassing the application system and the composition to be applied) is not subject to any modification due to corrosion, and will still function correctly even after such a period.
There has been no lack of attempts in the past to solve this problem. One possibility for protecting metal from corrosion is offered by an internal coating of the metal wall with a paint. For purposes of the invention (see DIN EN 927-1: 1996-10) a “paint” is a liquid or pasty or powdered (optionally pigmented) coating substance that, when applied onto a substrate, results in a covering coating having protective, decorative, or other specific technical properties. Liquid paints (i.e. wet paints) are usually used to coat metal, in which context the paints themselves as well as the paint layer resulting therefrom contain organic solvents. For environmental reasons and for occupational safety reasons, organic solvents should largely be avoided in paints. A “powder paint” is understood for purposes of the invention (see DIN EN 971-1: 1996-09) as powdered, solvent-free coating substances that yield a coating after melting and optionally, baking. Powder paints are likewise suitable for coating aerosol containers. The coating achieved using powder paint exhibits increased pore formation, however, as a result of air inclusions. These pores in turn offer a possibility for contact between the metal and the composition to be sprayed or foamed, and promote corrosion.
In addition, microcracks in the internal coating of painted aerosol containers are produced to a certain extent by the crimping operation that is usual for sealing the containers. Corrosion again preferentially forms at these microcracks in the internal coating.
It has now been found, surprisingly, that the corrosion of metal parts (in particular of storage or delivery receptacles filled with corrosive liquids) can be considerably reduced or even prevented by the use of at least one N-acylamino acid.
Furthermore, other desirable features and characteristics of the present invention will become apparent from the subsequent detailed description of the invention and the appended claims, taken in conjunction with this background of the invention.

BRIEF SUMMARY OF THE INVENTION

In an embodiment, a method of protecting metal from corrosion comprises: using at least one N-acylamino acid or salts thereof to protect the metal.
In an embodiment, a product comprises: a product encompassing a container that at least in portions surrounds a cavity, wherein the container comprises at least one metallic part and wherein a composition that encompasses at least one N-acylamino acid and water is arranged in the cavity.

DETAILED DESCRIPTION OF THE INVENTION

The following detailed description of the invention is merely exemplary in nature and is not intended to limit the invention or the application and uses of the invention. Furthermore, there is no intention to be bound by any theory presented in the preceding background of the invention or the following detailed description of the invention.
Aqueous compositions containing N-acylamino acid are known, for example from the cosmetics sector in the context of hair care, from Hart, J. Roger; Levy, Edward F., Org. Chem. Div. W. R. Grace and Co., Nashua, N.H., USA, Soap, Cosmetics, Chemical Specialties (1977), 53(8), 31-34.
A first subject of the invention is the use of at least one N-acylamino acid or salts thereof to protect metal from corrosion.
“Corrosion” is understood for purposes of the invention as the reaction of a metallic material with its surroundings, which produces a measurable change in the material and can lead to an impairment of the function of a metallic component or of an entire system (see DIN 50900-1: 1982-04, -2: 1984-01 and -3: 1985-09).
Amino acids are carboxylic acids having one or more amino groups. Depending on the molecular structure of the N-acylamino acids according to the present invention, an acyl residue binds to at least one of the amino groups of the amino acid that are present.
When reference is made hereinafter to an “N-acylamino acid,” the salt form thereof is likewise implied according to the present invention.
It is preferred if the acyl residue of the N-acylamino acid is a saturated or unsaturated, linear or branched (C₈to C₃₀) acyl residue. It is preferred in turn if the (C₈to C₃₀) acyl residue derives from capric acid, caprylic acid, lauric acid, stearic acid, oleic acid, palmitic acid, linoleic acid, linolenic acid, fatty acid mixtures of coconut oil, fatty acid mixtures of palm oil, fatty acid mixtures of tall oil, or fatty acid mixtures of rape oil.
The fatty acid mixtures recited above are the respective fatty acid cut of the glycerides of the correspondingly recited oil.
The N-acylamino acids usable according to the present invention are preferably N-acylated alpha-amino acids. These N-acylated amino acids can be selected from among N-acylated aliphatic amino acids (in particular N-acylated glycine, N-acylated alanine, N-acylated valine, N-acylated leucine, N-acylated isoleucine), N-acylated aromatic amino acids (in particular N-acylated phenylalanine, N-acylated tyrosine, N-acylated tryptophan), N-acylated acid amino acids (in particular N-acylglutamic acid, N-acylsarcosine, or N-acylaspartic acid), as well as N-acylated basic amino acids (in particular N-acylated arginine, N-acylated lysine, N-acylated histidine). It is preferred in turn to select the N-acylamino acids from at least one acid amino acid. In the context of the embodiments recited above, the aforementioned saturated or unsaturated, linear or branched N—(C₈to C₃₀) acyl residues are in turn respectively preferred, especially those explicitly recited (see above).
Particularly preferable N-acylamino acids are selected from at least one compound of formula (I)
in which
R¹signifies a linear or branched, saturated or unsaturated hydrocarbon residue,
R²denotes a hydrogen atom, a (C₁to C₄) alkyl group, or a (C₂to C₄) hydroxyalkyl group,
R³denotes a hydrogen atom or a group, where n=1 or 2,
M signifies, mutually independently, a hydrogen atom or an equivalent of a monovalent or polyvalent cation.
Examples of (C₁to C₄) alkyl groups according to the present invention are methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl.
Examples of (C₂to C₄) hydroxyalkyl groups according to the present invention are 2-hydroxyethyl, 3-hydroxypropyl, 2-hydroxypropyl, and 4-hydroxybutyl.
The residues R¹of formula (I) preferably denote a (C₉to C₂₃) alkyl group, a (C₉to C₂₃) alkenyl group having up to four unsaturated double bonds, or a (C₉to C₂₃) hydroxyalkyl group, particularly preferably, mutually independently, a residue selected from the list that is constituted from nonyl, undecyl, tridecyl, pentadecyl, heptadecyl, nonadecyl, henicosanyl, 15-methylhexadecyl, heptadec-8-enyl, heptadeca-8,11-dienyl, nonadeca-4,7,10,13-tetraenyl, and heptadeca-8,11,14-trienyl.
The residue R²according to formula (I) preferably denotes a residue selected from the group constituted from a hydrogen atom, methyl, ethyl, isopropyl, n-propyl, and 2-hydroxyethyl. The aforesaid residue R²particularly preferably denotes a hydrogen atom or a methyl group.
For the case in which R³denotes a hydrogen atom, R²preferably denotes a methyl group.
For the case in which R³denotes a
group, R²preferably denotes a hydrogen atom.
If the compounds of formula (I) are present as an acid, the residue M denotes a hydrogen atom. If the compounds of formula (I) are present as a salt, M denotes an equivalent of a monovalent or polyvalent cation. The monovalent or polyvalent cation M^z+ respectively having a valency z of one or higher serves, merely for reasons of electroneutrality, to compensate for the single negative charge of the carboxylate fragment —COO⁽⁻⁾of formula (I) that is present in the context of salt formation. The equivalent of the corresponding cation that is to be used is equal to 1/z. In the case of salt formation, the fragment —COOM of formula (I) denotes the group:
—COO⁽⁻⁾1/z(M^z+).
All physiologically acceptable cations are suitable in principle as monovalent or polyvalent cations M. These are, in particular, metal cations of the physiologically acceptable metals from groups Ia, Ib, IIa, IIb, Mb, VIa, or VIII of the periodic table of the elements, ammonium ions, as well as cationic organic compounds having a quaternized nitrogen atom. The latter are formed, for example, by protonation of primary, secondary, or tertiary organic amines with an acid, for example with compounds of formula (I) in their acid form, or by permanent quaternization of the said organic amines. Examples of these cationic organic ammonium compounds are 2-ammonioethanol and 2-trimethylammonioethanol. M resp. M′ in formula (I) preferably denotes a hydrogen atom, an ammonium ion, an alkali metal ion, a half-equivalent of an alkaline-earth metal ion, or a half-equivalent of a zinc ion, particularly preferably a hydrogen atom, an ammonium ion, a sodium ion, a potassium ion, 1/2-calcium ion, 1/2-magnesium ion, or 1/2-zinc ion.
The compounds of formula (I) are preferably selected from at least one compound of the group that is constituted from N-lauroylsarcosine, N-myristoylsarcosine, N-palmitoylsarcosine, N-oleylsarcosine, N-cocoylsarcosine (a mixture of compounds being present in this case, and “cocoyl” corresponding to the composition of the fatty acid cut of coconut oil), N-palm kernel sarcosine (a mixture of compounds being present in this case, and “palm kernel” corresponding to the composition of the fatty acid cut of palm kernel oil), N-lauroyl glutamate, N-myristoyl glutamate, N-palmitoyl glutamate, N-oleyl glutamate, N-cocoyl glutamate (a mixture of compounds being present in this case, and “cocoyl” corresponding to the composition of the fatty acid cut of coconut oil), N-palm kernel glutamate (a mixture of compounds being present in this case, and “palm kernel” corresponding to the composition of the fatty acid cut of palm kernel oil), and from the salts (in particular the sodium salts) of the compounds recited above.
The triglycerides of coconut oil exhibit the following fatty acid composition:


	45 to 51%	lauric acid
	16 to 19%	tetradecanoic acid
	8 to 10%	oleic acid
	9 to 11%	palmitic acid
	6 to 9%	decanoic acid
	5 to 8%	octanoic acid.

The triglycerides of palm kernel oil exhibit the following fatty acid composition:


	47 to 52%	lauric acid
	16 to 19%	tetradecanoic acid
	10 to 18%	oleic acid
	6 to 9%	palmitic acid
	2 to 3%	stearic acid
	1 to 3%	linoleic acid
	2 to 5%	decanoic acid
	1 to 3%	octanoic acid.

The said N-acylamino acid is used in the context of a preferred embodiment to decrease corrosion due to liquid compositions. For this purpose the N-acylamino acid can be applied as a coating onto the metal, or can be introduced into the liquid composition. In the context of a particularly preferred embodiment of the invention the N-acylamino acid or salt thereof is preferably present dissolved in a medium that is liquid at a temperature from 10 to 40° C. at 1013 millibar (mbar). The liquid medium is preferably a water-containing liquid medium, in particular a water-containing electrolyte solution. An “electrolyte” is understood for purposes of the invention as a chemical compound that is present dissociated into ions in a solution of the corresponding water-containing liquid medium. Said electrolytes are different from the said N-acylamino acids.
A second subject of the invention is a product encompassing a container that at least in portions surrounds a cavity, where the container comprises at least one metallic part and where a composition that encompasses at least one N-acylamino acid and water is arranged in the cavity.
N-Acylamino acids that are preferably usable are those of the first subject of the invention.
The composition contains the N-acylamino acid preferably in a quantity from 0.0001 to 5.0 wt %, particularly preferably from 0.005 to 2.0 wt %, very particularly preferably from 0.005 to 1.0 wt %, based in each case on the weight of the composition.
The composition contains preferably at least 20 wt % water, particularly preferably at least 40 wt %, based in each case on the weight of the composition.
The composition present in the cavity of the container is preferably liquid at least at a temperature from 10 to 40° C. at 1013 mbar.
The composition present in the cavity of the container preferably contains additional electrolytes besides the N-acylamino acid. These can be organic and/or inorganic salts, for example sodium chloride, anionic surfactants, cationic surfactants, or can be polyelectrolytes such as, for example, ionic film-forming and/or ionic setting polymers (in particular corresponding cationic polymers, anionic polymers, or amphoteric polymers). The additional electrolytes are of course different from the N-acylamino acids.
The N-acylamino acids used according to the present invention decrease to a particular extent, the corrosion potential of compositions that encompass halogen-containing electrolytes, in particular selected from chloride- and bromide-containing electrolytes.
“Film-forming polymers” are to be understood as those polymers that, upon drying, leave behind a continuous film on the skin, hair, or nails. Film-formers of this kind can be used in a very wide variety of cosmetic products such as, for example, face masks, make-up, hair setting agents, hair sprays, hair gels, hair waxes, hair therapies, shampoos, or nail polishes. Those polymers that possess sufficient solubility in water, alcohol or in water/alcohol mixtures to be present in completely dissolved form in the agent according to the present invention are particularly preferred. The film-forming polymers can be of synthetic or natural origin.
“Film-forming polymers” are furthermore understood as those polymers that, when applied in a 0.01- to 20-wt % aqueous, alcoholic, or aqueous alcoholic solution, are capable of depositing a transparent polymer film on the hair.
Setting polymers contribute to the hold, and/or to buildup of the hair volume and hair fullness, of the overall hairstyle. These polymers are at the same time also film-forming polymers and are therefore generally typical substances for shape-imparting hair-treatment agents such as hair setting agents, hair foams, hair waxes, hair sprays. It is certainly possible for film formation to be localized, and for only a few fibers to be connected to one another.
The corrosion protection according to the present invention is suitable in particular for those compositions that, besides water, additionally contain at least one cationic surfactant and/or at least one cationic polymer. A “polymer” is understood according to the present invention as a substance having an average molar mass (weight-average) greater than 10,000 grams per mol (g/mol) that is constructed from at least one repeating structural unit and is accessible by way of a natural or synthetic polyreaction (i.e. reaction of a monomer or of a mixture of different monomers).
Cationic polymers comprise, for purposes of the invention, at least one structural unit that contains at least one permanently cationized nitrogen atom. “Permanently” cationized nitrogen atoms are to be understood as those nitrogen atoms that carry a positive charge and thereby form a quaternary ammonium compound. Quaternary ammonium compounds are usually produced by the reaction of tertiary amines with alkylating agents such as, for example, methyl chloride, benzyl chloride, dimethyl sulfate, dodecyl bromide, but also ethylene oxide. Depending on the tertiary amine used, the following groups are known in particular: alkylammonium compounds, alkenylammonium compounds, imidazolinium compounds, and pyridinium compounds.
Compositions preferred for purposes of the invention contain the cationic polymers in a quantity from 0.1 wt % to 20.0 wt %, particularly preferably from 0.2 wt % to 10.0 wt %, based in each case on the weight of the agent.
The cationic polymers are preferably selected from cationic quaternized cellulose derivatives.
Those cationic quaternized celluloses that carry more than one permanent cationic charge in a side chain have proven in general to be advantageous. To be emphasized thereamong are, among the cationic cellulose derivatives, those that are manufactured by the reaction of hydroxyethyl cellulose with a dimethyldiallylammonium reactant (in particular dimethyldiallylammonium chloride), optionally in the presence of further reactants. Particularly suitable in turn among these cationic celluloses are those cationic celluloses having the INCI name Polyquaternium-4, which are marketed e.g. under the names Celquat® H 100, Celquat® L 200 by the National Starch company.
Also preferably suitable are those cationic polymers that encompass at least one structural unit of formula (I) and at least one structural unit of formula (2) and optionally at least one structural unit of formula (3)
in which
R¹and R⁴denote, mutually independently, a hydrogen atom or a methyl group,
A¹and A²denote, mutually independently, an ethane-1,2-diyl, propane-1,3-diyl, or butane-1,4-diyl group,
R², R³, R⁵, and R⁶denote, mutually independently, a (C₁to C₄) alkyl group,
R⁷denotes a (C₈to C₃₀) alkyl group.
All possible physiologically acceptable anions, for example chloride, bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate, tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate, or p-toluenesulfonate, triflate, serve to compensate for the positive charge of monomer (3).
It may be preferred if the cationic polymers additionally encompass, besides the structural units of formula (I) and of formula (2) and of formula (3), at least one structural unit of formula (4):
Suitable compounds are commercially obtainable, for example, as

- copolymers of dimethylaminoethyl methacrylate, quaternized with diethyl sulfate, with vinylpyrrolidone, having the INCI name Polyquaternium-11, under the designations Gafquat® 440, Gafquat® 734, Gafquat® 755 (each ISP company) and Luviquat PQ 11 PN (BASF SE),
- copolymers of methacryloylaminopropyllauryldimethylammonium chloride with N-vinylpyrrolidone and dimethylaminopropyl methacrylamide, having the INCI name Polyquaternium-55, under the commercial names Styleze® W-10, Styleze® W 20 (ISP company),
- copolymers of methacryloylaminopropyllauryldimethylammonium chloride with N-vinylpyrrolidone, N-vinylcaprolactam, and dimethylaminopropyl methacrylamide, having the INCI name Polyquaternium-69, under the commercial name Aquastyle® 300 (ISP company).

Also included among cationic polymers preferably suitable for purposes of the invention are those cationic copolymers that contain at least one structural element of formula (M1)
in which
R″ denotes a (C₁to C₄) alkyl group, in particular a methyl group, and additionally comprise at least one further cationic and/or nonionic structural element.
All possible physiologically acceptable anions, for example chloride, bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate, tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate, or p-toluenesulfonate, triflate, serve to compensate for the positive polymer charge.
It is preferred according to the present invention if the agent according to the present invention contains as a cationic polymer at least one copolymer that, besides at least one structural element of formula (M1), additionally encompasses at least one structural element of formula (I)
in which
R″ denotes a (C₁to C₄) alkyl group, in particular a methyl group.
All possible physiologically acceptable anions, for example chloride, bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate, tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate, or p-toluenesulfonate, triflate, serve to compensate for the positive polymer charge of the copolymers.
Particularly preferred cationic polymers contains 10 to 30 mole percent (mol %), by preference 15 to 25 mol %, and in particular 20 mol % structural units according to formula (M1) and 70 to 90 mol %, by preference 75 to 85 mol %, and in particular 80 mol % structural units according to formula (I).
It is particularly preferred in this context if the copolymers contain, besides polymer units that result from incorporation of the aforesaid structural units according to formula (M1) and (1) into the copolymer, a maximum of 5 wt %, by preference a maximum of 1 wt % polymer units that are based on the incorporation of other monomers. By preference, the copolymers are constructed exclusively, except for the terminus, from structural units of formula (M1) where R″=methyl, and (1), and can be described by the general formula (Poly1)
where the indices m and p each vary depending on the molar mass of the polymer and are not intended to signify that these are block copolymers. Structural units of formula (M1) and of formula (I) can instead be present in statistically distributed fashion in the molecule.
If a chloride ion is used to compensate for the positive charge of the polymer of formula (Poly1), these N-methylvinylimidazole/vinylpyrrolidone copolymers are then referred to according to INCI nomenclature as Polyquaternium-16 and are obtainable e.g. from BASF under the commercial names Luviquat® Style, Luviquat® FC 370, Luviquat® FC 550, Luviquat® FC 905, and Luviquat® HM 552.
If a methosulfate is used to compensate for the positive charge of the polymer of formula (Poly1), these N-methylvinylimidazole/vinylpyrrolidone copolymers are then referred to according to INCI nomenclature as Polyquaternium-44 and are obtainable e.g. from BASF under the commercial names Luviquat® UltraCare.
Particularly preferred agents according to the present invention contain a copolymer, in particular of formula (Poly1), that has molar masses within a specific range. Agents according to the present invention in which the copolymer has a molar mass from 50 to 400 kilo Daltons (kDa), by preference from 100 to 300 kDa, more preferably from 150 to 250 kDa, and in particular from 190 to 210 kDa, are preferred here.
In addition to or instead of the copolymer or copolymers, the compositions according to the present invention can also contain copolymers that, besides structural units of formulas (M1-a) and (1), contain as additional structural units those of formula (4)
Further particularly preferred agents according to the present invention are thus characterized in that they contain as a cationic polymer at least one copolymer that contains at least one structural unit in accordance with formula (M1-a) and at least one structural unit in accordance with formula (I) and at least one further structural unit in accordance with formula (4)
Here as well, it is particularly preferred if the copolymers contain, besides polymer units that result from the incorporation of the aforesaid structural units according to formulas (M1-a), (1), and (4) into the copolymer, a maximum of 5 wt %, by preference a maximum of 1 wt %, polymer units that are based on the incorporation of other monomers. The copolymers are by preference constructed exclusively, except for the terminus, from structural units of formulas (M1-a), (1), and (4), and can be described by the general formula (Poly2)
where the indices m, n and p each vary depending on the molar mass of the polymer and are not intended to signify that these are block copolymers. Structural units of the aforesaid formulas can instead be present in statistically distributed fashion in the molecule.
All possible physiologically acceptable anions, for example chloride, bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate, tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate, or p-toluenesulfonate, triflate, serve to compensate for the positive polymer charge of the component.
If a methosulfate is used to compensate for the positive charge of the polymer of formula (Poly2), these N-methylvinylimidazole/vinylpyrrolidone/vinylcaprolactam copolymers are then referred to according to INCI nomenclature as Polyquaternium-46 and are obtainable e.g. from BASF under the commercial name Luviquat® Hold.
Very particularly preferred copolymers contain 1 to 20 mol %, by preference 5 to 15 mol %, and in particular 10 mol % structural units according to formula (M-1a), and 30 to 50 mol %, by preference 35 to 45 mol %, and in particular 40 mol % structural units according to formula (I), and 40 to 60 mol %, by preference 45 to 55 mol %, and in particular 60 mol % structural units according to formula (4).
Particularly preferred agents according to the present invention contain a copolymer that has molar masses within a specific range. Agents according to the present invention in which the copolymer has a molar mass from 100 to 1000 kDa, by preference from 250 to 900 kDa, more preferably from 500 to 850 kDa, and in particular from 650 to 710 kDa, are preferred here.
The compositions according to the present invention can also contain, as a cationic polymer, copolymers that comprise as structural units structural units of formulas (M1-a) and (1), as well as further structural units from the group of the vinylimidazole units and further structural units from the group of the acrylamide and/or methacrylamide units.
Further particularly preferred agents according to the present invention are characterized in that they contain, as a cationic polymer, at least one copolymer that contains at least one structural unit according to formula (M−1a) and at least one further structural unit according to formula (I) and at least one further structural unit according to formula (5) and at least one further structural unit according to formula (6)
Here as well, it is particularly preferred if the copolymers contain, besides polymer units that result from incorporation of the aforesaid structural units according to formulas (M1-a), (1), (5), and (6) into the copolymer, a maximum of 5 wt %, by preference a maximum of 1 wt %, polymer units that are based on the incorporation of other monomers. The copolymers are by preference constructed exclusively, except for the terminus, from structural units of formulas (M1-a), (1), (5), and (6) and can be described by the general formula (Poly3)
where the indices m, n, o and p each vary depending on the molar mass of the polymer and are not intended to signify that these are block copolymers. Structural units of formulas (M1-a), (1), (5), and (6) can instead be present in statistically distributed fashion in the molecule.
All possible physiologically acceptable anions, for example chloride, bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate, tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate, or p-toluenesulfonate, triflate, serve to compensate for the positive polymer charge of the component.
If a methosulfate is used to compensate for the positive charge of the polymer of formula (Poly3), these N-methylvinylimidazole/vinylpyrrolidone/vinylimidazole/methacrylamide copolymers are referred to according to INCI nomenclature as Polyquaternium-68 and are obtainable e.g. from BASF under the commercial name Luviquat® Supreme.
Very particularly preferred copolymers contain 1 to 12 mol %, by preference 3 to 9 mol %, and in particular 6 mol % structural units according to formula (M-1a), and 45 to 65 mol %, by preference 50 to 60 mol %, and in particular 55 mol % structural units according to formula (I), and 1 to 20 mol %, by preference 5 to 15 mol %, and in particular 10 mol % structural units according to formula (5), and 20 to 40 mol %, by preference 25 to 35 mol %, and in particular 29 mol % structural units according to formula (6).
Particularly preferred agents according to the present invention contain a copolymer that has molar masses within a specific range. Agents according to the present invention in which the copolymer has a molar mass from 100 to 500 kDa, by preference from 150 to 400 kDa, more preferably from 250 to 350 kDa, and in particular from 290 to 310 kDa, are preferred here.
Among the additional cationic polymers having at least one structural element of the above formula (M1), those considered preferred are:

- vinylpyrrolidone/1-vinyl-3-methyl-1H-imidazolium chloride copolymers (such as, for example, the one having the INCI name Polyquaternium-16, under the commercial designations Luviquat® Style, Luviquat® FC 370, Luviquat® FC 550, Luviquat® FC 905, and Luviquat® HM 552 (BASF SE)),
- vinylpyrrolidone/1-vinyl-3-methyl-1H-imidazolium methyl sulfate copolymers (such as, for example, the one having the INCI name Polyquaternium-44, under the commercial designations Luviquat® Care (BASF SE)),
- vinylpyrrolidone/vinylcaprolactam/1-vinyl-3-methyl-1H-imidazolium terpolymers (such as, for example, the one having the INCI name Polyquaternium-46, under the commercial designations Luviquat® Care or Luviquat® Hold (BASF SE)),
- vinylpyrrolidone/methacrylamide/vinylimidazole/1-vinyl-3-methyl-1H-imidazolium methyl sulfate copolymers (such as, for example, the one having the INCI name Polyquaternium-68, under the commercial designations Luviquat® Supreme (BASF SE)),
  as well as mixtures of said polymers.

All usual cationic surfactants known to one skilled in the art can be used according to the present invention as cationic surfactants. Cationic surfactants that are preferably suitable are permanently cationic. Particularly preferred cationic surfactants are selected from among:

- quaternary imidazoline compounds. The formula Quimi-I depicted below shows the structure of these compounds.

The residues R denote, mutually independently in each case, a saturated or unsaturated, linear or branched hydrocarbon residue having a change length from 8 to 30 carbon atoms. The preferred compounds of formula I contain the same hydrocarbon residue for each residue R. The chain length of the residues R is preferably 12 to 21 carbon atoms. Examples that are particularly in accordance with the present invention are obtainable, for example, under the INCI names Quaternium-27, Quaternium-72, Quaternium-83, and Quaternium-91.

- cationic surfactants in accordance with formula (Tkat-2),

RCO—X—N⁺R¹R²R³A⁻ (Tkat-2).
R therein denotes a substituted or unsubstituted, branched or straight-chain alkyl or alkenyl residue having 11 to 35 carbon atoms in the chain,
X denotes —O— or —NR⁵—,
R¹denotes an alkylene group, having 2 to 6 carbon atoms, which can be substituted or unsubstituted; in the event of a substitution, substitution with an —OH or —NH group is preferred,
R², R³each denote, mutually independently, an alkyl or hydroxyalkyl group having 1 to 6 carbon atoms in the chain, such that the chain can be straight or branched.
R⁵denotes hydrogen or a C₁to C₆straight-chain or branched alkyl or alkenyl residue, which can also be substituted with a hydroxy group.
Within this structure class, the compounds having one of the following structures are used in preferred fashion:
CH₃(CH₂)₂₀CONH(CH₂)₃—N⁺(CH₃)₂—CH₂CH₃A⁻ (Tkat-3)
CH₃(CH₂)₂₀CONH(CH₂)₃—N⁺(CH₃)₂—CH₂(CHOH)CH₂OHA⁻ (Tkat-4)
CH₃(CH₂)₂₀COOCH₂CHOHCH₂—N⁺(CH₃)₃A⁻ (Tkat-5)
CH₃(CH₂)₂₀CONH(CH₂)₃—N⁺(CH₃)₂—CH₂CH₂OHA⁻ (Tkat-6).
Examples of commercial products of this kind are Schercoquat BAS, Lexiquat AMG-BEO, Akypoquat 131, or Incroquat Behenyl HE.

- Esterquats in accordance with formula (Tkat1-2) can be used:

The residues R1, R2, and R3 therein are each mutually independent and can be the same or different. Residues R1, R2, and R3 denote:

- a branched or unbranched alkyl residue having 1 to 4 carbon atoms, which can contain at least one hydroxyl group, or
- a saturated or unsaturated, branched or unbranched, or cyclic unsaturated or unsaturated alkyl residue having 6 to 30 carbon atoms, which can contain at least one hydroxyl group, or
- an aryl or alkaryl residue, for example phenyl or benzyl,
- the residue (-A-R4), provided that at most two of the residues R1, R2, or R3 can denote this residue:
  The residue -(A-R4) is contained at least 1 to 3 times.
  In this, A denotes:
- 1) —(CH₂)n-, where n=1 to 20, by preference n=1 to 10, and particularly preferably n=1 to 5, or
- 2) —(CH₂—CHR⁵—O)n-, where n=1 to 200, by preference 1 to 100, particularly preferably 1 to 50, and particularly preferably 1 to 20, where R5 has the meaning of hydrogen, methyl, or ethyl, and
- R4 denotes:
- 1) R6-O—CO—, in which R6 is a saturated or unsaturated, branched or unbranched, or cyclic saturated or unsaturated alkyl residue having 6 to 30 carbon atoms, which can contain at least one hydroxy group, and which optionally can be further oxyethylated with 1 to 100 ethylene oxide units and/or 1 to 100 propylene oxide units, or
- 2) R7-CO—, in which R7 is a saturated or unsaturated, branched or unbranched, or cyclic saturated or unsaturated alkyl residue having 6 to 30 carbon atoms, which can contain at least one hydroxy group, and which optionally can be further oxyethylated with 1 to 100 ethylene oxide units and/or 1 to 100 propylene oxide units, and
  - Q denotes a physiologically acceptable organic or inorganic anion.
  - Such products are marketed, for example, under the trademarks Rewoquat®, Stepantex®, Dehyquart®, and Armocare®. Examples of such esterquats are the products Armocare® VGH-70 —an N,N-bis(2-palmitoyloxyethyl)dimethylammonium chloride—as well as Dehyquart® F-75, Dehyquart® C.-4046, Dehyquart® L-80, Dehyquart® F-30, Dehyquart® AU-35, Rewoquat® WE18, Rewoquat® WE38 DPG, and Stepantex® VS 90.
    Further compounds of formula (Tkat1-2) that are particularly preferred according to the present invention belong to formula (Tkat1-2.1), the cationic betaine esters:

The meaning of R8 corresponds to that of R7.

- Monoalkyltrimethylammonium salts having an alkyl residue chain length from 12 to 24 carbon atoms, corresponding to formula (Tkat1-1)

in which
R1, R2, and R3 each denote a methyl group and R4 denotes a saturated, branched, or unbranched alkyl residue having a chain length from 12 to 24 carbon atoms and A⁻ signifies an anion.
Examples of compounds of formula (Tkat1-1) are cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, cetyltrimethylammonium methosulfate, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, behenyltrimethylammonium bromide, and benehyltrimethylammonium methosulfate.
quaternized amidoamines having the following structural formula:
R¹—N—(CH₂)_n—N⁺R²R³R⁴ (Tkat7)
in which,
R¹denotes an acyl or alkyl residue having 6 to 30 carbon atoms, which can be branched or unbranched, saturated or unsaturated, and such that the acyl residue and/or alkyl residue can contain at least one OH group, and
R², R³, and R⁴each denote, mutually independently, hydrogen or an alkyl residue having 1 to 4 carbon atoms, which can be the same or different, saturated or unsaturated
X⁻ signifies an anion, and
n signifies a whole number between 1 and 10.
Amidoamines that are quaternized and are suitable for use according to the present invention are Rewoquat® RTM 50 (Witco Surfactants GmbH, INCI name: Ricinoleamidopropyltrimonium Methosulfate), Empigen® CSC (Albright & Wilson, INCI name: Cocamidopropyltrimonium Chloride), Swanol® Lanoquat DES-50 (Nikko, INCI name: Quaternium-33), Rewoquat® UTM 50 (Witco Surfactants GmbH, Undecyleneamidopropyltrimonium Methosulfate).
cationic surfactants of formula (Tkat-8)
in which
x and y mutually independently denote a whole number greater than 0,
R denotes a (C₈to C₂₀) alkyl group or a (C₈to C₂₀) alkenyl group,
R¹denotes a *—(CH₂CH₂O)_zH group in which z signifies a whole number greater than 0, a (C₈to C₂₀) alkyl group, or a (C₈to C₂₀) alkenyl group,
X⁻ denotes an anion. It is preferred according to the present invention if R′ according to formula (Tkat-8) denotes a *-(CH₂CH₂O)_zH group in which z signifies a whole number greater than 0. A preferred cationic surfactant of formula (Tkat-8) is the tris(oligooxyethyl)alkylammonium dihydrogen phosphate salt, having a molecular weight of 780 g/mol, that has the INCI name Quaternium-52 and is marketed, for example, under the commercial name Dehyquart® SP by the Cognis company.
The anion of all the cationic compounds described above is selected from the physiologically acceptable anions. Examples thereof that may be recited are, for example, the halide ions, fluoride, chloride, bromide, sulfate of the general formula RSO₃ ⁻ in which R has the meaning of a saturated or unsaturated alkyl residues having 1 to 4 carbon atoms, or anionic residues of organic acids such as maleate, fumarate, oxalate, tartrate, citrate, lactate, or acetate.
It is very particularly preferred if the composition according to the present invention contains at least one mono alkyltrimethylammonium salt of formula (Tkat1-1)
in which R1, R2, and R3 each denote a methyl group and R4 denotes a saturated, branched or unbranched alkyl residue having a chain length from 12 to 24 carbon atoms, and A⁻ signifies an anion, in particular chloride or bromide.
Very particularly preferred compounds of formula (Tkat1-1) are selected from among cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, cetyltrimethylammonium methosulfate, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, behenyltrimethylammonium bromide, benehyltrimethylammonium methosulfate.
The cationic surfactants recited above can be used individually or in any combination with one another.
The utilization quantities of the cationic surfactants are preferably between 0.01 and 20 wt %; quantities from 0.01 to 10 wt % are particularly preferably contained, and quantities from 0.1 to 7.5 wt % are very particularly preferably contained. The best results of all are obtained with quantities from 0.1 to 5 wt %. All quantities are based respectively on the weight of the total composition.
The compositions can additionally contain at least one monoalcohol having 1 to 4 carbon atoms, such as e.g. ethanol, isopropanol.
It is thus possible to use at least one (C₁to C₄) monoalkyl alcohol in the agents according to the present invention, in particular in a quantity from 1 to 50 wt %, in particular from 5 to 30 wt %. This can in turn be preferred in particular for packaging as an aerosol foam.
At least one organic solvent having a boiling point below 400° C., or at least one mixture of the said solvents, can be contained as additional co-solvents (once again preferably in a quantity from 0.1 to 15 weight percent, particularly preferably from 1 to 10 weight percent based on the total composition).
Particularly preferred water-soluble solvents are glycerol, ethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol (once again preferably in a quantity of up to 15 wt % based on the total composition).
The addition in particular of glycerol and/or propylene glycol and/or polyethylene glycol and/or polypropylene glycol additionally increases the flexibility of the polymer film formed when the composition according to the present invention is used. If a particularly flexible hold is desired, the compositions according to the present invention therefore contain by preference 0.01 to 15 wt % glycerol and/or propylene glycol and/or polyethylene glycol and/or polypropylene glycol, based on the total composition.
The compositions preferably have a pH from 2 to 11. Particularly preferably, the pH range is between 2 and 7, very particularly preferably between 4 and 6. The indications as to pH refer here, for purposes of this document, to the pH at 25° C. unless otherwise noted.
The compositions according to the present invention can furthermore contain the adjuvants and additives that are usually added to conventional styling agents.
Additional care-providing substances may be recited in particular as suitable adjuvants and additives.
A silicone oil and/or a silicone gum can be used, for example, as a care-providing substance.
Silicone oils or silicone gums that are suitable according to the present invention are, in particular, dialkyl- and alkylarylsiloxanes, for example dimethylpolysiloxane and methylphenylsiloxane, as well as alkoxylated, quaternized, or also anionic derivatives thereof. Cyclic and linear polydialkylsiloxanes, alkoxylated and/or aminated derivatives thereof, dihydroxypolydimethylsiloxanes, and polyphenylalkylsiloxanes are preferred.
Silicone oils produce a very wide variety of effects. For example, they simultaneously influence dry and wet combability, the feel of dry and wet hair, and shine. One skilled in the art understands the term “silicone oils” to mean several structures of organosilicon compounds. They are understood firstly as the dimethiconols.
The following commercial products are recited as examples of such products: Botanisil NU-150M (Botanigenics), Dow Corning 1-1254 Fluid, Dow Corning 2-9023 Fluid, Dow Corning 2-9026 Fluid, Ultrapure Dimethiconol (Ultra Chemical), Unisil SF-R (Universal Preserve), X-21-5619 (Shin-Etsu Chemical Co.), Abil OSW 5 (Degussa Care Specialties), ACC DL-9430 Emulsion (Taylor Chemical Company), AEC Dimethiconol & Sodium Dodecylbenzenesulfonate (A & E Connock (Perfumery & Cosmetics) Ltd.), B C Dimethiconol Emulsion 95 (Basildon Chemical Company, Ltd.), Cosmetic Fluid 1401, Cosmetic Fluid 1403, Cosmetic Fluid 1501, Cosmetic Fluid 1401DC (all the aforesaid Chemsil Silicones, Inc.), Dow Corning 1401 Fluid, Dow Corning 1403 Fluid, Dow Corning 1501 Fluid, Dow Corning 1784 HVF Emulsion, Dow Corning 9546 Silicone Elastomer Blend (all the aforesaid Dow Corning Corporation), Dub Gel S11400 (Stearinerie Dubois FiIs), HVM 4852 Emulsion (Crompton Corporation), Jeesile 6056 (Jeen International Corporation), Lubrasil, Lubrasil DS (both Guardian Laboratories), Nonychosine E, Nonychosine V (both Exsymol), SanSurf Petrolatum-25, Satin Finish (both Collaborative Laboratories, Inc.), Silatex-D30 (Cosmetic Ingredient Resources), Silsoft 148, Silsoft E-50, Silsoft E-623 (all the aforesaid Crompton Corporation), SM555, SM2725, SM2765, SM2785 (all the aforesaid GE Silicones), Taylor T-SiI CD-1, Taylor TME-4050E (all Taylor Chemical Company), TH V 148 (Crompton Corporation), Tixogel CYD-1429 (Sud-Chemie Performance Additives), Wacker-Belsil CM 1000, Wacker-Belsil CM 3092, Wacker-Belsil CM 5040, Wacker-Belsil DM 3096, Wacker-Belsil DM 3112 VP, Wacker-Belsil DM 8005 VP, Wacker-Belsil DM 60081 VP (all the aforesaid Wacker-Chemie GmbH).
Dimethicones constitute the second group of silicones that can be contained according to the present invention. They can be both linear and branched, and also cyclic or cyclic and branched.
Dimethicone copolyols constitute a further group of silicones that are suitable. Corresponding dimethicone copolyols are commercially obtainable and are marketed, for example, by the Dow Corning company under the designation Dow Corning® 5330 Fluid.
The teaching of the present invention also, of course, encompasses the fact that the dimethiconols, dimethicones, and/or dimethicone copolymers can already be present as an emulsion. The corresponding emulsion of the dimethiconols, dimethicones, and/or dimethicone copolyols can be manufactured both after manufacture of the corresponding dimethiconols, dimethicones, and/or dimethicone copolyols, from them and using usual emulsification methods known to one skilled in the art. For this purpose both cationic, anionic, nonionic, or zwitterionic surfactants and emulsifiers can be used, as auxiliaries, as adjuvants for manufacture of the corresponding emulsions. The emulsions of the dimethiconols, dimethicones, and/or dimethicone copolyols can of course also be manufactured directly by way of an emulsion polymerization method. Such methods, too, are very familiar to one skilled in the art.
If the dimethiconols, dimethicones, and/or dimethicone copolyols are used as an emulsion, the droplet size of the emulsified particles is then, according to the present invention, equal to 0.01 to 10,000 μm, preferably 0.01 to 100 μm, particularly preferably 0.01 to 20 μm, and very particularly preferably 0.01 to 10 μm. The particle size is determined using the light-scattering method.
If branched dimethiconols, dimethicones, and/or dimethicone copolyols are used, this is to be understood to mean that the branching is greater than a random branching that occurs randomly as a result of impurities in the respective monomers. “Branched” dimethiconols, dimethicones, and/or dimethicone copolyols are therefore to be understood, for purposes of the present invention, to mean that the degree of branching is greater than 0.01%. A degree of branching greater than 0.1% is preferred, and very particularly preferably it is greater than 0.5%. The degree of branching is determined from the ratio of unbranched monomers to the branching monomers, i.e. to the quantity of tri- and tetrafunctional siloxanes. Both low-branching and high-branching dimethiconols, dimethicones, and/or dimethicone copolyols can be very particularly preferred according to the present invention.
Particularly preferred silicones are aminofunctional silicones, in particular the silicones grouped under the INCI name Amodimethicone. It is therefore preferred according to the present invention if the agents according to the present invention additionally contain at least one aminofunctional silicone. These are to be understood as silicones that comprise at least one optionally substituted amino group. These silicones are referred to according to the INCI declaration as Amodimethicone, and are obtainable, for example, in the form of an emulsion as a commercial product Dow Corning® 939, or as a commercial product Dow Corning® 949, mixed with a cationic and a nonionic surfactant.
Those aminofunctional silicones that have an amine number above 0.25 meq/g, by preference above 0.3 meq/g, and particularly preferably above 0.4 meq/g are used by preference. The amine number here denotes the milliequivalent of amine per gram of the aminofunctional silicone; it can be ascertained by titration, and can also be indicated with the “mg KOH/g” unit.
The compositions contain the silicones preferably in quantities from 0.01 wt % to 15 wt %, particularly preferably from 0.05 to 2 wt %, based on the total composition.
The agent can contain as a care-providing substance of a different compound class, for example, at least one protein hydrolysate and/or one of its derivatives.
Protein hydrolysates are product mixtures obtained by the acid-, base-, or enzyme-catalyzed breakdown of proteins. The term “protein hydrolyzates” is also understood according to the present invention to mean total hydrolysates as well as individual amino acids and derivatives thereof, as well as mixtures of different amino acids. The molecular weight of the protein hydrolysates usable according to the present invention is between 75 (the molecular weight of glycine) and 200,000; the molecular weight is equal to preferably 75 to 50,000 dalton, and very particularly preferably to 75 to 20,000 dalton.
According to the present invention, protein hydrolysates of both vegetable and animal origin, or of marine or synthetic origin, can be used.
The protein hydrolysates are contained in the agents according to the present invention, for example, in concentrations from 0.01 wt % to 20 wt %, by preference from 0.05 wt % to 15 wt %, and very particularly preferably in quantities from 0.05 wt % to 5 wt %, based in each case on the total application preparation.
The composition according to the present invention can further contain at least one vitamin, provitamin, vitamin precursor, and/or one of their derivatives as a care-providing substance.
Those vitamins, provitamins, and vitamin precursors that are usually assigned to groups A, B, C, E, F, and H are preferred according to the present invention.
The compositions according to the present invention preferably contain vitamins, provitamins, and vitamin precursors from groups A, B, C, E and H. Panthenol, pantolactone, pyridoxine and derivatives thereof, as well as nicotinic acid amide and biotin, are particularly preferred.
D-panthenol is very particularly preferably used as a care-providing substance, optionally in combination with at least one of the silicone derivatives recited above.
The addition of panthenol increases the flexibility of the polymer film formed upon application of the composition. If a particularly flexible hold is desired, the agents according to the present invention can thus contain panthenol. In a preferred embodiment the compositions contain panthenol, by preference in a quantity from 0.05 to 10 wt %, particularly preferably 0.1 to 5 wt %, based in each case on the total composition.
The compositions can further contain at least one plant extract as a care-providing substance.
These extracts are usually produced by extraction of the entire plant. In individual cases, however, it may also be preferred to produce the extracts exclusively from blossoms and/or from leaves of the plant.
According to the present invention the extracts from green tea, oak bark, nettle, hamamelis, hops, henna, chamomile, burdock root, horsetail, hawthorn, linden blossoms, almond, aloe vera, pine needles, horse chestnut, sandalwood, juniper, coconut, mango, apricot, lemon, wheat, kiwi fruit, melon, orange, grapefruit, salvia, rosemary, birch, mallow, lady's-smock, wild thyme, yarrow, thyme, lemon balm, restharrow, coltsfoot, hibiscus, meristem, ginseng, and ginger root are especially preferred.
It may furthermore be preferred to use mixtures of several, in particular from two, different plant extracts in the agents according to the present invention.
Mono- or oligosaccharides can also be used as a care-providing substance in the agents according to the present invention.
Both monosaccharides and oligosaccharides, for example raw sugar, milk sugar, and raffinose, can be used. The use of monosaccharides is preferred according to the present invention. Among the monosaccharides, those compounds that contain 5 or 6 carbon atoms are in turn preferred.
Suitable pentoses and hexoses are, for example, ribose, arabinose, xylose, lyxose, allose, altrose, glucose, mannose, gulose, idose, galactose, talose, fucose and fructose. Arabinose, glucose, galactose and fructose are carbohydrates that are preferably used; it is very particularly preferred to use glucose, which is suitable both in the D-(+) or L-(−) configuration or as a racemate.
The mono- or oligosaccharides are contained in the agents according to the present invention preferably in a quantity from 0.1 to 8 wt %, particularly preferably 1 to 5 wt %, based on the total application preparation.
The agent can furthermore contain at least one lipid as a care-providing substance.
Lipids suitable according to the present invention are phospholipids, for example soy lecithin, egg lecithin, and kephalins, as well as the substances known by the INCI names Linoleamidopropyl PG-Dimonium Chloride Phosphate, Cocamidopropyl PG-Dimonium Chloride Phosphate, and Stearamidopropyl PG-Dimonium Chloride Phosphate. These are marketed, for example, by the Mona company under the commercial designations Phospholipid EFA®, Phospholipid PTC®, and Phospholipid SV®. The compositions contain the lipids preferably in quantities from 0.01 to 10 wt %, in particular 0.1 to 5 wt %, based on the total application preparation.
Oily substances are furthermore suitable as a care-providing substance.
Included among the natural and synthetic cosmetic oily substances are, for example:

- Vegetable oils. Examples of such oils are sunflower oil, olive oil, soybean oil, rapeseed oil, almond oil, jojoba oil, orange oil, wheat germ oil, peach-kernel oil, and the liquid components of coconut oil. Also suitable, however, are other triglyceride oils such as the liquid components of beef tallow, as well as synthetic triglyceride oils.
- Liquid paraffin oils, isoparaffin oils, and synthetic hydrocarbons, as well as di-n-alkyl ethers having a total of between 12 and 36 carbon atoms, in particular 12 to 24 carbon atoms, for example di-n-octyl ether, di-n-decyl ether, di-n-nonyl ether, di-n-undecyl ether, di-n-dodecyl ether, n-hexyl-n-octyl ether, n-octyl-n-decyl ether, n-decyl-n-undecyl ether, n-undecyl-n-dodecyl ether, and n-hexyl-n-undecyl ether, as well as di-tert-butyl ether, diisopentyl ether, di-3-ethyldecyl ether, tert-butyl-n-octyl ether, isopentyl-n-octyl ether, and 2-methylpentyl-n-octyl ether. The compounds 1,3-di-(2-ethylhexyl)cyclohexane (Cetiol® S) and di-n-octyl ether (Cetiol® OE), available as commercial products, may be preferred.
- Ester oils. “Ester oils” are to be understood as the esters of C₆to C₃₀fatty acids with C₂to C₃₀fatty alcohols. The monoesters of the fatty acids with alcohols having 2 to 24 carbon atoms are preferred. Particularly preferred according to the present invention are isopropyl myristate (Rilanit® IPM), isononanoic acid C16-18 alkyl ester (Cetiol® SN), 2-ethylhexyl palmitate (Cegesoft® 24), stearic acid 2-ethylhexyl ester (Cetiol® 868), cetyl oleate, glycerol tricaprylate, coconut fatty alcohol caprinate/caprylate (Cetiol® LC), n-butyl stearate, oleyl erucate (Cetiol® J 600), isopropyl palmitate (Rilanit® IPP), oleyl oleate (Cetiol®), lauric acid hexyl ester (Cetiol® A), di-n-butyl adipate (Cetiol® B), myristyl myristate (Cetiol® MM), cetearyl isononanoate (Cetiol® SN), oleic acid decyl ester (Cetiol® V).
- Dicarboxylic acid esters such as di-n-butyl adipate, di-(2-ethylhexyl) adipate, di-(2-ethylhexyl) succinate, and diisotridecyl acelaate, as well as diol esters such as ethylene glycol dioleate, ethylene glycol diisotridecanoate, propylene glycol di-(2-ethylhexanoate), propylene glycol diisostearate, propylene glycol dipelargonate, butanediol diisostearate, neopentyl glycol dicaprylate.
- Symmetrical, asymmetrical, or cyclic esters of carbonic acid with fatty alcohols, described for example in German application 197 56 454, glycerol carbonate, or dicaprylyl carbonate (Cetiol® CC).
- Fatty acid triesters of saturated and/or unsaturated linear and/or branched fatty acids with glycerol.
- Fatty acid partial glycerides, which are to be understood as monoglycerides, diglycerides, and industrial mixtures thereof. When industrial products are used, small quantities of triglycerides may still be present for manufacturing-related reasons. The partial glycerides preferably conform to formula (D4-I):

in which R¹, R²and R³, mutually independently, denote hydrogen or a linear or branched, saturated and/or unsaturated acyl residue having 6 to 22, by preference 12 to 18, carbon atoms, with the provision that at least one of these groups denotes an acyl residue and at least one of these groups denotes hydrogen. The sum (m+n+q) denotes 0 or numbers from 1 to 100, preferably 0 or 5 to 25. Preferably R¹denotes an acyl residue and R²and R³denote hydrogen, and the sum (m+n+q) is 0. Typical examples are mono- and/or diglycerides based on hexanoic acid, octanoic acid, 2-ethylhexanoic acid, decanoic acid, lauric acid, isotridecanoic acid, myristic acid, palmitic acid, palmoleic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselinic acid, linoleic acid, linolenic acid, elaeostearic acid, arachidic acid, gadoleic acid, behenic acid and erucic acid, as well as industrial mixtures thereof. Oleic acid monoglycerides are preferably used.
The quantity of the natural and synthetic cosmetic oily substances used in the agents according to the present invention is usually equal to 0.1 to 30 wt % based on the total application preparation, preferably 0.1 to 20 wt %, and in particular 0.1 to 15 wt %.
Although each of the aforesaid care-providing substances already yields a satisfactory result of itself, all embodiments in which the agent contains multiple care-providing substances, including from different groups, are also encompassed within the scope of the present invention.
The addition of a UV filter allows both the compositions themselves, and the treated fibers, to be protected from damaging influences of UV radiation. At least one UV filter is therefore preferably added to the agent. The suitable UV filters are not subject to any general restrictions in terms of their structure and their physical properties. Instead, all UV filters usable in the cosmetics sector, whose absorption maximum lies in the UVA (315 to 400 nanometers (nm)) UVB (280 to 315 nm), or UVC (<280 nm) regions, are suitable. UV filters having an absorption maximum in the UVB region, in particular in the region from approximately 280 to approximately 300 nm, are particularly preferred. The UV filters preferred according to the present invention can be selected, for example, from substituted benzophenones, p-aminobenzoic acid esters, diphenylacrylic acid esters, cinnamic acid esters, salicylic acid esters, benzimidazoles, and o-aminobenzoic acid esters.
The UV filters are contained usually in quantities from 0.01 to 5 wt %, based on the total application preparation. Quantities from 0.1 to 2.5 wt % are preferred.
In a particular embodiment, the composition according to the present invention furthermore contains one or more substantive dyes. This allows the keratinic fibers treated upon application of the agent to be not only temporarily structured, but at the same time also dyed. This can be desirable in particular when what is desired is only a temporary coloration, for example with conspicuous “fashion” colors, which can be removed again from the keratinic fibers simply by washing.
Substantive dyes are usually nitrophenylenediamines, nitroaminophenols, cationic azo dyes, nonionic azo dyes, anthraquinones, or indophenols. The compositions according to this embodiment contain the substantive dyes preferably in a quantity from 0.001 to 20 wt %, based on the total composition.
It is preferred according to the present invention that the compositions be free of oxidation dye precursor products. Oxidation dye precursor products are divided into so-called developer components and coupler components. The developer components form the actual dyes under the influence of oxidizing agents or atmospheric oxygen, with one another or by coupling with one or more coupler components.
Compositions that contain water, at least one N-acylamino acid, and at least one ionic film-forming and/or ionic setting polymer are particularly preferably suitable for storage in said containers.
The following compositions (A) to (K) are particularly preferably suitable for storage in said containers:
(A):
A composition encompassing at least one N-acylamino acid, at least one cationic surfactant, at least one cationic polymer, and water.
(B):
A composition encompassing at least one N-acylamino acid selected from at least one compound of formula (I)
in which

- R¹signifies a linear or branched, saturated or unsaturated hydrocarbon residue,
- R²denotes a hydrogen atom, a (C₁to C₄) alkyl group, or a (C₁to C₄) hydroxyalkyl group,
- R³denotes a hydrogen atom or a

group, where n=1 or 2,

- M signifies, mutually independently, a hydrogen atom or an equivalent of a monovalent or polyvalent cation,
  at least one cationic surfactant, at least one cationic polymer, and water.

(C):
A composition encompassing at least one N-acylamino acid selected from at least one compound of formula (I)
in which

- R¹signifies a linear or branched, saturated or unsaturated, hydrocarbon residue,
- R²denotes a hydrogen atom, a (C₁to C₄) alkyl group, or a (C₁to C₄) hydroxyalkyl group,
- R³denotes a hydrogen atom or a

group, where n=1 or 2,

- M signifies, mutually independently, a hydrogen atom or an equivalent of a monovalent or polyvalent cation,
  at least one cationic surfactant of a monoalkyltrimethylammonium salt of formula (Tkat1-1),

in which R1, R2, and R3 each denote a methyl group and R4 denotes a saturated, branched or unbranched alkyl residue having a chain length from 16 to 24 carbon atoms and A- signifies an anion,
at least one cationic polymer, and water.
(D):
A composition encompassing water, at least one N-acylamino acid selected from at least one compound of formula (I)
in which

- R¹signifies a linear or branched, saturated or unsaturated hydrocarbon residue,
- R²denotes a hydrogen atom, a (C₁to C₄) alkyl group, or a (C₁to C₄) hydroxyalkyl group,

- R³denotes a hydrogen atom or a group, where n=1 or 2,
- M signifies, mutually independently, a hydrogen atom or an equivalent of a monovalent or polyvalent cation,
  at least one cationic surfactant of a monoalkyltrimethylammonium salt of formula (Tkat1-1),

in which R1, R2, and R3 each denote a methyl group and R4 denotes a saturated, branched or unbranched alkyl residue having a chain length from 16 to 24 carbon atoms and A- signifies an anion,
at least one cationic polymer selected from among cationic quaternized cellulose derivatives.
(E):
A composition encompassing water, at least one N-acylamino acid selected from at least one compound of formula (I)
in which

in which R1, R2, and R3 each denote a methyl group and R4 denotes a saturated, branched or unbranched alkyl residue having a chain length from 16 to 24 carbon atoms and A- signifies an anion,
at least one cationic polymer that encompasses at least one structural unit of formula (I) and at least one structural unit of formula (2) and optionally at least one structural unit of formula (3)
in which
R¹and R⁴denote, mutually independently, a hydrogen atom or a methyl group,
A¹and A²denote, mutually independently, an ethane-1,2-diyl, propane-1,3-diyl, or butane-1,4-diyl group,
R², R³, R⁵, and R⁶denote, mutually independently, a (C₁to C₄) alkyl group,
R⁷denotes a (C₈to C₃₀) alkyl group.
(F):
A composition encompassing 0.0001 to 5.0 wt % of at least one N-acylamino acid, from 0.1 to 7.5 wt % of at least one cationic surfactant, from 0.1 wt % to 20.0 wt % of at least one cationic polymer, and water.
(G):
A composition encompassing water, 0.0001 to 5.0 wt % of at least one N-acylamino acid selected from at least one compound of formula (I)
in which

group, where n=1 or 2,

- M signifies, mutually independently, a hydrogen atom or an equivalent of a monovalent or polyvalent cation,
  0.1 to 7.5 wt % of at least one cationic surfactant, and
  0.1 wt % to 20.0 wt % of at least one cationic polymer.

(H):
A composition encompassing water, 0.0001 to 5.0 wt % of at least one N-acylamino acid selected from at least one compound of formula (I)
in which

group, where n=1 or 2,

- M signifies, mutually independently, a hydrogen atom or an equivalent of a monovalent or polyvalent cation,
  0.1 to 7.5 wt % of at least one cationic surfactant of a monoalkyltrimethylammonium salt of formula (Tkat1-1),

- in which R1, R2, and R3 each denote a methyl group and R4 denotes a saturated, branched or unbranched alkyl residue having a chain length from 12 to 24 carbon atoms and A- signifies an anion, and
  0.1 wt % to 20.0 wt % of at least one cationic polymer.

(J):
A composition encompassing water, 0.0001 to 5.0 wt % of at least one N-acylamino acid selected from at least one compound of formula (I)
in which

group, where n=1 or 2,

- M signifies, mutually independently, a hydrogen atom or an equivalent of a monovalent or polyvalent cation,
  0.1 to 7.5 wt % of at least one cationic surfactant of a monoalkyltrimethylammonium salt of formula (Tkat 1-1),

- in which R1, R2, and R3 each denote a methyl group and R4 denotes a saturated, branched or unbranched alkyl residue having a chain length from 12 to 24 carbon atoms and A- signifies an anion, and
  0.1 wt % to 20.0 wt % of at least one cationic polymer selected from among cationic quaternized cellulose derivatives.

(K):
A composition encompassing water, 0.0001 to 5.0 wt % of at least one N-acylamino acid selected from at least one compound of formula (I)
in which

group, where n=1 or 2,

in which R1, R2, and R3 each denote a methyl group and R4 denotes a saturated, branched or unbranched alkyl residue having a chain length from 12 to 24 carbon atoms and A- signifies an anion, and
0.1 wt % to 20.0 wt % of at least one cationic polymer that encompasses at least one structural unit of formula (I) and at least one structural unit of formula (2) and optionally at least one structural unit of formula (3)
in which
R¹and R⁴denote, mutually independently, a hydrogen atom or a methyl group,
A¹and A²denote, mutually independently, an ethane-1,2-diyl, propane-1,3-diyl, or butane-1,4-diyl group,
R², R³, R⁵, and R⁶denote, mutually independently, a (C₁to C₄) alkyl group,
R⁷denotes a (C₈to C₃₀) alkyl group.
Compositions (A) to (K) contain preferably at least 20 wt % water, particularly preferably at least 40 wt % water, based in each case on the weight of the composition.
Compositions (A) to (K) have a pH preferably from 2 to 11, particularly preferably between 2 and 7, very particularly preferably between 4 and 6.
Compositions (A) to (K) are preferably liquid at least at a temperature from 10 to 40° C. at 1013 mbar.
Compositions (A) to (K) preferably additionally contain at least one propellant.
All the above-recited preferred parameters of the composition (see above) are furthermore valid as preferred for compositions (A) to (K), mutatis mutandis, for the features recited therein.
It is preferred according to the present invention if the container according to the present invention completely encloses a cavity, the said composition being present in said cavity.
The containers preferably encompasses as a metallic part at least one wall made of metal at least partly enclosing the said cavity. Aluminum is particularly suitable as a metal.
It is preferred in turn to coat metallic parts of the container with a paint. This in turn applies preferably to the surface facing toward said cavity (i.e. the interior side) of the walls made of metal. Wet paints and powder paints are suitable as paints.
In the context of a particularly preferred embodiment, a powder paint is used for coating. Powder paints are applied, generally in powder form or as a melt, onto the surface to be coated of the corresponding metal part of the container, and cured there (thermally, by UV radiation, or by NIR radiation). Epoxy resins, epoxy resin/polyester mixtures, polyesters, polyester/isocyanate mixtures, acrylates are particularly suitable as powder paints usable according to the present invention.
Powder paints are based on the polymer classes of epoxy resins, epoxy resin/polyester mixtures, polyesters, polyester/isocyanate mixtures, and acrylates. The powder paints produced therefrom are respectively called epoxy resin powder paints, epoxy resin/polyester powder paints, polyester powder paints, polyurethane powder paints, and acrylate powder paints.
The underlying polymer classes as well as the crosslinking chemistry (polyurethane powder paints) are used for naming the types of powder paints. Misleading designations sometimes result from this: for example, isocyanate-cured acrylates are still called acrylates, while isocyanate-cured polyesters are referred to as polyurethanes.
Radiation-curing powder paints complete the spectrum of the aforesaid ones that crosslink entirely thermally. The near-infrared-curing NIR powder paints should in principle still be included among the thermally curing ones, since they can also be oven-cured. The UV-curing powder paints, however, are based on a purely radiation-curing binder, i.e. require UV radiation.
Fillers influence the final paint film principally in terms of its mechanical properties. i.e. with regard to elasticity and impact resistance as well as chemical resistance. It is also possible, however, thereby to control leveling and gloss (and therefore decorative aspects) within broad limits. Fillers moreover influence, inter alia, the degree of edge coverage and runoff behavior at the edges during coating, as well as the specific gravity of the powder paint and thus its spreading rate. Natural minerals such as barites, feldspars, and chalks serve predominantly as powder paint fillers.
Powder paints can in principle be manufactured in almost all color shades. Both organic and inorganic pigments are suitable for coloring them, provided they are sufficiently temperature-stable. Metallic pigments and other effect pigments can suffer from the high shear loading upon manufacture of powder paints, so they are usually incorporated in powder form after extrusion.
A further possible embodiment of the invention is characterized in that a powder paint coating of said parts of the container encompasses at least one epoxy resin powder paint. Epoxy resin powder paints, or epoxy powder paints, are powder paints in which epoxy resins or epoxidized novolacs react with various hardeners to yield a coating. The hardeners used are, depending on the application sector, amines in the broadest sense or modified cyanoguanidine, phenols such as bisphenol A or F or derivatives thereof, as well as anhydride hardeners. Epoxy resins are combined not only with these low-molecular-weight hardeners but also with acid polyester resins (see below epoxy resin/polyester powder paints).
Coatings that are produced from epoxy resin powder paints are notable for good mechanical/technological properties.
Extremely low baking temperatures are reached with phenolic hardeners. Amines, especially the dicyandiamide derivatives, result in a high crosslinking density of the powder paint. Anhydrides are preferably suitable for applications in which a high glass transition temperature of the crosslinked film is required. Anhydrides are in most cases highly irritating, and the powder preparations manufactured from them are subject to labeling requirements. They are therefore less preferred for use according to the present invention.
A further possible embodiment of the invention is characterized in that a powder paint coating of said parts of the container encompasses at least one polyester powder paint.
The classic polyester system contains triglycidyl isocyanurate (TGIC). Polyester/TGIC powder paints are baked at temperatures above 150° C., usually at approximately 190° C. Because they have little tendency to yellow, even temperatures up to 290° C. are possible, so that optionally only a few seconds at object temperature are sufficient for complete crosslinking of the paint film.
Further crosslinking systems that exist are on the one hand the systems that crosslink on the basis of a polycondensation with hydroxylalkylamide, which are notable for low baking temperatures and smooth leveling. A disadvantage, however, is a distinct tendency toward pinholing at higher layer thicknesses, resulting from the type of crosslinking (release of water). On the other hand, direct successor types to TGIC have been in use for some time. Like TGIC-containing products, these crosslink by polyaddition to the polyester resin. Release products that might cause pinholes are therefore not given off.
A preferred embodiment according to the present invention is characterized in that the said powder paint coating encompasses at least one hydroxylalkylamide-crosslinking polyester powder paint.
A further preferred embodiment of the combination according to the present invention is characterized in that the powder paint interior coating encompasses at least one polyurethane powder paint.
PU powder paints are powder paints in which polyesters carrying hydroxy groups are cured with isocyanates. In principle, however, any other polymer carrying hydroxy groups is also suitable as a binder. The isocyanates are usually capped (blocked) so that on the one hand an easily handled solid material can be used, and on the other hand to prevent a premature reaction between the binder and hardener in the powder paint. The capping agents furthermore ensure safe handling of the polyurethane powder paint, since they contain no free isocyanates. The capping agents (usually caprolactam) are released upon baking only at temperatures above 175° C., so that object temperatures of at least 180° C. are necessary for crosslinking polyurethane powder paint. Because the released capping agents account for approximately 5% of the quantity of powder paint used, attention must be paid to effective exhaust purification when using such powder paints.
Polyurethane powder paints yield weathering-resistant and chalking-resistant paint finishes that are preferably used for outdoor applications (building exterior elements, automotive components).
A further possible embodiment of the invention is characterized in that a powder paint coating of said parts of the container encompasses at least one acrylate powder paint.
Acrylate powder paints are all powder paints having an acrylate resin component in the binder; the crosslinking chemistry does not affect the nomenclature. In principle, with the acrylate powder paints as well all reactions that are capable of producing a network are conceivable as reactions, namely epoxy/hydroxy, epoxy/carboxy, and hydroxyl/isocyanate reactions.
Because of the chemical environment in acrylate resins, baking temperatures of 130° C. are sufficient for the epoxy/carboxy mechanism (unlike for the epoxy resin/polyester powder paints). In the interest of better powder storage stability and greater working speed, however, baking usually occurs at 160 to 190° C. The isocyanate-crosslinking acrylate powder paints, like the polyester-based polyurethane powder paints, require an object temperature of 180° C.
The orange-peel structure typical of powder paints is reduced to a minimum. Acrylate powder paints are appropriate in particular for coating aluminum parts or as a cover coat in the context of a multi-layer paint finish.
A further possible embodiment of the invention is characterized in that a powder paint coating of said parts of the container encompasses a hybrid powder paint made up of epoxy resins and polyester resins crosslinked with one another.
In hybrid powder paints, epoxy resins and polyester resins are crosslinked with one another.
The present invention is effective in particular for making available aerosol products encompassing at least one aerosol container that encloses a cavity with at least one metallic wall, where a composition encompassing at least one N-acylamino acid, at least one propellant, and water is arranged in the cavity.
Particularly preferably, the compositions contained according to the present invention in the said aerosol container are packaged as an aerosol foam or aerosol spray (particularly preferably as an aerosol foam).
For purposes of the invention, an “aerosol container” is understood by definition as a container whose internal pressure is higher than the external pressure of its surroundings. The agents packaged in an aerosol container can be, for example, sprayed or foamed. A “nonaerosol container” is defined, conversely to the aerosol definition, as a receptacle whose internal pressure is the same as the external pressure of its surroundings. The agents packaged in a nonaerosol container can be poured out or can be discharged by mechanical action by means of a squeeze system or pump system.
Propellants suitable according to the present invention are selected, for example, from N₂O, N₂, dimethyl ether, CO₂, air, alkanes having 3 to 5 carbon atoms such as propane, n-butane, isobutane, n-pentane, and isopentane, and mixtures thereof. Dimethyl ether, propane, n-butane, isobutane, and mixtures thereof are preferred.
In accordance with a preferred embodiment, the aforesaid alkanes, mixtures of the aforesaid alkanes, or mixtures of the aforesaid alkanes with dimethyl ether are used as the only propellant. The invention also expressly encompasses, however, the concurrent use of propellants of the fluorochlorocarbon type, but in particular the fluorocarbons.
For a given spray apparatus, the sizes of the aerosol droplets or foam bubbles, and the respective size distribution, can be adjusted by way of the quantitative ratio of propellant to the other constituents of the preparations.
The quantity of propellant used varies as a function of the specific composition of the agent, the packaging used, and the desired type of product (e.g. hair spray or hair foam). When conventional spray apparatuses are used, aerosol foam products contain the propellant preferably in quantities from 1 to 35 wt % based on the total product. Quantities from 2 to 30 wt %, in particular from 3 to 15 wt %, are particularly preferred. Aerosol sprays generally contain larger quantities of propellant. In this case the propellant is used preferably in a quantity from 20 to 98 wt % based on the total product. Quantities from 30 to 95 wt %, in particular from 30 to 65 wt %, are particularly preferred.
The aerosol products can be manufactured in usual fashion. As a rule all the constituents of the said composition, with the exception of the propellant, are introduced into a suitable pressure-tight container. The latter is then sealed with a valve. Lastly, the desired quantity of propellant is introduced using conventional techniques.
Particularly preferred embodiments of the present invention are the aerosol products (AA) to (CC):
(AA):
An aerosol product encompassing a container that encloses a cavity with at least one metallic wall, where a composition that encompasses at least one N-acylamino acid, at least one propellant, and water is arranged in the cavity.
(BB):
An aerosol product encompassing a container that encloses a cavity with at least one metallic wall coated with a paint, where a composition that encompasses at least one N-acylamino acid, at least one propellant, and water is arranged in the cavity.
(CC):
An aerosol product encompassing a container that encloses a cavity with at least one metallic wall coated with a powder paint, where a composition that encompasses at least one N-acylamino acid, at least one propellant, and water is arranged in the cavity.
It is preferred in turn if aerosol products (AA) to (CC) encompass as the composition present in the cavity the compositions characterized previously as preferred. In particular, the compositions of aerosol products (AA) to (CC) preferably encompass, besides the propellant, the parameters defined in compositions (A) to (K). The compositions of the embodiment of the third subject of the invention (see below) are furthermore suitable to a preferred extent.
The compositions according to the present invention, or the aerosol products that contain these agents, in particular aerosol hair foams or aerosol hair sprays, are notable in particular, in addition to the outstanding corrosion stability of the metallic container, for the fact that they impart a very strong, permanent hairstyle hold to treated hair even though the hair remains flexible. If the agent is packaged as a hair foam, it forms a stable, fine-pore, creamy foam that can be distributed onto the hair uniformly and without dripping.
A third subject of the invention is directed toward a preferred embodiment of the invention. This embodiment relates to preferred compositions whose corrosion effect is limited or prevented by containing the said N-acylamino acid according to the present invention. This refers to a composition for the temporary deformation of keratinic fibers, in particular human hair, encompassing

- (i) water,
- (ii) at least one N-acylamino acid,
- (iii) as a polyelectrolyte, at least one ionic film-forming and/or ionic setting polymer
- (in particular at least one cationic film-forming and/or cationic setting polymer),
- (iv) at least one propellant.

“Keratinic fibers” are understood in principle as all animal hairs, e.g. wool, horsehair, angora hair, furs, feathers, and products or textiles produced therefrom. The keratinic fibers are, however, preferably human hairs.
Preferred ionic film-forming and/or ionic setting polymers are selected from among cationic, anionic, or amphoteric polymers as well as mixtures thereof. Cationic film-forming and/or cationic setting polymers are particularly preferred according to the present invention. The cationic film-forming and/or cationic setting polymers are in turn preferably selected from at least one film-forming and/or setting polymer of the cationic polymers of the second subject of the invention.
The preferred embodiments/preferred parameters of the composition or of the components of the composition recited in the context of the first and second subject of the invention continue to be valid as preferred, mutatis mutandis, in the context of the third subject of the invention.

EXAMPLES

Compositions V1 (comparison composition) and E1 (composition according to the present invention) of Table 1 were prepared using standard manufacturing methods. Unless otherwise characterized, all quantity indications are percentages by weight. The following commercial products were used as raw materials:

Celquat® L 200 quaternized cellulose derivative (INCI name: Polyquaternium-4) (National Starch)
Luviskol VA 64 W copolymer of 60% N-vinylpyrrolidone and 40% vinyl acetate having a K value from 26 to 34 (50% active substance in water)
Gafquat® 755 N dimethylaminoethyl methacrylate/vinylpyrrolidone copolymer, quaternized with diethyl sulfate (approx. 19% solids in water; INCI name: Polyquaternium-11) (ISP)

TABLE 1

Compositions

		V1	E1

Celquat L-200	0.19	0.19
Luviskol VA 64 W	8.10	8.10
Gafquat 755 N	4.00	4.00
1,2-Propanediol	3.40	3.40
Glycerol	2.00	2.00
PEG-8 (polyethylene glycol, 400 g/mol)	1.50	1.50
Ethanol	18.40	18.40
D-panthenol	0.20	0.20
Benzophenone-4	0.10	0.10
Cetyltrimethylammonium chloride	0.30	0.30
Sodium Lauroyl Sarcosinate	—	0.03
PEG-40 Hydrogenated Castor Oil	0.40	0.40
Perfume	0.10	0.10
Lactic acid	to pH 5	to pH 5
Propane/butane	8.00	8.00
Water	to 100	to 100

The propellant-free compositions (i.e. without the propane/butane component) were placed into aerosol cans made of aluminum (Aerocan co.) having powder paint-coated interior walls (powder paint: Metlac 81200) and sealed with a poppet valve by crimping. The sealed containers were then impinged upon with the propane/butane propellant. The resulting aerosol products were stored for a period of 3 months. Once the storage time had elapsed, the aerosol cans were emptied and cut up for evaluation of corrosion phenomena. The powder-paint coating of composition E1 according to the present invention exhibited almost no bubbles caused by corrosion, while the powder-paint coating of the aerosol product of the comparison composition V1 showed considerable corrosion phenomena and considerable bubbling of the paint layer.
While at least one exemplary embodiment has been presented in the foregoing detailed description of the invention, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the invention in any way. Rather, the foregoing detailed description will provide those skilled in the art with a convenient road map for implementing an exemplary embodiment of the invention, it being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope of the invention as set forth in the appended claims and their legal equivalents.

Claims

What is claimed is:

1. A method of protecting metal from corrosion comprising:

using at least one N-acylamino acid or salts thereof to protect the metal.

2. The method of claim 1, wherein the N-acylamino acid is selected from at least one compound of formula (I)

in which

R¹signifies a linear or branched, saturated or unsaturated hydrocarbon residue,

R²denotes a hydrogen atom, a (C₁to C₄) alkyl group, or a (C₂to C₄) hydroxyalkyl group,

R³denotes a hydrogen atom or a

group, where n=1 or 2,

M signifies, mutually independently, a hydrogen atom or an equivalent of a monovalent or polyvalent cation.

3. A product comprises:

a product encompassing a container that at least in portions surrounds a cavity, wherein the container comprises at least one metallic part and wherein a composition that encompasses at least one N-acylamino acid and water is arranged in the cavity.

4. The product of claim 3, wherein the composition contains the N-acylamino acid preferably in a quantity from 0.0001 to 5.0 wt %, particularly preferably from 0.005 to 2.0 wt %, very particularly preferably from 0.005 to 1.0 wt %, based in each case on the weight of the composition.

5. The product of claim 3, wherein the composition is liquid at a temperature from 10 to 40° C. at 1013 mbar.

6. The product of claim 3, wherein the composition additionally contains at least one cationic surfactant.

7. The product of claim 3, wherein the composition additionally contains at least one cationic polymer.

8. The product of claim 3, wherein the container is an aerosol container, and the composition additionally contains at least one propellant.

9. The product of claim 3, wherein metallic parts of the container have been coated with a paint.

10. The product of claim 9, wherein the paint is a powder paint.