Abstract: Cosmetic hair treatment agent free from hydrogen peroxide and/or the addition products thereof to organic and inorganic compounds and having, in a cosmetic carrier, at least one surface-active agent chosen from anionic, amphoteric and/or zwitterionic surfactants, and at least one acetylpyridinium derivative of formula (I) for improving the general condition of the fibers, for reducing hair damage in the interior of the hair and for increasing the elasticity of the hair.

Abstract: Method for lightening keratinous fibers, wherein a cosmetic carrier comprises (i) at least one oxidation agent, (ii) at least one acylpyridinium derivative of formula (I) and (iii) at least one amino acid comprising hydroxyl groups and/or the physiologically compatible salts thereof and/or the alkyl esters thereof.

Abstract: Agent for lightening keratinous fibers comprising in a cosmetic carrier (i) at least one oxidation agent, (ii) at least one acylpyridinium derivative of Formula (I) and (iii) at least one ammonium compound comprising hydroxyl groups of Formula (II).

Abstract: Cosmetic hair treatment agent free from hydrogen peroxide and/or the addition products thereof to organic and inorganic compounds and having, in a cosmetic carrier, at least one surface-active agent chosen from anionic, amphoteric and/or zwitterionic surfactants, and at least one acetylpyridinium derivative of formula (I) for improving the general condition of the fibers, for reducing hair damage in the interior of the hair and for increasing the elasticity of the hair.

Abstract: Cosmetic hair post-treatment agent for improving washing fastness of coloring processes produced on hair and for color fixing, the post-treatment agent containing, in a cosmetic carrier, at least one acetylpyridinium derivative of formula (I) wherein R1 is a C1 to C6 alkyl group, a C2 to C6 alkenyl group, a C2 to C6 hydroxyalkyl group, a C1 to C6 alkoxy-C2 to C6 alkyl group, a carboxy-C2 to C6 alkyl group, an aryl-C1 to C6 alkyl group, a heteroaryl-C1 to C6 alkyl group, an aryl group, or a heteroaryl group, and X? is a physiologically acceptable anion.

Abstract: Bleaching method for keratin fibers, using an agent comprising a bleach activator system comprising at least one cationic acylpyridinium derivative of formula (I), and hydrogen peroxide and use of agents for bleaching keratin fibers, in particular human hair, comprising at least one cationic acylpyridinium derivative, for reinforcing the bleaching capacity with concomitant improvement in the condition of the fibers.

Abstract: Cosmetic hair treatment agent comprising, in a cosmetically acceptable carrier, at least one surface-active agent chosen from cationic and/or zwitterionic surfactants, and at least one acetylpyridinium derivative of formula (I) for improving the general condition of the hair, for reducing hair damage in the interior of the hair, and for increasing the elasticity of hair.

Abstract: Use of a composition comprising hydrogen peroxide in a cosmetic vehicle allows gentle decolouring of permanently coloured, keratinous fibers which have been coloured with a specific colouring composition. The colouring composition used for colouring the fibres comprises, in a cosmetic vehicle, a combination of at least one CH-acidic compound with at least one reactive carbonyl compound. The decolouring composition contains preferably between 0% and 15% by weight of hydrogen peroxide and has the effect, in particular in a working time of 5 to 20 minutes even without the use of organic peroxo compounds and in the absence of inorganic persalts, of effective colour removal with simultaneous gentle treatment of the fibres.

Abstract: Agent for lightening keratin fibers containing in a cosmetic carrier (1) at least one cationic 2-acylpyridinium derivative of formula (I), wherein R is a C1-C6 alkyl group, a C2-C6 alkenyl group, a C2-C6 hydroxyalkyl group, a C1-C6 alkoxy C2-C6 alkyl group, a carboxy C1-C6 alkyl group, an aryl C1-C6 alkyl group, a heteroaryl C1-C6 alkyl group, a mono- or di-(C1-C6 alkyl)amino C2-C6 alkyl group, a 3-oxobutyl group, a 2-oxopropyl group, an aryl group or a heteroaryl group, R? is a C4-C4 alkyl group, a C2-C6 hydroxyalkyl group or a C1-C6 alkoxy C2-C6 alkyl group, and X? is a physiologically acceptable anion, (2) at least one alkyl ether sulfate, and (3) an oxidizing agent, especially hydrogen peroxide.

Abstract: Bleaching method for keratin fibres, using an agent comprising a bleach activator system comprising at least one cationic acylpyridinium derivative of formula (I), and hydrogen peroxide and use of agents for bleaching keratin fibres, in particular human hair, comprising at least one cationic acylpyridinium derivative, for reinforcing the bleaching capacity with concomitant improvement in the condition of the fibres.

Abstract: Agent for dyeing keratin fibers while simultaneously bleaching the keratin fibers. The agent contains, in a cosmetic carrier, at least one oxidation dye precursor and at least one cationic acylpyridinium derivative.

Abstract: Agent for bleaching keratin fibers comprising in a cosmetic carrier at least one cationic acyl pyridinium derivative of formula (I) where R is a C1-C6-alkyl group, a C2-C6-alkenyl group, a C2-C6-hydroxy alkyl group, a C1-C6-alkoxy-C2-C6-alkyl group, a carboxy-C1-C6-alkyl group, an aryl-C1-C6-alkyl group, a C1-C6-dialkylamino-C2-C6-alkyl group, a heteroaryl-C1-C6-alkyl group, a 3-oxobutyl group, a 2-oxopropyl group, an aryl group, or a heteroaryl group, R? is a C1-C4-alkyl group, a C2-C6-hydroxy alkyl group, or a C1-C6-alkoxy-C2-C6-alkyl group, X? is a physiologically compatible anion, at least one toxicologically safe co-bleaching activator and/or the physiologically compatible salt thereof, and hydrogen peroxide.

Abstract: Agent for lightening keratin fibers containing in a cosmetic carrier (1) at least one cationic 2-acylpyridinium derivative of formula (I), wherein R is a C1-C6 alkyl group, a C2-C6 alkenyl group, a C2-C6 hydroxyalkyl group, a C1-C6 alkoxy C2-C6 alkyl group, a carboxy C1-C6 alkyl group, an aryl C1-C6 alkyl group, a heteroaryl C1-C6 alkyl group, a mono- or di-(C1-C6 alkyl)amino C2-C6 alkyl group, a 3-oxobutyl group, a 2-oxopropyl group, an aryl group or a heteroaryl group, R? is a C1-C4 alkyl group, a C2-C6 hydroxyalkyl group or a C1-C6 alkoxy C2-C6 alkyl group, and X? is a physiologically acceptable anion, (2) at least one alkyl ether sulfate, and (3) an oxidizing agent, especially hydrogen peroxide.

Abstract: Agent for dyeing while simultaneously bleaching keratin fibers. The agent contains, in a cosmetic carrier, at least one oxidation dye precursor and at least one cationic 3,4-dihydorisoquinolinium derivative.

Abstract: Agent for dyeing keratin fibers while simultaneously bleaching the keratin fibers. The agent contains, in a cosmetic carrier, at least one oxidation dye precursor and at least one cationic acylpyridinium derivative.

Abstract: Agent for bleaching keratinic fibers containing hydrogen peroxide, at least one cationic 3,4-dihydroisoquinoline derivate of general structure (I)— and at least one alkanol amine of the following general structure (II)— where n is a natural number from 2 to 6. The invention further relates to use of the agent for bleaching hair and to a corresponding method.

Abstract: Agent for bleaching keratin fibers comprising in a cosmetic carrier at least one cationic acyl pyridinium derivative of formula (I) where R is a C1-C6-alkyl group, a C2-C6-alkenyl group, a C2-C6-hydroxy alkyl group, a C1-C6-alkoxy-C2-C6-alkyl group, a carboxy-C1-C6-alkyl group, an aryl-C1-C6-alkyl group, a C1-C6-dialkylamino-C2-C6-alkyl group, a heteroaryl-C1-C6-alkyl group, a 3-oxobutyl group, a 2-oxopropyl group, an aryl group, or a heteroaryl group, R? is a C1-C4-alkyl group, a C2-C6-hydroxy alkyl group, or a C1-C6-alkoxy-C2-C6-alkyl group, X? is a physiologically compatible anion, at least one toxicologically safe co-bleaching activator and/or the physiologically compatible salt thereof, and hydrogen peroxide.

Abstract: Agents for dyeing and/or lightening keratin fibers, in particular human hair, containing, relative to the weight thereof, 0.001 to 15 wt. % of at least one aldehyde of the formula (I): wherein X represents —CH(R2)—SO2—Y—R1, —CR3R4R5, or wherein Y represents —CH(CHO)— or —CH2— or a chemical bond, and wherein each of R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 independently represents —H or —CN or —F or —Cl or —Br or —I or —CHO or —NH2 or —NO2 or —CF3 or —CCl3 or —CF2CF3 or —CCl2CCl3 or an optionally substituted (C1-C6) alkyl group or a hydroxyalkyl group or a polyhydroxyalkyl group or an optionally substituted (C1-C6) alkylene group, and wherein the agent contains no oxidation dye precursors of developer and coupler type.

Abstract: The invention relates to an agent for dying fibers comprising keratin, particularly human hair, the agent comprising at least one compound of the formula: together with at least one CH-acidic compound. The invention also relates to methods for shading oxidation dyed fibers, methods for freshening up fibers, methods for making an agent for dyeing fibers and to various compositions.

Abstract: The invention relates to an agent for dying fibers comprising keratin, particularly human hair, the agent comprising at least one compound of the formula: together with at least one CH-acidic compound. The invention also relates to methods for shading oxidation dyed fibers, methods for freshening up fibers, methods for making an agent for dyeing fibers and to various compositions.