Clairol Incorporated

Bristol-myers Squibb Compnay

The Procter Gamble Company

Gottfried Wenke

Giuseppe Prota

Guiseppe Prota

Mu-Ill Lim

Leszek J Wolfram

Yuh-Guo Pan

Alexander C Chan

Linas R Stasaitis

Michael Y M Wong

Alice A Mayer

Ciuseppe Prota

Jia-Shen Wang

Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1):wherein X is selected from halogen and RSOwhere the halogen is preferably Cl, Br or I; R, Rand Rare each individually selected from Cto Calkyl and Cto Cmono or dihydroxyalkyl, or two of R, Rand Rtogether with the nitrogen atom to which they are attached form a Cto Csaturated or unsaturated ring optionally containing in the ring one or more additional hetero atoms selected from O, S and N atoms; Rand Rare each individually selected from Cto Calkyl, Cto Chydroxyalkyl, Cto Calkoxy, Cto Caminoalkyl or Rand Rtogether form a Cto Calkylene group; and Ris selected from Cto Calkyl and Cto Cmono or dihydroxyalkyl.

Couplers for use in oxidative hair dyeing

Oxidative hair dyeing systems are provided that are &ldquo;root seeking&rdquo;, i.e., which produce more intense initial coloration on new growth, less porous hair compared to the initial coloration produced in older, damaged, more porous hair. More equalized coloration along the shaft of hair can be obtained with the &ldquo;root seeking&rdquo; dyeing products.

Oxidation hair dyeing systems and process for providing more equalized coloration on new and old growth hair

Water soluble, cationic compounds useful as hair colorants or for the treatment of skin which are esters or amides formed by reaction of 5,6-dihydroxyindole-2-carboxylic acid or its N-substituted derivatives and a quaternary salt containing a reactive amino or hydroxyl group, and polymers from such compounds obtained by oxidative polymerization.

Synthesis of melanoquaternary compounds and their use as hair dyes and for skin treatment

A process for the preparation of 5,6-disubstituted indoles in which a 4-5-disubstituted-2,.beta.-nitrostyrene is subjected to a reductive cyclization in the presence of a water soluble dithionite salt.

Process for the preparation of substituted indoles

A process of dyeing hair by preparing and applying to the hair an aqueous reaction medium comprising an aminoethanethiol, a dihydroxybenzene and a ferricyanide or persulfate oxidizing agent, the composition optionally containing a color modifier selected from the group consisting of direct dyes, primary intermediates, couplers and mixtures thereof, and also containing a buffer to maintain the pH in the range from 2 to 11 during the oxidation reaction, and removing the aqueous reaction medium from the hair after the desired color is attained, and compositions and kits for practicing such processes.

Oxidative hair dyeing process with dihydroxybenzenes and

Water soluble, cationic products useful as hair colorants or for the treatment of skin which are esters or amides formed by reaction of melanin and a quaternary salt containing a reactive amino or hydroxyl group, as well as compositions containing them and methods of using such products to color hair or treat skin are described.

Melanoquaternary compounds and their use as hair dyes and for skin

Synthesis of quarternary melanin compounds and their use as hair dyes or

The present invention concerns improved processes for dyeing keratinous fibers especially hair on the human scalp using a two-step oxidation process for the oxidation of the melanin precursors 5,6-dihydroxyindoline (DHIN), 5,6-dihydroxyindole (DHI), and derivatives thereof such as 5,6-dihydroxyindole-2-carboxylic acid (DHICA).

Dyeing hair with melanin procursors in the presence of iodate and

The present invention is directed to the preparation of an aqueous hair dyeing composition containing an effective hair dyeing amount--at least 2 mg/ml--5,6-dihydroxyindole (DHI). An aqueous hair dyeing composition is produced by reacting under essentially anaerobic conditions dopa or a salt thereof with an alkali metal ferricyanide oxidant in an aqueous reaction medium to obtain dopachrome, and permitting the dopachrome to undergo rearrangement in the aqueous medium to form 5,6-dihydroxyindole, said rearrangement being conducted in the substantial absence of oxidant, the aqueous medium being buffered by sufficient buffering agent to maintain a pH of from about 4.5 to about 9 for the reaction medium throughout the series of reactions that take place thereafter, removing the ferrocyanide species present in the aqueous system, and lastly, charging the composition into a suitable container.

Process for the manufacture of a hair dye product containing

The specification describes water soluble, cationic products useful as hair colorants or for skin care obtained by oxidative polymerization of a 5,6-dihydroxyindole-2-quaternary amides or esters, as well as compositions containing the same, methods of using the same in compositions to color hair or treat skin and intermediates for producing the products.

Synthesis of quaternary melanin compounds and their use as hair dyes or

A process for dyeing hair by preparing and applying to the hair an aqueous reaction medium comprising a dopa species, a reactive direct dye and an oxidant, said aqueous reaction medium optionally containing at least one hair dyeing agent selected from the group consisting of primary intermediates and couplers and also containing a buffer to maintain the pH in the range from 6 to 10 during the reaction, and removing said aqueous reaction medium from the hair within about one hour following its preparation.

Hair dying methods and kits which contain a dopa species, reactive

A process of dyeing hair by preparing and applying to the hair an aqueous reaction medium buffered to a pH of from 7 to 11 with a bicarbonate or a TRIS buffer, a catalytic quantity of a cupric or ferrous salt, a catechol and a persulfate oxidizing agent and removing the composition after the desired color is attained, and compositions and kits for practicing such process. The composition may be formed by simultaneous addition of the catechol and the oxidant to the hair or by addition of the catechol followed by addition of the oxidant.

Growing community of inventors

Woodbridge, CT, United States of America

Gottfried Wenke