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US 5,851,237 AGranted
Oxidative hair dye compositions and methods containing 1--(4-aminophenyl) pyrrolidines
OwnerJames S. Anderson, Michael Y. M. Wonginventors
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OwnerJames S. Anderson, Michael Y. M. Wonginventors
Estimating the term…
The invention provides compositions and methods for the oxidative coloring of human hair. The compositions of the invention contain as a primary dye intermediate a 1-(4-aminophenyl) pyrrolidine, or a cosmetically acceptable salt thereof. The compositions may also contain at least one other primary intermediate and conventional coupling compounds, in addition to an oxidizing agent and other components typically used in oxidative hair dye preparations. Preferred dye intermediates in the compositions of the invention include 1-(4-aminophenyl) pyrrolidine and 1-(4-amino-3-methylphenyl) pyrrolidine, or cosmetically acceptable salts thereof, which produce intense neutral colors when used in admixture with a suitable coupling agents, such as 3-aminophenol, in conventional hair dye base formulations.
In a composition for the oxidative coloring of hair, said composition containing a primary dye intermediate, a coupling compound, a cosmetically acceptable oxidizing agent selected from the group consisting of hydrogen peroxide, urea peroxide, melamine peroxide, perborates, and percarbonates, and a cosmetically acceptable vehicle, wherein said primary dye intermediate and said coupling compound form an oxidative hair dye in the presence of said cosmetically acceptable oxidizing agent, the improvement which comprises said primary dye intermediate is a 1-(4-aminophenyl) pyrrolidine, or a cosmetically acceptable salt thereof, having formula I:
An oxidative hair dye product produced by reacting, in a cosmetically acceptable vehicle and in the presence of a cosmetically acceptable oxidizing agent selected from the group consisting of hydrogen peroxide, urea peroxide, melamine peroxide, perborates, and percarbonates, a coupling compound and a 1-(4-aminophenyl) pyrrolidine, or a cosmetically acceptable salt thereof, having the formula I:
A hair dye product formed-by reacting equimolar amounts of (i) a 1-(4-aminophenyl) pyrrolidine, or a cosmetically acceptable salt thereof, having the formula I:
A method for the oxidative coloring of a keratin fiber comprising contacting the fiber with a fiber coloring effective amount of a composition containing a 1-(4-aminophenyl) pyrrolidine, or a cosmetically acceptable salt thereof, having Formula I:
Dependencies are inferred from the claim text.