Anhydrous compositions in paste form for bleaching keratin fibers

A ready-to-use composition resulting from the extemporaneous mixing of an anhydrous composition comprising at least one peroxygenated salt, at least one alkaline agent, and at least one complex of hydrogen peroxide and of at least one polymer comprising, as a monomer, at least one vinyl heterocyclic monomer, with an aqueous composition optionally comprising hydrogen peroxide.

A process for bleaching human keratin fibers, comprising mixing, immediately before use, an anhydrous composition comprising at least one peroxygenated salt, at least one alkaline agent, and at least one complex of hydrogen peroxide and of at least one polymer comprising, as a monomer, at least one vinyl heterocyclic monomer, with an aqueous composition optionally comprising hydrogen peroxide, applying the composition thus obtained to the area of the human keratin fibers to be bleached, leaving it to act for a leave-on time that is sufficient to obtain the desired bleaching, removing the bleaching mixture by rinsing with water, optionally followed by washing with a shampoo, and then optionally drying.

A multi-compartment device for bleaching human keratin fibers comprising at least two compartments, wherein one compartment comprises an anhydrous composition comprising at least one peroxygenated salt, at least one alkaline agent, and at least one complex of hydrogen peroxide and of at least one polymer comprising, as a monomer, at least one vinyl heterocyclic monomer, and a second compartment comprising an aqueous composition optionally comprising hydrogen peroxide.

A method for the preparation of a ready-to-use keratin fiber bleaching composition comprising mixing an anhydrous composition comprising at least one peroxygenated salt, at least one alkaline agent, and at least one complex of hydrogen peroxide and of at least one polymer comprising, as a monomer, at least one vinyl heterocyclic monomer, with an aqueous composition optionally comprising hydrogen peroxide.