| abstract |
The invention provides compositions, kits and methods for treating hair for bleaching or dyeing, in particular for restoring disulfide bonds in hair. These formulations provide an improved conditioning effect on dry hair as well as a long-lasting hydration and smoothness without feeling greasy. These formulations contain a coupling agent of the formula I where A, B, C, D, R, n, p, q, r and s are as defined in the claims. For example, the binding agent can be |