| 摘要 |
<p>The present invention relates to hair care compositions comprising an oxidizing agent and chelants having a log KCuL/log KCaL ratio calculated at pH 10 of at least 3.20 wherein log KCuL is the common logarithm of the Conditional Stability Constant of said chelant with Cu<2+> and log KCaL is the common logarithm of the Conditional Stability Constant of said chelant with Ca<2+>. Suitable chelants are diamine-N,N'-dipolyacids or monoamine monoamide-N,N'-dipolyacids. The compositions according to the present invention contribute to reducing the oxidative damage sustained by a keratinous fiber such as hair during bleaching, dyeing, perming or other oxidative treatments. Especially preferred diamine dipolyacid is ethylenediamine-N,N'-disuccinic acid (EDDS).</p> |
