Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Reexamination Certificate
2007-03-06
2007-03-06
Elhilo, Eisa (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
C008S406000, C008S431000, C008S501000, C008S542000, C424S070200, C132S202000, C132S208000
Reexamination Certificate
active
10667958
ABSTRACT:
The present invention relates to hair care compositions comprising an oxidizing agent and chelants havinglogKCuLlogKCaLratio calculated at pH 10 of at least 3.20 wherein log KCuLis the common logarithm of the Conditional Stability Constant of said chelant with Cu2+and log KCaLis the common logarithm of the Conditional Stability Constant of said chelant with Ca2+. 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).
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Boswell Henry Drummond
Marsh Jennifer Mary
Olshavsky Michael Andrew
Park John Scott
Dressman Marianne
Elhilo Eisa
Rosnell Tara M.
Sambrook Michael J.
The Procter & Gamble & Company
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