US 12,364,657 B2
Method for coating keratin fibers
Mathias Kurt Herrlein, Kronberg (DE); Graham Neil Mckelvey, Hesse (DE); Matija Crne, Wiesbaden (DE); Simon Paul Godfrey, Oberursel (DE); Corinne Violette Mohr, Lorsch (DE); Ingo Weber, Basel (DE); Swapna Pinakattu, Reinheim (DE); Patrick Alexander Kiefer, Darmstadt (DE); Petra Barbara Braun, Münster (DE); Andrej Gross, Darmstadt (DE); Felix Herkner, Eppstein (DE); Axel Meyer, Frankfurt am Main (DE); and Carl Uwe Oswald Ludwig Schmidt, Reinheim (DE)
Assigned to WELLA GERMANY GMBH, Darmstadt (DE)
Filed by HFC Prestige Service Germany GmbH, Darmstadt (DE)
Filed on Jun. 29, 2021, as Appl. No. 17/362,414.
Claims priority of provisional application 63/046,110, filed on Jun. 30, 2020.
Prior Publication US 2021/0401713 A1, Dec. 30, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61Q 5/06 (2006.01); A45D 19/00 (2006.01); A61K 8/58 (2006.01); A61K 8/89 (2006.01); A61Q 5/10 (2006.01); A61Q 5/12 (2006.01)
CPC A61K 8/585 (2013.01) [A45D 19/005 (2021.01); A45D 19/0066 (2021.01); A61K 8/89 (2013.01); A61Q 5/06 (2013.01); A61Q 5/065 (2013.01); A61Q 5/10 (2013.01); A61Q 5/12 (2013.01); A61K 2800/43 (2013.01); A61K 2800/4324 (2013.01); A61K 2800/884 (2013.01); A61K 2800/95 (2013.01)] 5 Claims
 
1. A method for producing a colored coating on surfaces of keratin fibers comprising
priming the keratin fibers with a Praeparatur technique to remove sebum and associated substances on the keratin fiber surfaces and deep cleaning the keratin fibers with a Fundamenta technique to remove fatty acid F layers of the keratin fiber surfaces;
applying to the primed and deep cleaned keratin fibers a pretreatment composition to form a pre-coating layer on the keratin fibers; and
applying to the pre-coating layer on the keratin fibers an aza Michael film forming composition to form a composite film of a layer of the aza Michael film forming composition overlaid on the pre-coating layer on the keratin fibers; and,
converting the composite film to the colored coating on the keratin fibers;
wherein
the pretreatment composition comprises an aqueous-alcoholic cosmetic carrier and an organosilicon compound of Formula I
H2N-L-Si(OR3)3  Formula I
wherein L is a linear divalent C I-C4 alkylene group and R3 is methyl, ethyl or propyl;
the aza Michael film forming composition comprises an aqueous-alcoholic cosmetic carrier, one or more pigments, a Michael binder comprising a silicone polymer having α,β-unsaturated alkenoyloxy groups according to Formula IV
H2C═CHCOOCH2CHOH—CH2—O—(CH2)c—SiMe2O—(SiMe2O)m—[MeSiO—(—(CH2)c—O—CH2—CHOH—CH2OOC—CH═CH2)]g(Me2SiO)p—OSiMe2-(CH2)c—O—CH2—CHOHCH2OOCCH═CH2   Formula IV
wherein c is an integer of 1 to 6, m and p in Formula IV are each independently an integer of from 5 to 100, g is zero or an integer of from 1 to 10,
and an aza linker comprising a silicone polymer, according to Formula V
M1-(SiMe2O)o(SiMe2O-A)p-M2  Formula V
wherein M1 is Me3SiO or A-SiMe2O and M2 is Si(OR3)3, o is an integer of from 2 to 100, p in Formula V is an integer of from I to 10, R3 in Formula V is methyl, ethyl or propyl and A is H2N—(R10NH)r—R11—
with R10 being a C2-C4 alkylenyl group, r being zero or an integer of 1 to 3 and R11 being a linear C2-C5 alkylenyl group;
wherein the Michael binder and aza linker are each linear and the number of Michael binder α,β-unsaturated alkenoyloxy groups is in excess of the number of aza linker H2N— groups;
wherein the Praeparatur technique comprises contacting the keratin fibers with an aqueous-alcoholic composition of an anionic surfactant selected from an alkali metal salt of a C8-C16 alkyl sulfate or a PEG 2 to PEG 20 C8-C16 alkyl sulfate or a PPG 2 to PPG 5 C8-C16 alkyl sulfate at a concentration of from 10 wt % to 30 wt % relative to the total weight of the aqueous-alcoholic composition and wherein the aqueous-alcoholic composition is free of any conditioning additive;
wherein the Fundamenta technique comprises contacting the keratin fibers with one of a cold plasma discharge of partially ionized air, oxygen and/or nitrogen, an oxidizing agent or a phase transfer tenside or any combination thereof; and,
wherein the Michael binder combines in situ with the aza linker to crosslink through the Aza-Michael addition, the Si(OR3)3 groups of the organosilicon compound of Formula I self-condense to form Si—O—Si linkages and the Si(OR3)3 groups of the organosilicon compound of Formula I and the aza linker of Formula V interact to form Si—O—Si linkages.