Methods for activation and preparation of keratin fiber coatings, preferably color coatings

A method according to any of the preceding claims wherein the pretreatment composition comprises a PTH alkoxysilane compound comprising at least one of the PTH organo-alkoxysiloxane compound of Formula IIIA, the PTH organo-multi-dimethylsiloxanyl alkoxysilane of Formula IIIB, the disulfide or tetrasulfide dimer of Formula IIIA with PTH as thiol, the disulfide or tetrasulfide dimer of Formula IIIB with PTH as thiol, the cyclic thiol-alkoxysilane compound of Formula IV, and any combination thereof,

• (PTH—(CH2)k—(Y)l)d—(ORG)m-SiR13-n(OR)n Formula IIIA
• PTH—(CH2)k—(Si(Me)2O)o-SiR13-n(OR)n Formula IIIB
• wherein:
• Designator k is an integer of 1 to 20, preferably 1 to 12, more preferably 1 to 6;
• Designator 1 is zero or 1;
• Designator d is an integer of 1, 2 or 3;
• Designator m is zero or an integer of 1 to 6;
• Designator n is an integer of 1 to 3;
• Designator o is an integer of from 1 to 20;
• PTH comprises R3S—, OHC—, H2C═CR10—CO2—, HO—;
• R3 comprises hydrogen, cyano, alkanoyl of 2 to 10 carbons, a phenyl group, a heteroaromatic group, a phenylalkyl group or a heteroaromatic alkyl group in which heteroaromatic group is pyridyl, pyrimidinyl, pyrrolyl or thiophenyl and the alkyl group is a C1-C4 alkyl group, and R10 may be hydrogen or methyl, such that R3S— may be a thiol group (HS—) or a protected thiol group;
• R comprises a C1-C4 alkyl, preferably C1-C3 alkyl, more preferably methyl or ethyl;
• Y comprises —COO—, —OOC— (carboxyl, oxycarbonyl), ether oxygen, ether thiol, —NMe-NH—, —HNCO—, —CONH—;
• Group ORG comprises:
• (i) a divalent organic group including alkyldithioalkyl, alkyldiazoalkyl, alkylurethanylalkyl, alkylureidoalkyl, alkylcarboxylalkyl, alkylamidoalkyl, alkylesteralkyl or alkyl in which each alkyl group independently in each instance is a C1-C20 linear or branched alkyl group, preferably a linear C1-C6 alkyl group, more preferably a linear C1-C3 alkyl group such that ORG connects the left (PTH—(CH2)k—(Y)l)d section and the right —SiR13-n(OR2)n section of Formula III;
• or,
• (ii) a multivalent C1-C20 alkylenyl group of the formula
• with f as zero or an integer of 1-19 in which the moiety of Formula IIIA comprising (PTH—(CH2)k—(Y)l)d—(ORG)m becomes Formula A
• wherein two or three (PTH—(CH2)k—(Y)l)d sections are connected as D provided that when two D's are (PTH—(CH2)k—(Y)l)d sections, the third D of Formula A may be hydrogen or C1-C6 alkyl, preferably C1-C3 alkyl, more preferably methyl;
• and the dangling valence of (CH2)f— is bound to the right —SiR13-n(OR2)n section of Formula IIIA.

A method according to any of the preceding claims wherein the pretreatment composition further comprises a thiol organic compound of Formula V

• wherein
• D is (PTH—(CH2)k—(Y)l)d as defined above;
• each of the designators g is independently zero or 1;
• the group E may be a bond or a C1-C6 alkylenyl group;
• the group Ak is a carbon atom Ak0 or the structures Ak1, Ak2, Ak3, Ak4 depicted as follows wherein the dangling valences of the central carbon of Ak0, Ak1, Ak2 and Ak3 are bonded to E-D and the CH2 valence is bonded to D;
• all dangling valences of Ak4 are bound to E-D:
• and wherein PHY is an oligomer of 2 to 10 units of a C3-C8 α,ω hydroxyalkanoic acid ester having a —O—(CH2)h—O— at its carboxy terminus and a —(CH2)i—O— group at its hydroxyl terminus in which the —O—(CH2)h—O— and —(CH2)i—O— groups are bonded respectively to the CH groups and the designator h is an integer of from 2 to 4 and the designator i is an integer of from 1 to 3.

A method according to any of the preceding claims wherein the pretreatment composition further comprises the aminoorganoalkoxysilane compound comprising Formula VI:

• H2N—(CH2)m—(NH—R14—)n—[ROtMe3-tSi—O]b—(—SiMe2-O)p—[(—SiMe2-r[(CH—2—)m′—NH2]r—O]s-[A]-[(—SiMe2-O]u—(SiMe3-tORt) Formula VI
• wherein
• Each instance of R14 is independently a C1-C6 alkylenyl group;
• R may be methyl or ethyl;
• Designators m and m′ may be an integer of 1 to 3;
• Designators b, r, s, c, may be zero or 1;
• Designator n may be zero or an integer of 1-6, preferably 1-3
• Designator t may be 1 to 3;
• Designators p and u may be zero or an integer of 1 to 12;
• Group A may be a divalent group including dithio, diazo, urethanyl, ureido, carboxyl, amido, ester, or aminoethyloxycarbonyl, or a C1-C20 alkylenyl group connecting the left and right sections of the aminoorgano-alkoxysiloxane compound;
• or,
• Group A may be a multivalent C1-C20 alkylenyl group connecting two or three left sections and one right section of the aminoorganoalkoxysiloxane compound when a is 2 or 3 and b, p and s are zero;
• or,
• Group A may be a linear or branched polyethylene imine moiety of from 2 to 2000 ethylene imine units in which case, b, p, s and u are all zero and optionally the group —(SiMe3-tORt) can be replaced by —NH2;
• or,
• Group A may be a terminal group selected from C2-C8 alkylenyl(meth)acrylate or —(CH2)n—O—CH2—CHOHCH2-02C(R)═CH2 wherein R is H or CH3 and n is an integer of 2 to 8.