Self-adhesive cationic or amphoteric polyurethanes
OwnerBeatrice Perron, Serge Restle +1inventors
InventorsBeatrice Perron, Serge Restle, Nathalie Mougin
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Abstract
The invention relates to cationic or amphoteric polyurethanes bearing at least one tertiary or quaternary amine function and having a self-adhesion value—expressed by the maximum tensile force (Fmax (in N)) recorded during the detachment by traction of two circular surfaces of 0.95 cm2, coated with the said polyurethanes—of greater than or equal to 11 N. The invention also relates to the use of these self-adhesive cationic polyurethanes, in cosmetics and in particular in styling compositions.
Claims27
Cationic or amphoteric polyurethanes bearing at least one tertiary or quaternary amine function, characterized in that they have a self-adhesion value, expressed by the maximum tensile force (Fmax (in N)), of greater or equal to 11 N.
Polyurethanes according to any one of the preceding claims, characterized in that the molar ratio of the units (a) to the units (b) is between 0.01 and 50, preferably between 0.1 and 6, better still between 0.2 and 5 and ideally between 0.3 and 5.
Polyurethanes according to any one of the preceding claims, characterized in that they also comprise one or more anionic units (d).
Cationic polyurethanes according to any one of the preceding claims, characterized in that the nonionic polymer(s) forming the units (b) have a glass transition temperature (Tg), determined by differential scanning calorimetry (DSC), of less than 0° C., preferably less than −5° C. and in particular less than −10° C.
Cationic polyurethanes according to any one of the preceding claims, characterized in that they have at least one glass transition temperature (Tg), determined by differential scanning calorimetry, of less than 20° C., preferably less than 0° C. and in particular less than −20° C.
Cosmetic composition containing, in a cosmetically acceptable aqueous medium, at least one self-adhesive cationic or amphoteric polyurethane according to any one of the preceding claims.
Dependencies are inferred from the claim text.