Novel sulfamide derivatives and cosmetic use thereof

Cosmetic use of a compound of formula (I)

• in which
• R1, R2, R3 and R4 represent, independently of each other
• a hydrogen atom,
• a (C1-C10)alkyl group, preferably a (C1-C6)alkyl group and better still a (C1-C4)alkyl group, optionally substituted with 1 to 5 groups chosen from —OR5, —NR6R7 and —SiR8R9R10, in which optionally 1 to 3 carbon atoms of the said (C1-C10)alkyl group may be replaced, independently of each other, with a hetero atom chosen from a nitrogen atom, a sulfur atom, an oxygen atom, a silicon atom and a sulfonyl group (—SO2—) including, for example, the group —O—SO2—NR6R7, or alternatively
• (R1 and R2) and/or (R3 and R4) may form, with the nitrogen that bears them, a 5- to 7-membered heterocycle optionally substituted with 1 to 4 hydroxyl groups and/or a group —NR6R7, the heterocycle being chosen especially from pyrrolidine, piperazine, morpholine, azepane, pyrazolidine, imidazolidine and oxazolidine, and also partially unsaturated homologues thereof, for example pyrrole, pyridine or pyrimidine derivatives, or alternatively
• (R1 and R3) or (R2 and R4) may form, with the group —N—(SO2)—N— that bears them, a 5- to 9-membered heterocycle optionally substituted with 1 to 4 hydroxyl groups and/or a group —NR6R7 and chosen especially from 1,2,5-thiadiazolidine, 1,2,6-thiadiazinane, 1,2,7-thiadiazepane, 1,2,8-thiadiazocane and 1,2,9-thiadiazonane 1,1-dioxides,
• R5, R6 and R7 represent, independently of each other,
• a hydrogen atom, or
• a (C1-C6)alkyl group, and
• R5 may also represent a group such that —OR5,ra phosphate, or sulfate group,
• R8, R9 and R10 represent, independently of each other, a (C1-C6)alkyl group, and also the cosmetically acceptable salts thereof, solvates thereof and isomers thereof, for non-therapeutic skincare.