Patent ID: 8231886

Claim:
A cosmetic powder, endowed with an hydrophobic coating based on alkoxy silicones, comprising a powder phase and an hydrophobic coating phase, said hydrophobic coating phase wholly coats said powder phase and said coating phase is constituted by a compound of general formula: (RO) 3 —Si—(CH 2 ) 3 —NHCOR′ wherein R is —CH 3 or —CH 2 CH 3 ; and R′ is a substituent selected from the group consisting of: monofunctional hydroxy silicone of formula: n C 4 H 9 —Si(CH 3 ) 2 —O—[Si(CH 3 ) 2 O] n -Si(CH 3 ) 2 —C 3 H 6 —O—CH 2 —CH 2 —O— polydimethylsiloxane,α-butyl-ω[3-(2′-hydroxyethoxy)propyl]- having a molecular weight between 500 and 10,000 g/mol; monofunctional hydroxy silicone of formula: (CH 3 ) 3 Si—O—[Si(CH 3 ) 2 O] n -[CH 3 Si(CH 2 —CH 2 —O—)—O] b -Si(CH 3 ) 3 with b=1, polydimethylsiloxane,γ[3-hydroxypropyl]- having a molecular weight between 500 and 5000 g/mol; and bifunctional hydroxy silicone of formula: n C 4 H 9 —Si(CH 3 ) 2 —O—[Si(CH 3 ) 2 O] n -Si(CH 3 ) 2 —C 3 H 6 —O—CH 2 —C(CH 2 O—)CH 2 CH 3 polydimethylsiloxane,α-butyl-ω-[3-(2,2-dihydroxymethylbutoxy)propyl]- having a molecular weight between 1000 and 10,000 g/mol.