Silicones for power treatment powers having surface treated with said silicones and cosmetic materials containing said powers

A non-cross linked silicone for powder treatment, being represented by formula (1):

• R1aR2bR3cSiO(4−a−b−c)/2 (1)
• wherein
• R1 groups, which are the same or different, each represent an organic group selected from alkyl groups containing 1 to 30 carbon atoms, aryl groups, aralkyl groups, fluorinated alkyl groups and organic groups represented by formula (2);
• R2 groups each represent a reactive substituent selected from a hydrogen atom, a hydroxyl group and alkoxy groups containing 1 to 6 carbon atoms, wherein said reactive substituent is attached to a silicon atom in the siloxane chain directly or via a linkage group comprising at least one carbon, oxygen or silicon atom;
• R3 groups each represent a silicone compound residue represented by formula (3);
• a is a number of from 1.0 to 2.5;
• b is a number of from 0.001 to 1.5;
• and
• c is a number of from 0.001 to 1.5;
• —CdH2d—O—(C2H4O)e(C3H6O)fR4 (2)
• wherein
• R is in each case independently a 1-30C alkyl group, an aryl group, or a fluorinated alkyl group;
• R4 is a hydrocarbon group containing 4 to 30 carbon atoms or an organic group represented by R5—(CO)—;
• R5 is a hydrocarbon group containing 1 to 30 carbon atoms;
• d is an integer of from 0 to 15;
• e is an integer of from 0 to 50;
• f is an integer of from 0 to 50;
• x is an integer of from 1 to 5;
• and
• y is an integer of from 0 to 500.