Patent ID: 7273658

Claim:
A crosslinking agent (I.2), for use in a silicone composition capable of crosslinking by polyaddition in the presence of a metal catalyst to form a water-repellent and release coating for a fibrous or nonfibrous support, of at least one silicone oil comprising at least one hydrogenated (optionally linear) PolyOrganoSiloxane (POS) exhibiting, per molecule, at least three hydrogen atoms bonded to silicon atoms, and having the following mean formula: M α M′ β D γ D′ δ with M=(R 1 ) 3 SiO 1/2 M′=H a (R 1 ) b SiO 1/2 , a+b=3, a=1, 2 or 3, b=0 to 3 D=(R 2 ) 2 SiO 2/2 D′=HR 3 SiO 2/2 0≦α≦2 0<β≦2 0<γ 0<δ and with: 0<γ/δ≦0.4, 20≦(β/δ)×1000≦60, and wherein R 1 ,R 2 and R 3 are alkyl groups having from 1 to 8 carbon atoms, the POS having a dynamic viscosity η at 25° C. of less than or equal to 1500 mPa·s.