Patent ID: 8093339

Claim:
Silicone composition capable of cross-linking/curing by polyaddition, for forming a coating which is water-repellent and non-stick on a support, and comprising: (A) an alkenylated silicone component containing at least one functional silicone oil comprising at least one PolyOrganoSiloxane (POS) comprising units of formula (I.1) W a ⁢ Z b ⁢ SiO 4 - ( a + b ) 2 ( I ⁢ .1 ) in which: W represents independently a functional alkenyl group, Z represents independently a monovalent hydrocarbon group, with no unfavourable effect on the activity of the catalyst, a is 1 or 2, b is 0, 1 or 2 and a+b is comprised between 1 and 3; (B) at least one cross-linking silicone oil comprising at least one hydrogenated POS having, per molecule, at least three hydrogen atoms bound to the silicon; (C) at least one catalyst comprising at least one metal belonging to the platinum group; (D) at least one attachment promoting additive containing at least one epoxidated silicone oil comprising at least one PolyOrganoSiloxane (POS) comprising: units of formula (I.2): Y c ⁢ Z d 1 ⁢ SiO 4 - ( c + d ) 2 ( I ⁢ .2 ) optionally units of formula (I.3): Z e 2 ⁢ SiO 4 - e 2 ( I ⁢ .3 ) optionally units of formula (I.4): Y g ′ ⁢ Z h 3 ⁢ SiO 4 - ( g + h ) 2 ( I ⁢ .4 ) optionally units of formula (I.5): H i ⁢ Z j 4 ⁢ SiO 4 - ( i + j ) 2 ( I ⁢ .5 ) formulae in which: Y represents independently a linear, branched or cyclic epoxy-functional hydrocarbon group; Y′ represents independently an alkoxy-functional group, Z 1 , Z 2 , Z 3 , Z 4 are groups which correspond to the same definition as that given above for the Z groups in the legend to formula (I.1), c is 1 or 2, d is 0, 1 or 2 and c+d is comprised between 1 and 3; e is comprised between 0 and 3; g is 1 or 2, h is 0, 1 or 2 and g+h is comprised between 1 and 3; i is 1 or 2, j is 0, 1 or 2 and i+j is comprised between 1 and 3; this attachment promoting additive (D) comprising, per molecule, less than one Si—H unit; (E) optionally at least one cross-linking inhibitor; (F) optionally, an adhesion modulating system; (G) optionally, at least one diluent; (H) optionally, at least one other functional additive; wherein the attachment promoting additive (D) comprises at least one photoinitiator.