Patent ID: 8901269

Claim:
A silicone composition A comprising a silicone base B capable of cross-linking or hardening by polyaddition, wherein said silicone composition comprises at least one cross-linking and attachment-promoting additive X comprising at least one polyorganosiloxane C consisting of the siloxyl units (I.1) to (I.3) having formulae: Y a ⁢ Z b 1 ⁢ SiO 4 - ( a + b ) 2 ( I ⁢ .1 ) Z c 2 ⁢ SiO 4 - c 2 ( I ⁢ .2 ) H d ⁢ Z e 3 ⁢ SiO 4 - ( d + e ) 2 ( I ⁢ .3 ) in which: a=1 or 2, b=0, 1 or 2 and a+b=1, 2 or 3; c=1, 2 or 3 d=1 or 2, e=0, 1 or 2 and d+e=1, 2 or 3 Y independently represents an epoxyfunctional hydrocarbon group; Z 1 , Z 2 and Z 3 represent, independently of each other, a monovalent hydrocarbon group selected from the group consisting of alkyl groups having from 1 to 8 carbon atoms inclusive and aryl groups said polyorganosiloxane C comprising, per molecule, at least one siloxyl unit (I.1) bearing epoxyfunctional hydrocarbon groups and at least three siloxyl units (I.3) bearing hydrogenosiloxyl groups, and the content of siloxyl units (I.1) is less than or equal to 100 mmol per 100 g of polyorganosiloxane C.