Patent ID: 7041710

Claim:
An irradiation-curable silicone-based coating composition, consisting essentially of (a) at least one liquid polyorganosiloxane A having a viscosity of approximately 10 to 10 000 mPa·s at 25° C. and carrying a crosslinkable and/or polymerizable functional group Fa being an epoxy, alkenyl ether, oxetane or dioxolane functional group on at least one M and/or T unit and/or at least one crosslinkable and/or polymerizable functional group Fa on at least one D unit, (b) at least one liquid linear polyorganosiloxane B having a viscosity of approximately 10 to 10 000 mPa·s at 25° C. and carrying 2 crosslinkable and/or polymerizable functional groups Fb being an epoxy, alkenyl ether, oxetane or dioxolane functional group on at least one M unit, said polyorganosiloxane B being composed of units of formula (III) and terminated by units of formula (IV), of formulae: wherein: (1′) the symbols R, which are identical or different, represent: (i) a linear or branched alkyl radical comprising 1 to 8 carbon atoms optionally substituted by at least one halogen, (ii) an optionally substituted cycloalkyl radical comprising between 5 and 8 cyclic carbon atoms, (iii) an aryl radical comprising between 6 and 12 carbon atoms, optionally substituted, (iv) an aralkyl part having an alkyl part comprising between 5 and 14 carbon atoms and an aryl part comprising between 6 and 12 carbon atoms, optionally substituted on the aryl part by halogens, alkyls or alkoxyls comprising 1 to 3 carbon atoms, (v) a hydroxyl group OH or an alkoxyl group comprising from 1 to 8 carbon atoms, and (vi) a hydrogen radical, (2′) the symbols Y are identical or different and represent: (i) a group R, (ii) a crosslinkable or polymerizable organofunctional group Go being an epoxy, alkenyl ether, oxetane or dioxolane functional group, connected to the silicon of the polyorganosiloxane via a divalent radical which comprises from 2 to 20 carbon atoms and optionally having at least one heteroatom, and (iii) with at least one of the symbols Fb in one of the units (IV), and (c) an effective amount of a cationic photoinitiator composed of at least one onium borate.