| abstract |
Cationically crosslinkable polyorganosiloxane compositions, well suited for providing antiadhesive coatings on a wide variety of shaped substrates via the photochemical/electron beam crosslinking thereof, include a catalytically effective amount of an onium borate of an element of Groups 15 to 17 of the Periodic Table, the anionic borate moiety of which onium borate having the formula: [BXaRb]- in which a and b are integers ranging from 0 to 4 and a+b=4; the symbols X are each a halogen atom when a ranges up to 3 and an OH functional group when a ranges up to 2; and the symbols R, which may be identical or different, are each a phenyl radical substituted by at least one electron-withdrawing substituent or by at least two halogen atoms, or an aryl radical containing at least two aromatic ring members, or such aryl radical bearing at least one electron-withdrawing substituent. |