Silicone-compatible photoinitiators
2012
The present invention provides a compound represented by the following formula (I): CCOSi* O R 2 R 3 R (I), wherein - R and R 2 each independently designates an alkyl group of 1 to 12 carbon atoms or a cycloalkyl group of 5 or 6 carbon atoms or R and R 2 form together with the carbon atom to which they are attached a cycloaliphatic ring of 5 or 6 carbon atoms, - Si* represents an organopolysiloxane residue bonded via a silicon atom of this residue to the oxygen shown in formula (I), or a silane group Si R 4 R R 6, wherein R 4, R and R 6 each independently designates an alkyl group of 1 to 12 carbon atoms, a cycloalkyl group of 5 or 6 carbon atoms or an aryl group of 6 to carbon atoms, and - R 3 designates a hydrogen atom or a group represented by the following formula (II) CCOSi** O CH 2 R 8 R 7 (II), wherein - R 7 and R 8 each independently designates an alkyl group of 1 to 12 carbon atoms or a cycloalkyl group of 5 or 6 carbon atoms or R 7 and R 8 form together with the carbon atom to which they are attached a cycloaliphatic ring of 5 or 6 carbon atoms, and - Si** represents an organopolysiloxane residue bonded via a silicon atom of this residue to the oxygen shown in formula (II), or a silane group Si R 9 R 10 R 11, wherein R 9, R 10 and R 11 each independently designates an alkyl group of 1 to 12 carbon P2012941C 20 atoms, a cycloalkyl group of 5 or 6 carbon atoms or an aryl group of 6 to 10 carbon atoms, a method to produce this compound and the use thereof as photoinitiator and/or photosensitizer.
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