Borate photoinitiators from monoboranes

Details Borate photoinitiators from monoboranes Borate photoinitiators from monoboranes

C - Chemistry, Metallurgy

07

F

C07F 5/02 (2006.01) C07F 7/10 (2006.01) C07F 7/22 (2006.01) C07F 9/54 (2006.01) C07F 9/655 (2006.01) C08F 2/50 (2006.01) C09D 5/32 (2006.01) G03F 7/029 (2006.01)

Patent

CA 2191056

The invention relates to photopolymerizable compositions comprising as photoinitiator a borate of the formula ? or ?' Image Image , in which (?) (?') R1, R2 and R3 are, for example and independently of one another, phenyl or another aromatic hydrocarbon, with or without any heteroatoms, which radicals are unsubstituted or are substituted, or the radicals R1 and R2 form bridges to produce structures of the formulae ??, ??a or ??b Image Image Image (??) (??a) (??b) with the provisos that not more than two of the radicals R1, R2 and R3 are identical and either at least two of the radicals R1, R2 and R3 are aromatic hydrocarbon radicals or phenyl radicals which are substituted in both ortho-positions or at least one radical R1, R2 or R3 is a sterically bulky aryl radical and the remaining radicals of R1, R2 and R3 are aromatic hydrocarbon radicals or are phenyl radicals which are substituted in at least one ortho- position; R4 is, for example, phenyl or C1-C20 alkyl and G is a radical which is able to form positive ions.

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