C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/373
C08F 2/50 (2006.01) C08F 8/12 (2006.01) G03F 7/031 (2006.01)
Patent
CA 1323463
ABSTRACT A new class of polymeric or polymerisable aromatic-aliphatic ketones, the preferred of which are: 2-hydroxy-2-methyl(4-vinylpropiophenone), 2-hydroxy-2-methyl-p(1-methylvinyl)propiophenone, p-vinylbenzoyl- cyclohexanol, p-(1-methylvinyl)benzoyl-cyclohexanol and their oligo- merisation and polymerisation products, they being suitable for use as photoinitiators for the photopolymerisation of ethylenically unsaturated monomers and prepolymers. Said ketones are produced by subjecting an aromatic substrate, prefe- rably a monomer or oligomer of styrene type, to the following reaction cycle: polymerisation - acylation - alphachlorination - nucleophilic substitution with the formation of epoxyether - hydrolysis of the epoxyether; or to other reactions as modifications or alternatives to this cycle. The ketones according to the present invention have high efficiency as photoinitiators both with regard to the useful concentration to be used and with regard to the polymerisation rate.
478744
Cadona' Luciano
Carlini Carlo
Li Bassi Giuseppe
Nicora Carlo
Cadona' Luciano
Carlini Carlo
Consiglio Nazionale Delle Ricerche
Fratelli Lamberti S.p.a.
Li Bassi Giuseppe
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