Photoinitiators

Details Photoinitiators Photoinitiators

C - Chemistry, Metallurgy

07

C

C07C 69/712 (2006.01) C07C 47/575 (2006.01) C07C 49/84 (2006.01) C07C 50/34 (2006.01) C07C 69/76 (2006.01) C07C 323/22 (2006.01) C07D 295/135 (2006.01) C07D 335/16 (2006.01) C07F 9/53 (2006.01) C08K 5/06 (2006.01)

Patent

CA 2252784

A compound for use as a photoinitiator comprises a photoreactive portion and a pendent group, said photoreactive portion including an aromatic moiety and said pendent group incorporating at least one optionally-substituted poly(alkylene glycol) moiety. Preferred photoreactive portions include optionally-substituted benzophenone, thioxanthone and anthraquinone compounds substituted by a polyethylene glycol or polypropylene glycol moiety of average molecular weight in the range 150 to 900. Compounds of the type described are found to have low migration from cured films.

Cette invention concerne un composé utilisable en tant que photoamorceur, qui comporte une partie photoréactive et un groupe disponible, ladite partie photoréactive contenant une fraction aromatique et ledit groupe disponible contenant au moins une fraction de polyalkylène glycol éventuellement substitué. Les parties photoréactives préférées incluent la benzophénone éventuellement substituée, ainsi que des composés de thioxanthone et d'anthraquinone substitués par une fraction de polyéthylène glycol ou de polypropylène glycol, de poids moléculaire moyen compris entre 150 et 900. On a constaté que les composés décrits ci-dessus présentent une tendance faible à migrer des films réticulés.

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