Photo curable polyester with benzoyl oxime carbonate, photo reducible dye (eosin), and a benzyl amine

Abstract

Abstract A photo-initiator system of a polyester resin is disclosed which consists of an oxime carbonate of a vicinal diketone (I), a photo-reducible dye (II) and an amine (III). This system is capable of polymerizing and curing unsaturated polyester resins by irradiation with visible light to provide coatings, adhesives, castings and fibre reinforced composites. The formulae of the ingredients of the system are <IMAGE> (I) where R' and R'' are independently alkyl, aryl or aralkyl (R' preferably being CH3 and R'' C2H5) <IMAGE> (II) wherein X=Br or I on at least 2 positions Y=H, Br, I Z=H, COOM, COOR wherein R=C1-C5 alyl. M=H, K, Na, Li, NH4 (there preferably being 4X substituents which are Br, and Z preferably being -COOM or -COOR), and wherein also 4Y substituents may be present and preferably be I) and (III) <IMAGE> wherein R1 is H, alkyl, hydroxy-substituted alkyl, aryl or aralkyl. R2 is independently alkyl, hydroxyl substituted alkyl, aryl or aralkyl. The alkyl groups are preferably C1-C5, the aryl group phenyl and the aralkyl benzyl (preferred such compounds being tribenylamine and dibenzylethanolamine).

Inventors

• 👤 Ian J. Alexander
• 👤 Roger J. Scott

Bibliographic Details