Patent ID: 6162842
Filing Date: 2000-12-19
Classification: C09D

Abstract:
A radiation curable coating composition which is comprised of, based upon the total weight of the radiation curable coating composition, (1) about 3 weight percent to about 30 weight percent of a crosslinked polymeric resin comprised of repeat units which are derived from (a) a vinyl aromatic monomer, and (b) a crosslinking monomer, wherein the crosslinked polymeric resin contains from about 0.001 weight percent to about 5 weight percent of the crosslining monomer; (2) about 55 weight percent to about 92 weight percent of an acrylate diluting monomer, wherein the acrylate diluting monomer is selected from the group consisting of acrylated epoxy soya oil, bisphenol A epoxy diacrylate, epoxy acrylate/monomer blends, acrylated epoxy linseed oil, nonyl phenol ethoxylate, 2-phenoxy ethyl acrylate, phenol ethoxylate monoacrylate, lauryl acrylate, hexadecyl acrylate, stearyl acrylate, nonyl phenol propoxylate (2.5) monoacrylate, myristyl acrylate, 1,6-hexanediol diacrylate, bisphenol A ethoxylate diacrylate, polyethylene glycol 200 diacrylate, tripropylene glycol diacrylate, neopentyl glycol propoxylate diacrylate, neopentyl glycol ethoxylate diacrylate, aliphatic ethoxylate diacrylate, aliphatic diacrylate, dipropylene glycol diacrylate, bisphenol A ethoxylate diacrylate, 1,6-hexanediol ethoxylate diacrylate, 1,6-hexanediol propoxylate diacrylate, trimethylolpropane triacrylate, trimethylolpropane propoxylate triacrylate, trimethylolpropane ethoxylate triacrylate, aliphatic diacrylate, ditrimethylolpropane tetraacrylate, dipentaerythitol pentaacrylate, aliphatic amine acrylate, aliphatic amine acrylate, tripropylene glycol diacrylate, glyceryl propoxylate triacrylate, trimethylolpropane propoxylate triacrylate, trimethylolpropane ethoxylate triacrylate, trimethylolpropane triacrylate, ditrimethyolpropane pentaacrylate, aliphatic urethane triacrylate, aliphatic urethane diacrylate, aromatic urethane hexaacrylate, aliphatic urethane diacrylate, aliphatic urethane triacrylate, aromatic urethane diacrylate, monomethoxy trimethylolpropane ethoxylate diacrylate and tripropylene glycol diacrylate; and (3) about 5 weight percent to about 20 weight percent of a photocatalyst, wherein the photocatalyst is selected from the group consisting of benzophenone, benzil dimethyl ketal, liquid benzophenone, benzophenone derivatives, acyl substituted phosphine oxides, amino alkyl phenones, benzoate derivatives, benzoin, benzoin ethers, hydroxy alkyl phenones, titanocenes diaryliodonium salts, ferrocenium complexes, triarylsulphonium salts and triphenyl sulphonium.