Abstract:

The effects of three catalysts and their contents on the modification reaction of o-cresol formaldehyde epoxy acrylate with maleic anhydride were investigated.The process of UV curing of the ink prepared by the acid-modified o-cresol form aldehyde epoxy acrylate was then characterized by means of fTrIR.Moreover,four prepoly-mers with different structures were synthesized.The influences of these four prepolymers and the monomer content on the surface drying property of the ink membrane were finally analyzed.The results show that:(1)the catalytic activities of the three catalysts decrease in the order of tetramethyl ammonium chloride,triphenyl phosphorous,trie-thylamine;(2)with the appropriate content(mass fraction,the same below)of tetramethyl ammonium chloride,that is,1.0% ,the prepared ink possesses good photosensitivity,with the convemion of unsaturation bonds amoun-ting to 81.78% after a 15-second exposure;(3)the ink with the acid-modified o-cresol formaldehyde epoxy acry-late as the main body is of good surface drying property,whose resolution achieves 50 Ixm;and(4)with the mono-mer content ranging from 10% to 15%,the ink membrane possesses good surface drying property/

Key words: o-cresol form aldehyde epoxy acrylate, acid modification, photo-imageable ink, UV curing, build-up muhilayer board