Photopolymerizable ink compositions
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United States of America Patent
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-
Jun 2, 1981
Grant Date -
N/A
app pub date -
Jul 22, 1980
filing date -
Jun 11, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A photopolymerizable ink composition containing as essential ingredients (A) a high molecular diacrylate of epoxy resin made of bisphenol A and epichlorohydrin, (B) a urethane modified acrylate resin, (C) a urethane bond-free bifunctional photopolymerizable methacrylate monomer or oligomer, (D) a urethane bond-free polyfunctional photopolymerizable acrylate monomer or oligomer and (E) a photo-initiator, is curable upon short time exposure to ultra-violet irradiation and possesses the electrical, mechanical and chemical properties indispensable to a protective film for use in printed circuit boards.
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