| 摘要 |
PURPOSE:The titled composition which is excellent in operability, can give a cured product of a high surface hardness and is suited for use in thick-film cured products such as pottings of electronic parts, comprising an ultraviolet- curable resin and an amorphous quartz powder. CONSTITUTION:100pts.wt. ultraviolet-curable resin such as urethane-modified acrylate, epoxy-modified acrylate or ester-modified acrylate is mixed with 50-200pts.wt. amorphous quartz powder having a specific surface area of 0.2-2.5m<2>/g, a particle diameter of 1-20mum, an extremely low rate of sedimention and excellent transmission to ultraviolet rays to obtain the titled composition which can cure in this state within a short time.
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