| 摘要 |
<p>PURPOSE:To obtain the title composition which has excellent scumming resistance, is freed of a dispersion of the quality of products and a change in the quality of products with time, by mixing a reaction product of an epoxy compound of a specified MW with a compound having a photosensitive group and a COOH group with a photopolymerization initiator. CONSTITUTION:The title composition is obtained by mixing, a reaction product of a compound (A) having a number-average MW>=800 and more than one epoxy group in the molecule on the average (a phenol novolac epoxy or cresol novolac epoxy resin is particularly desirable) with a compound (B) containing a (meth)acryloyl or another photosensitive group and a COOH group [e.g., (meth)acrylic acid] with a polymerization initiator (e.g., benzil ketal photopolymerization initiator). Because this composition is based on the epoxy compound of a specified MW, it is improved in scumming resistance by the action of improving the cohesion of ink, and because conventional well-known liquid silicone compound is used, the stability of the product can be improved.</p> |
