| 摘要 |
<p>PURPOSE:To obtain the title ink outstanding in chemical resistance and adherability to adherends, capable of forming tough ink film by incorporating a specific ultraviolet-curable rubber copolymer with a photopolymerizable monomer, photopolymerizable oligomer and photopolymerization initiator in specified proportion. CONSTITUTION:The objective ink can be obtained by incorporating (A) 100 pts.wt. of a ultraviolet-curable rubber copolymer of the formula (R is 2-8C alkylene; R1 is H or CH3; R2 is diisocyanate residue; R3 is residue resulted by eliminating OH in dihydric alcohol; X is fraction resulted by eliminating OH in OH-contg. diene liquid rubber; l is 1-4; m is such as 1.0<m<3.0; n is 1-12) with (B) 50-500 pts.wt. of a photopolymerizable monomer [e.g., methyl (meth)acrylate], (C) 0-300 pts.wt. of a photopolymerizable oligomer (e.g., urethane acrylate oligomer), and (D) 1-30 pts.wt. of a photopolymerization initiator (e.g., benzoin).</p> |
