| 摘要 |
<p>PURPOSE:To provide the titled composition composed of a specific linear high- molecular cresol-novolac resin, an epoxy resin, an amine-type cure accelerator and a specific solvent, giving a cured coating film having excellent heat- resistance, chemical resistance and adhesivity to various substrate and applicable by screen printing. CONSTITUTION:The objective composition contains (A) a linear high-molecular cresol-novolac resin having a number-average molecular weight of >=1,500 and excellent solubility in solvents, and selected from (i) o-cresol-novolac resin and (ii) o-cresol/p-cresol random-copolymerized novolac resin having a molar ratio of copolymerized o-cresol/p-cresol of >=50/50, (B) an epoxy resin having >=2 epoxy groups, (C) an amin-type cure accelerator, and (D) a solvent of formula I-III (R is R' ar 1-8C alkyl; n is 1-4). The amount of the epoxy group in the component B is 0.5-1.5 equivalent per 1 equivalent of the OH group of the component A. The amounts of the components C and D are 0.01-10pts.(wt.) and 20-100pts. per 100pts. of A+B.</p> |
