反应详情

Under nitrogen atmosphere, into a separable flask, 105 g of resorcinol and 5 g of catechol as monomers of a phenol compound, 0.11 g of oxalic acid (0.1%, ratio with respect to monomer) as a catalyst, 15 g of methanol as a solvent were weighed and put, and then, the content was stirred, followed by adding thereto 30 g of formalin while cooling to 40° C. or lower in an oil bath. The mixture was stirred for two hours, and then, the temperature of the oil bath was set to 100° C., and water and methanol was removed by evaporation under reduced pressure. After confirming that water and methanol were not distilled, CHN was added thereto such that the content of the novolac resin was 50%, thereby obtaining a catechol resorcinol novolac resin solution (CRN1). Further, by changing the amount of formalin to be added without changing the amounts of resorcinol and catechol to be added, CRN2 to CRN5 in total five types were produced as CRNs having different monomer content ratios and different number average molecular weight.

1. additionby adding
2. stirringThe mixture was stirred for two hours
3. customwas set to 100° C.
4. customwater and methanol was removed by evaporation under reduced pressure
5. distillationwere not distilled
6. additionCHN was added