反应详情

温度

60 °C

Into a reactor equipped with a thermometer, an agitator, a reflux cooler and a dropping funnel were charged 108 parts of m-cresol, 108 parts of water and 1.1 parts of potassium hydroxide, and 142 parts of 37% aqueous formaldehyde solution was added dropwise to the mixture in 2 hours while agitating the resulting mixture at 60° C. After completion of the addition of the formaldehyde solution, an agitation was further continued for 3 hours at 60° C., and then the mass was cooled to obtain a homogeneous transparent resol type precondensate of m-cresol. Into another reactor having the same equipments as described above were charged 248 parts of 5-methylresorcin, 290 parts of water and 2.5 parts of oxalic acid. Then, the above obtained m-cresol-formaldehyde reaction liquid was added dropwise to the 5-methylresorcin solution in 2 hours while agitating the resulting mixture at 60° C. After completion of the addition, the resulting mixture was further agitated at 60° C. for 3 hours, and then water in the reaction liquid was removed. The residue was poured into a distillation vessel, and unreacted m-cresol and 5-methylresorcin were removed by a distillation under reduced pressure to obtain a m-cresol/5-methylresorcin/formaldehyde cocondensate.

1. customInto another reactor having
2. customThen, the above obtained
3. additionAfter completion of the addition
4. stirringthe resulting mixture was further agitated at 60° C. for 3 hours
5. customwas removed
6. additionThe residue was poured into a distillation vessel
7. customunreacted m-cresol and 5-methylresorcin were removed by a distillation under reduced pressure