Formaldehyde → Formaldehyde;phenol

Participants

Reaction Conditions

Reaction Steps

Phenol (1 mol) and 50% formaldehyde (0.6 mol) were charged to a reaction vessel and the temperature held below 40° C. while magnesium oxide (0.03 mol) was added and well dispersed. The temperature was then allowed to rise to 70° C. over 30 minutes and maintained at this temperature while a second charge of 60% formaldehyde (1.9 mol) was added slowly over one hour and then held for a further 30 minutes. The temperature was then lowered to 55° C. and vacuum distillation commenced until a viscosity of 85 cSt at 25° C. was obtained, the temperature was then raised once more to 80° C. and held for one hour, the resin was then cooled to 65° C. and held until the water dilutability reached 1:4 at 25° C. The product was then cooled to room temperature and discharged.

Provenance & Evidence