Formaldehyde → Naphthalene

Participants

Reaction Steps

One hundred parts of naphthalene-formaldehyde resin and 100 parts of phenol were reacted for 2 hours at 140° C. using 0.1 parts of p-toluenesulfonic acid as a catalyst. Then, 1 part of oxalic acid and 35 parts of 37% formalin were added, and the mixture was reacted for 2.5 hours at 100° C. Then, the reaction mixture was dehydrated under reduced pressure with heating. When the temperature reached 165° C., dehydration under reduced pressure was completed to obtain a naphthalene resin modified novolak-phenolic resin having a melting point of 125° C.

Provenance & Evidence