Preparation method of phenol formaldehyde resin

  title={Preparation method of phenol formaldehyde resin},
The invention discloses a preparation method of phenol formaldehyde resin. The preparation method comprises the following steps: adding phenol and formaldehyde into a reaction kettle, mixing uniformly, adding a catalyst, and heating gradually to perform polymerization reaction; when the viscosity of the reaction product is 2-3 Pa.s, stopping reacting to obtain a phenol formaldehyde resin solution; and adding carboxymethyl cellulose into the reaction kettle, mixing uniformly, and reacting for 1… CONTINUE READING

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