Formaldehyde → Formaldehyde--4-nonylphenol (1/1)

Participants

Reaction Conditions

Reaction Steps

119 g of xylene are added to 440 g of nonylphenol, and 60 g of paraformaldehyde are metered in at 40° C. Thereafter 1.5 g of dodecylbenzenesulfonic acid are added at 35° C., after which an exothermic condensation begins. The reaction temperature is kept at 65°-70° C. for 3 hours by cooling. The mixture is then heated at 90° C. for 2 hours. In order to complete the reaction, the mixture is refluxed for 4 hours at 95°14 100° C. Thereafter, the water of reaction is distilled off, and removal of water is completed by azeotropic distillation with xylene for 6 hours. After the mixture has cooled, the nonylphenol/formaldehyde resins is obtained as the 75-80% strength solution in xylene, having a medium viscosity. This is Example b1 in the table below.

Provenance & Evidence