Oxalic Acid → M-Cresol

Participants

Reaction Steps

To a mixture of 59.3 g of the polyphenol compound obtained in Referential Example 1, 133.2 g of m-cresol, 118.0 g of p-cresol, 250 g of methyl isobutyl ketone, 37.0 g of 11% aqueous solution of oxalic acid and 85 g of 90% acetic acid was dropwise added 135.9 g of 37% aqueous solution of formaldehyde with stirring at 95° C. over a period of one hour. After the addition, the resulting mixture was allowed to react at the same temperature as above for 15 hours. The reaction mixture was washed with water and dehydrated by azeotropic distillation to obtain a solution of a novolak resin in methyl isobutyl ketone. As measured by GPC, the novolak resin had a polystyrene-converted weight average molecular weight of 4,571.

Provenance & Evidence