FIELD: chemical industry. SUBSTANCE: structurally colored amino resins are prepared by condensation of bensoquanamine with formaldehyde on heating in the presence of sulfanilic and salicylic acids at molar ratio of benzoguanamine, sulfanilic and salicyl acids of 1:0.5:1.5 respectively. Alkali and dye are then added in amount of 7-14% by weight of benzoguanamine. Dye is anionic. Ecologically pure resins of improved quality are provided. Free formaldehyde content is 0.1-0.4%). EFFECT: more efficient preparation process.
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