Formaldehyde → HCID 86758556, compound

Participants

Reaction Conditions

Reaction Steps

A 4-necked flask equipped with a stirrer, a reflux condenser and a thermocouple was charged with 40.5 parts of urea, 29.6 parts of benzoguanamine, 100 parts of formalin (formaldehyde content 37%) and 110 parts of water. The pH of the mixture was adjusted to 7.5 with a 10% aqueous solution of sodium carbonate. While agitating this mixture, its temperature was raised to 75° C., and its reaction was carried out for 4 hours to obtain an aqueous liquid of a soluble and fusible urea-benzoguanamine-formaldehyde prepolymer. The prepolymer thus obtained is cooled to 50° C. and rapidly mixed with 100 part of methanol which has also been warmed to 50° C. The product is mixed with 30 parts of the water solution of 1.62 parts of fluorescent dye Basic Yellow 40, 0.39 parts of Basonyl Red 485 and 0.21 parts of Basonyl Red 560 with preliminary adjustment of pH to 7.5 with 10% aqueous solution of sodium carbonate, at temperature 40-50° C.

Provenance & Evidence