Formaldehyde → Melamine formaldehyde

Participants

Reaction Steps

If it is desirable to form a second shell, an aqueous solution of melamine and formaldehyde or a precondensate is added to the above microcapsule dispersion. The melamine-formaldehyde shell is formed by raising the temperature of the resulting mixture at neutral or acidic pH, e.g. pH of 7 or less. The temperature of encapsulation is maintained at about 20 to 95° C., preferably about 30 to 85° C., ad more preferably about 45 to 80° C.

Provenance & Evidence