Formaldehyde → Melamine formaldehyde

Participants

Reaction Steps

10 gr of melamine, 25 gr of 37% formaldehyde and 65 gr of water were mixed and, after adjusting pH to 10.0, the mixture was reacted at 60° C. for 30 minutes to obtain a transparent melamine-formaldehyde precondensate. Then 100 gr of a hydrophobic oil was added thereto and the mixture was agitated and emulsified. The oil phase left slightly on the surface and even the reverse phase (W/O) was seen partly, and no good emulsion could be obtained. A microscopic observation showed precipitation of the melamine-formaldehyde resin without encapsulation of oil, and the products could not be regarded as capsules.

Provenance & Evidence