Urea → Melamine formaldehyde
Reaction equation
N[C:2](N)=[O:3].[N:5]1[C:12]([NH2:13])=[N:11][C:9]([NH2:10])=[N:8][C:6]=1[NH2:7]>O>[CH2:2]=[O:3].[N:5]1[C:12]([NH2:13])=[N:11][C:9]([NH2:10])=[N:8][C:6]=1[NH2:7]Participants
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
Similarly, a suitable urea-formaldehyde resin syrup may be prepared by substituting an equivalent molar quantity of urea for the melamine. The thermosetting resinous condensate of the present invention is employed in the form of an aqueous dispersion, clear or turbid, aqueous solution, or solid suspension in water of a partially-condensed, highly cross-linkable resin. The solution, dispersion or suspension are capable of being diluted up to at least twice their volume with water before any appreciable separation of the resin occurs from the water, i.e. precipitates. Thus, the condensate as employed in the present invention may be an aqueous solution similar to that produced in the synthesis of the melamine-formaldehyde condensate previously described. Alternatively, the synthesis reaction may be continued beyond the time required to produce a clear solution so that the resulting product is either a clear or turbid dispersion of the condensate in water.
Workup
- customprecipitates
Sources & evidence
- ORD record
- ord-2847c1dfe1ba4ff1b1969eca4654ef4e
- Source dataset
- uspto-grants-1978_09
- Patent number
- US04115474
Reaction notes
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