Formaldehyde → Melamine formaldehyde

HRID 2107523Notes

Reaction equation

HRID 2107523 reaction equation
[N:1]1[C:8]([NH2:9])=[N:7][C:5]([NH2:6])=[N:4][C:2]=1[NH2:3].[CH2:10]=[O:11]>O>[CH2:10]=[O:11].[N:1]1[C:8]([NH2:9])=[N:7][C:5]([NH2:6])=[N:4][C:2]=1[NH2:3]

Participants

4

Reactant 2

HCID 712FormaldehydeHCID 7955Melamine

Product 1

HCID 93374Melamine formaldehyde

Reagents, catalysts & solvents 1

HCID 962WaterSolvent3×

Procedure

220 Parts of hydrophobic liquid of Example 5 was added to 180 parts of 8.0% aqueous solution of ethylene-maleic anhydride copolymer (EMA-31 of Monsant Co.) adjusted to pH 3.5 as a water-soluble polymer and emulsification was performed in the same manner as in Example 5. Next, 14 parts of melamine, 27 parts of 37% aqueous formaldehyde solution and 133 parts of water were mixed, followed by dissolution with heating at pH 9.0 to obtain a melamine-formaldehyde pre-condensate. This pre-condensate was added to said emulsion, followed by stirring at 70° C. for 2 hours to complete the reaction. Using the resulting microcapsule slurry, an over sheet (CB sheet) for carobonless pressure-sensitive copy paper was prepared in the same manner as in Example 5.

Workup

  1. dissolutionfollowed by dissolution
  2. temperaturewith heating at pH 9.0

Sources & evidence

ORD record
ord-404d3863e1444accb8d561bbe752cc78
Source dataset
uspto-grants-1990_06
Patent number
US04935172

Reaction notes

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