Formaldehyde → Melamine formaldehyde

HRID 465906Notes

Reaction equation

HRID 465906 reaction equation
[OH-].[Na+].N[C@H]([CH2:11][OH:12])CC1N=CNC=1.[N:13]1[C:20]([NH2:21])=[N:19][C:17]([NH2:18])=[N:16][C:14]=1[NH2:15].C=O>O>[CH2:11]=[O:12].[N:13]1[C:20]([NH2:21])=[N:19][C:17]([NH2:18])=[N:16][C:14]=1[NH2:15]

Participants

6

Reactant 4

HCID 712FormaldehydeHCID 7955MelamineHCID 14798Sodium Hydroxide2×HCID 178418337HCID 178418337, compound

Product 1

HCID 93374Melamine formaldehyde

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
60 °C

Procedure

In 100 parts of a 5% aqueous solution of pH 4.0 obtained by dissolving styrene-maleic anhydride copolymer and a small amount of sodium hydroxide, 80 parts of an oil Nisseki Hisol N-296 (a trade name mfd. by Nippon Petrochemicals Co., Ltd.) dissolving 2.5 parts of 3-diethylamino-7-chlorofluofluoran was emulsified. A melamine-formaldehyde precondensate was prepared by mixing 10 parts of melamine, 25 parts of a 37% formalin solution and 65 parts of water, making the pH of the mixture 9.0 with sodium hydroxide, and heating the mixture at 60° C. for 15 minutes to make transparent. The precondensate was added to the above-mentioned emulsion and stirred for 4 hours while maintaining at 60° C., followed by cooling to room temperature. The resulting microcapsule dispersion had a solids content of 45%.

Workup

  1. dissolution) dissolving 2.5 parts of 3-diethylamino-7-chlorofluofluoran
  2. additionThe precondensate was added to the above-mentioned emulsion
  3. temperaturewhile maintaining at 60° C.
  4. temperatureby cooling to room temperature

Sources & evidence

ORD record
ord-22263c3e1e9f474abbc6bd1d12882daf
Source dataset
uspto-grants-1992_10
Patent number
US05155087

Reaction notes

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