Formaldehyde → Melamine formaldehyde

HRID 1031842Notes

Reaction equation

HRID 1031842 reaction equation
[N:1]1[C:8]([NH2:9])=[N:7][C:5]([NH2:6])=[N:4][C:2]=1[NH2:3].C=O.N[C:13](N)=[O:14].[OH-].[Na+]>O>[N:1]1[C:8]([NH2:9])=[N:7][C:5]([NH2:6])=[N:4][C:2]=1[NH2:3].[CH2:13]=[O:14]

Participants

6

Reactant 4

HCID 712Formaldehyde2×HCID 1176UreaHCID 7955MelamineHCID 14798Sodium Hydroxide

Product 1

HCID 93374Melamine formaldehyde

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
65 °C

Procedure

A melamine/formalin prepolymer solution obtained by heating a mixture of 44 parts of distilled water, 3.9 parts of melamine, and 6.5 parts of 37% formaldehyde solution (formalin) to 60° C. for 30 minutes was added to the emulsified dispersions described above and the pH thereof was adjusted to 6.0. Then, the temperature of the mixture was raised to 65° C., and the mixture was stirred for 3 hours to perform reaction. To the reaction mixture was added 7.7 parts of urea to treat remaining formalin and then the pH thereof was adjusted to 9.5 with an aqueous solution of sodium hydroxide to provide a dispersion of melamine/formalin resin microcapsules having particle size of 3.5 μm.

Workup

  1. temperatureby heating
  2. additionwas added to the emulsified dispersions
  3. customreaction
  4. additionto treat

Sources & evidence

ORD record
ord-105e66476c0e4948b7fc4920c69befef
Source dataset
uspto-grants-1990_09
Patent number
US04956254

Reaction notes

Loading…