Formaldehyde → Melamine formaldehyde

HRID 380267Notes

Reaction equation

HRID 380267 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].[OH-].[Na+]>>[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 3

HCID 712FormaldehydeHCID 7955MelamineHCID 14798Sodium Hydroxide

Product 1

HCID 93374Melamine formaldehyde

Conditions

Temperature
60 °C

Procedure

Apart from the above, melamine powder was added to an aqueous solution of 37% formaldehyde. This was controlled to have a pH of 9 with an aqueous solution of sodium hydroxide added thereto, and then heated at 60° C. for 30 minutes to obtain a melamine-formaldehyde prepolymer. The emulsion N was added to the prepolymer, and stirred at 60° C. for 10 hours. The resulting mixture was then controlled to have a pH of 7 with acetic acid added thereto. After cooled to room temperature, cyan color forming, multicore microcapsules having a photosensitivity at around 650 nm.

Workup

  1. additionadded

Sources & evidence

ORD record
ord-7216589480fb42388b2275e8136a0f91
Source dataset
uspto-grants-2001_10
Patent number
US06303259B1

Reaction notes

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