Formaldehyde → Melamine formaldehyde

HRID 49562

Reaction equation

HRID 49562 reaction equation
[N:1]1[C:8]([NH2:9])=[N:7][C:5]([NH2:6])=[N:4][C:2]=1[NH2:3].O=O.[CH2:12]=[O:13].[OH-].[Na+]>O>[CH2:12]=[O:13].[N:1]1[C:8]([NH2:9])=[N:7][C:5]([NH2:6])=[N:4][C:2]=1[NH2:3]

Participants

6

Reactant 4

HCID 712FormaldehydeHCID 977OxygenHCID 7955MelamineHCID 14798Sodium Hydroxide

Product 1

HCID 93374Melamine formaldehyde

Reagents, catalysts & solvents 1

HCID 962WaterSolvent5×

Procedure

A melam-containing melamine-formaldehyde solution was prepared by dissolving 1113 g of multicrystalline melamine according to the invention (melam content=2 wt. %; oxygen-containing components=0.4 wt. %; specific surface area=1.3 m2/g; color=14 APHA) in 1589 g of a 30% formalin solution and 272 g water, the pH of which had been adjusted to 9.0 with 2 N NaOH, and then heating it to reflux temperature. After 87 minutes a water tolerance of 1.0 (g water/g resin) was reached. The water tolerance is the amount of water in gram that can be added at 20° C. to 1 g of resin before the resin turns turbid.

Workup

  1. temperatureheating it
  2. temperatureto reflux temperature
  3. additioncan be added at 20° C. to 1 g of resin before the resin

Sources & evidence

ORD record
ord-ba4de474c8114313babfa6d59b514264
Source dataset
uspto-grants-2004_03
Patent number
US06706856B2

Linked notes

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