Formaldehyde → (Hydroxymethyl)melamine

HRID 482179

Reaktionsgleichung

Reaktionsgleichung von HRID 482179
[CH2:1]=[O:2].[N:3]1[C:10]([NH2:11])=[N:9][C:7]([NH2:8])=[N:6][C:4]=1[NH2:5].[OH-].[Na+]>O>[CH2:1]([NH:5][C:4]1[N:6]=[C:7]([NH2:8])[N:9]=[C:10]([NH2:11])[N:3]=1)[OH:2]

Komponenten

5

Edukt 3

HCID 712FormaldehydeHCID 7955MelamineHCID 14798Sodium Hydroxide

Produkt 1

HCID 70300(Hydroxymethyl)melamine

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Reaktionsbedingungen

Temperatur
70 °C

Versuchsvorschrift

Formaldehyde (50%, 12.0 g, 0.2 mol) was added to a mixture of melamine (12.6 g, 0.1 mol) and water (40 ml) with stirring. The pH of the mixture was adjusted to 9.0-9.2 by addition of NaOH (0.5N). The mixture was heated to 70° C. and a dyestuff (Direct red 252 mg, 2000 ppm based on melamine) was added to give a colored methylolmelaminersolution. In this procedure, other dyestuffs can be used such as direct dyes, fluorescent dyes, dispersion dyes, and mixtures thereof. See Table 1.

Aufarbeitung

  1. additiona dyestuff (Direct red 252 mg, 2000 ppm based on melamine) was added
  2. customto give a colored methylolmelaminersolution

Quellen und Nachweise

ORD-Eintrag
ord-8af9f6c403b3492d89625775cedb775e
Quelldatensatz
uspto-grants-1998_08
Patentnummer
US05795507

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