Formaldehyde → Formaldehyde

HRID 2119111Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2119111
[OH-:1].[Na+].[N:3]1[C:10]([NH2:11])=[N:9][C:7]([NH2:8])=[N:6][C:4]=1[NH2:5].[CH2:12]=O>O.[Na].C(C1C=CC2C(=CC=CC=2)C=1C(C)C)(C)C.C(OCC)(=O)C>[N:3]1[C:10]([NH2:11])=[N:9][C:7]([NH2:8])=[N:6][C:4]=1[NH2:5].[CH2:12]=[O:1].[CH2:12]=[O:1].[N:3]1[C:10]([NH2:11])=[N:9][C:7]([NH2:8])=[N:6][C:4]=1[NH2:5]

Komponenten

10

Edukt 3

HCID 712FormaldehydeHCID 7955MelamineHCID 14798Sodium Hydroxide

Produkt 3

HCID 712FormaldehydeHCID 7955MelamineHCID 93374Melamine formaldehyde

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 962WaterLösungsmittel2×HCID 8857Ethyl AcetateLösungsmittelHCID 30236511,2-DiisopropylnaphthaleneLösungsmittelHCID 5360545SodiumLösungsmittel2×

Reaktionsbedingungen

Temperatur
70 °C

Versuchsvorschrift

In 95 parts of hot water at about 80° C. was dissolved 5 parts of partial sodium salt of polyvinylbenzenesulfonic acid (National Starch, VERSA, TL500, average molecular weight 500,000) with stirring in about 30 minutes, followed by cooling. The resulting aqueous solution having a pH of 2 to 3 was adjusted to pH 4.0 with a 20 wt% aqueous solution of sodium hydroxide. Separately, 4 parts of the same leuco dye as that used in heat-sensitive recording material A was dissolved in a mixture of 100 parts of diisopropylnaphthalene and 25 parts of ethyl acetate with heating to 70° C. and the resulting hydrophobic solution was dispersed in 100 parts of a 5% aqueous solution of the partial sodium salt of polyvinylbenzenesulfonic acid to give an emulsion with an average particle diameter of 4.5 μm. Separately, 6 parts of melamine, 11 parts of a 37 wt% aqueous solution of formaldehyde and 83 parts of water were mixed by stirring at 60° C. for 30 minutes to give a clear mixed aqueous solution of melamine, formaldehyde and melamine-formaldehyde precondensate. This mixed aqueous solution had a pH value of 6 to 8.

Aufarbeitung

  1. temperatureby cooling
  2. customto give an emulsion with an average particle diameter of 4.5 μm
  3. stirringby stirring at 60° C. for 30 minutes

Quellen und Nachweise

ORD-Eintrag
ord-acb537f753154527860cce160b4d6c2a
Quelldatensatz
uspto-grants-1987_07
Patentnummer
US04682194

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