Melamine → Melamine silicate

HRID 258527

Reaction equation

HRID 258527 reaction equation
[Si:1]([OH:5])([OH:4])([OH:3])[OH:2].[Si](=O)=O.[N:9]1[C:16]([NH2:17])=[N:15][C:13]([NH2:14])=[N:12][C:10]=1[NH2:11]>>[Si:1]([OH:5])([OH:4])([OH:3])[OH:2].[N:9]1[C:16]([NH2:17])=[N:15][C:13]([NH2:14])=[N:12][C:10]=1[NH2:11]

Participants

4

Reactant 3

HCID 7955MelamineHCID 14942Orthosilicic acidHCID 24261Silica

Product 1

HCID 69385141Melamine silicate

Procedure

Moist silicic acid gel containing equivalent to about one mol of silicon dioxide with a pH of 6.5 to 8, is mixed with one mol of melamine, heated to 70° to 260° C., while mixing, for 20 to 60 minutes, thereby producing a white, fine, granular compound, melamine silicate. The said melamine silicate is added to about 5 mols of aqueous formaldehyde, heated to 70° to 120° C. for 30 to 90 minutes; the melamine silicate goes into solution; the solution is filtered; and about 5% to 15% of the said silicic acid gel is filtered out. The said solution is heated until the melamine silicate reacts chemically with the formaldehyde to produce white granules of poly (formaldehyde melamine silicate) resin. On further heating, the said resin melts and produces a soft pliable resin.

Workup

  1. temperatureheated to 70° to 260° C.
  2. additionwhile mixing, for 20 to 60 minutes

Sources & evidence

ORD record
ord-9638359de8a4464080f53be25135bb03
Source dataset
uspto-grants-1977_07
Patent number
US04033935

Linked notes

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