Formaldehyde → Formaldehyde melamine silicate

HRID 426517

Reaction equation

HRID 426517 reaction equation
[Si:1]([OH:5])([OH:4])([OH:3])[OH:2].[N:6]1[C:13]([NH2:14])=[N:12][C:10]([NH2:11])=[N:9][C:7]=1[NH2:8].[CH2:15]=[O:16]>>[Si:1]([OH:5])([OH:4])([OH:3])[OH:2].[N:6]1[C:13]([NH2:14])=[N:12][C:10]([NH2:11])=[N:9][C:7]=1[NH2:8].[CH2:15]=[O:16]

Participants

3

Reactant 2

HCID 712FormaldehydeHCID 69385141Melamine silicate2×

Product 1

HCID 131710831Formaldehyde melamine 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 for 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 120° C. for 30 to 90 minutes
  2. filtrationthe solution is filtered
  3. filtrationabout 5% to 15% of the said silicic acid gel is filtered out
  4. temperatureThe said solution is heated until the melamine silicate
  5. customreacts chemically with the formaldehyde

Sources & evidence

ORD record
ord-c4a3999711784b2ba729edb5cab05c40
Source dataset
uspto-grants-1979_10
Patent number
US04169930

Linked notes

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