Formaldehyde → Formaldehyde melamine silicate

HRID 258530

Reaction equation

HRID 258530 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].S(=O)(=O)(O)O>>[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

4

Reactant 3

HCID 712FormaldehydeHCID 1118Sulfuric AcidHCID 69385141Melamine silicate

Product 1

HCID 131710831Formaldehyde melamine silicate

Procedure

The said melamine silicate as produced in Example VII is added to about 2 mols of formaldehyde in an aqueous solution and dilute sulfuric acid is added until the pH is 4 to 5.5, then heated to 70° to 100° , while agitating, for 15 to 60 minutes, thereby producing a white, solid resin, poly (formaldehyde melamine silicate). The said resin is not soluble in acetic acid and is resistent to strong acids and alkalis. On heating, the said resin softens very little and is destroyed before it will melt.

Workup

  1. additionis added until the pH is 4 to 5.5
  2. temperatureheated to 70° to 100°

Sources & evidence

ORD record
ord-32daf0e4646d47c6af7b5c1bd78bd847
Source dataset
uspto-grants-1977_07
Patent number
US04033935

Linked notes

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