Formaldehyde → Resorcinol-formaldehyde resin

Reaktionsgleichung

[CH2:1]=[O:2].[C:3]1([CH:10]=[CH:9][CH:8]=[C:6]([OH:7])[CH:5]=1)[OH:4].[OH-].[Na+]>>[C:3]1([CH:10]=[CH:9][CH:8]=[C:6]([OH:7])[CH:5]=1)[OH:4].[CH2:1]=[O:2]

Komponenten

Edukt 3

HCID 712Formaldehyde

HCID 5054Resorcinol2×

HCID 14798Sodium Hydroxide

Produkt 1

HCID 159980Resorcinol-formaldehyde resin

Versuchsvorschrift

Formaldehyde in aqueous solution is added to the granules of resorcinol silicoformate acid in the ratio of about 1 to 1 mols. Sodium hydroxide is added until the pH is between 10 to 12. The mixture is then heated to 50° to 85° C while agitating and the resorcinol silicoformate goes into solution. In 30 to 90 minutes the reaction is complete, thereby producing a formaldehyde resorcinol silicoformate resinous compound. This compound is soluble in acetone and other organic solvents.