Formaldehyde → Resorcinol-formaldehyde resin

HRID 1989089Notes

Reaction equation

HRID 1989089 reaction equation
[CH2:1]=[O:2].[C:3]1([CH:10]=[CH:9][CH:8]=[C:6]([OH:7])[CH:5]=1)[OH:4].CO>O>[C:3]1([CH:10]=[CH:9][CH:8]=[C:6]([OH:7])[CH:5]=1)[OH:4].[CH2:1]=[O:2]

Participants

5

Reactant 3

HCID 712FormaldehydeHCID 887MethanolHCID 5054Resorcinol2×

Product 1

HCID 159980Resorcinol-formaldehyde resin

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Conditions

Temperature
77 fahrenheit

Procedure

A resorcinol/formaldehyde latent catalyst resin was prepared by mixing formaldehyde into water having a pH between about 6.5 and 8.5. Resorcinol was loaded, and the mixture is heated to 77° F. to dissolve the resorcinol. After a reaction period, methanol was added, and then water sufficient to obtain a refractive index of about 1.4644. Then, the first lime/water slurry was added and the batch heated to 122° F. under vacuum. The batch then was heated to about 210° F. and cooked under vacuum to obtain a stable Gardner-Holdt viscosity.

Workup

  1. additionwas added
  2. temperaturethe batch heated to 122° F. under vacuum
  3. temperatureThe batch then was heated to about 210° F.
  4. customto obtain a stable Gardner-Holdt viscosity

Sources & evidence

ORD record
ord-f7f941a8ec784532b96cbc38830084d2
Source dataset
uspto-grants-2010_01
Patent number
US07642333B2

Reaction notes

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