Formaldehyde → Phenol-resorcinol-formaldehyde resins

HRID 2185578Notes

Reaction equation

HRID 2185578 reaction equation
[C:1]1([CH:8]=[CH:7][CH:6]=[C:4]([OH:5])[CH:3]=1)[OH:2].[C:9]1([OH:15])[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.C=O>>[C:1]1([CH:8]=[CH:7][CH:6]=[C:4]([OH:5])[CH:3]=1)[OH:2].[CH2:9]=[O:15].[C:9]1([OH:15])[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1

Participants

3

Reactant 2

HCID 712Formaldehyde2×HCID 22639633HCID 22639633, compound

Product 1

HCID 117702Phenol-resorcinol-formaldehyde resins

Procedure

A resorcinol-phenol-formaldehyde gluing system was prepared according to conventional technology by stirring 100 pans by weight of a resorcinol-phenol mixture and 20 parts by weight of an aqueous formaldehyde solution containing 40 percent by weight of formaldehyde. After said stirring the glue was applied to a surface in an amount of 400 g m2. The formaldehyde (HCHO) concentration above said surface was analysed by sucking air through a filter impregnated with dinitrophenylhydrazine, leaching the filter with acetonirile, and then analysing the extract, by means of HPLC, with regard to the content of HCHO. The volume of analysed air was 28.42 liters, which passed the filter with a flow of 0.98 liters/minute. The results of the analysis are set forth in the Table below.

Workup

  1. concentrationThe formaldehyde (HCHO) concentration above said surface
  2. filtrationfilter with acetonirile, and
  3. filtrationfilter with a flow of 0.98 liters/minute
  4. customThe results of the analysis

Sources & evidence

ORD record
ord-7f1442632efb4dde869736792e16e996
Source dataset
uspto-grants-2002_06
Patent number
US06402841B1

Reaction notes

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