Phenol-formaldehyde condensates, their preparation and their use

Details Phenol-formaldehyde condensates, their preparation and their use Phenol-formaldehyde condensates, their preparation and their use

1980-08-08

1982-04-20

Chan, Nicky

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

8589, C07C14342

Patent

active

043258905

ABSTRACT:
Polycondensates of phenols and formaldehyde which contain sulphonic acid groups and salts thereof bonded to the phenol either directly or via a methylene bridge are prepared by reacting a neutralized reaction product of phenols and sulphonating agents, which contains a mixture of the starting phenol, phenolsulphonic acid and bis-(hydroxyphenyl) sulphones, with formaldehyde and a bisulphite at a pH value of 4-8.

REFERENCES:
patent: 2171806 (1939-09-01), Russell et al.

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