Method for polymerization of lignosulfonates

Details Method for polymerization of lignosulfonates Method for polymerization of lignosulfonates

1980-11-24

1982-06-01

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Organic additive for dye composition, dye composition...

Polymeric additive

8527, 8589, 252 87, 260124R, C09B 6700, C07G 100

Patent

active

043325890

ABSTRACT:
A method is provided for polymerizing lignosulfonate materials without undesirable viscosity build-up or gelling. The method comprises the steps of premethylolating the lignosulfonate under alkaline conditions followed by condensation of the premethylolated lignosulfonate at elevated temperatures and under neutral and acidic conditions.
The resultant products are useful in any of a variety of applications wherein the surface active properties of lignosulfonates may be desirable. The products are useful as dispersants and especially as dye dispersants.

REFERENCES:
patent: 3138555 (1964-06-01), King et al.
patent: 3470148 (1969-09-01), Allan
patent: 3600308 (1971-08-01), Allan
patent: 3864276 (1975-02-01), Benko et al.
patent: 4100155 (1978-07-01), Ashorn et al.

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