Compositions – Leather or fur treating
Patent
1981-05-18
1982-09-21
Guynn, Herbert B.
Compositions
Leather or fur treating
252316, 2523635, E21B 4300
Patent
active
043506011
ABSTRACT:
Viscosifiers for addition to high zinc salt brines, used as oil well workover and completion fluids, are prepared from polysaccharide gums or gelatin by treatment with formaldehyde and/or an aliphatic dialdehyde containing from 2 to 6 carbons. The treated viscosifiers have improved dispersibility and give increased viscosity effects in the brines. Preferably, the viscosifiers are prepared from carrageenan, locust bean gum, hydroxyethyl cellulose, or gelatin by treatment with a mixture of formaldehyde and glyoxal.
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Guilbeau Karl G.
McCrary Jack L.
Mosier Benjamin
Fifield D. H.
Guynn Herbert B.
The Dow Chemical Co.
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