Polyampholytes - high temperature viscosifiers for high ionic st

Details Polyampholytes - high temperature viscosifiers for high ionic st Polyampholytes - high temperature viscosifiers for high ionic st

1983-12-16

1987-01-20

Guynn, Herbert B.

Compositions

Leather or fur treating

252 851, C09K 700

Patent

active

046378820

ABSTRACT:
A new family of terpolymers based on V-vinyl-2-pyrrolidone/sodium styrene sulfonate/methacrylamidopropyltrimethylammonium chloride has been found to be an improved viscosity control additive for water-based drilling muds. The resultant muds display good viscosity characteristics, thermal stability and gel strength when formulated from the terpolymer intramolecular complex having the appropriate polymer concentration and salt level.

REFERENCES:
patent: 3924684 (1975-12-01), Tate
patent: 3927717 (1975-12-01), Tate
patent: 3994852 (1976-11-01), Adams et al.
patent: 4079011 (1978-03-01), Tate
patent: 4460627 (1984-07-01), Weaver et al.
patent: 4460758 (1984-07-01), Peiffer et al.

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