Polymeric compositions and methods of using them

Details Polymeric compositions and methods of using them Polymeric compositions and methods of using them

1985-05-16

1987-06-02

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524460, 524801, C08L 3308

Patent

active

046705015

ABSTRACT:
Water-immiscible liquids, for example oil-based drilling fluids, are thickened by the addition of an aqueous dispersion of polymeric particles that are water-insoluble, and insoluble but swellable polymer, in the water immiscible liquid. The particles have a unswollen average diameter of less than 10 .mu.m and at least 30% by weight are preferably in the range 0.5 to 5 .mu.m. Preferred polymers are formed from more than 80% by weight hydrophobic monomers, preferably alkyl (meth) acrylates, and up to 20% hydrophilic monomers, preferably unsaturated carboxylic acids, preferably acrylic acid.

REFERENCES:
patent: 3788995 (1974-01-01), Stahly
patent: 4059552 (1977-11-01), Zweigle
patent: 4134872 (1979-01-01), Lee
patent: 4138381 (1979-02-01), Chang
patent: 4432881 (1984-02-01), Evani
patent: 4459378 (1984-07-01), Ugelstad
patent: 4460732 (1984-07-01), Buscall
patent: 4530956 (1985-07-01), Ugelstad

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