Acidized fracturing fluids containing high molecular weight poly

Details Acidized fracturing fluids containing high molecular weight poly Acidized fracturing fluids containing high molecular weight poly

1987-06-19

1989-06-27

Schofer, Joseph L.

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...

5253282, C08F 800

Patent

active

048431184

ABSTRACT:
The inverse emulsion polymerization of a monomer of the formula ##STR1## wherein R and R.sup.1 represent hydrogen or a C.sub.1 -C.sub.4 alkyl group, using a surfactant system having a hydrophilic-lipophilic balance value from 4 to 9, an azo-type free radical initiator and certain hydrocarbon liquids to yield a water-in-oil emulsion of a homopolymer of at least 10.sup.6 average molecular weight, the emulsion having a viscosity less than 10 cps, at 15% solids, 60 rpm Brookfield and 20.degree. C.
Also disclosed is the preparation of poly(vinylamines) of at least 10.sup.6 average molecular weight by acid or base hydrolysis of the homopolymer emulsion.
Also disclosed are enhanced oil recovery compositions, drilling mud compositions, cements for drilling holes, completion fluids, acidized fracturing fluids, and wet-end paper additives containing the poly(vinylamines) and demonstrating superior properties.

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R. H. Summerville et al., "Synthesis of N-vinyl Acetamide and Preparation of Some Polymers & Copolymers", Polym. Reprints, 24-12, (1983).

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