Manufacture of high molecular weight poly(vinylamines)

Details Manufacture of high molecular weight poly(vinylamines) Manufacture of high molecular weight poly(vinylamines)

1989-07-12

1990-08-28

Lipman, Bernard

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525368, 525369, 525370, C08F 812

Patent

active

049526561

ABSTRACT:
The inverse emulsion polymerization of a monomer of the formula ##STR1## wherein R and R.sup.1 represent hydrogen of 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 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.

REFERENCES:
patent: 4018826 (1977-04-01), Gless, Jr. et al.
patent: 4217214 (1980-08-01), Dubin
patent: 4444667 (1984-04-01), Burkert et al.
patent: 4814505 (1989-03-01), Kroener et al.

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