| 摘要 |
185-P-US03564 The inverse emulsion polymerization of a monomer of the formula wherein R and R1 represent hydrogen or a C1-C4 alkyl group, using a surfactant system having a hydrophilic-lipophilic halance value from 4 to 9, an azo-type free radical initiator and certaln hydrocarbon liquids to yield a water-in-oil emulsion of a homopolymer of at least 106 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 106 average molecular weight by acid or base hydrolys,is 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. |
