Abstract: Dispersing agents useful in a suspension polymerization process may be formed based on polyvinyl alcohols and processes discloses herein. The dispersing agent may include, for example: a polyvinyl alcohol having a degree of hydrolysis in the range from 60 to 80 mol %; an absorbance of not less than 0.3 measured at a wavelength of 320 nm with respect to a 0.1 wt % aqueous solution of the polyvinyl alcohol; a block character of remaining ester groups in the range from 0.4 to 0.5; and a cloud point in the range from 35° C. to 50° C. measured with respect to a 1 wt % aqueous solution of the polyvinyl alcohol. Carbonyl groups are theorized to be present along the polymer chain, which may be quantified by 1-H NMR spectra peaks.

Abstract: Dispersing agents useful in a suspension polymerization process may be formed based on polyvinyl alcohols and processes discloses herein. The dispersing agent may include, for example: a polyvinyl alcohol having a degree of hydrolysis in the range from 60 to 80 mol %; an absorbance of not less than 0.3 measured at a wavelength of 320 nm with respect to a 0.1 wt % aqueous solution of the polyvinyl alcohol; a block character of remaining ester groups in the range from 0.4 to 0.5; and a cloud point in the range from 35° C. to 50° C. measured with respect to a 1 wt % aqueous solution of the polyvinyl alcohol. Carbonyl groups are theorized to be present along the polymer chain, which may be quantified by 1-H NMR spectra peaks.

Abstract: A hydrophobe associative composition of an ethylenically unsaturated, water-soluble monomer such as acrylamide and an ethylenically unsaturated amphiphilic monomer such as dodecyl poly(oxyethylene).sub.10 methacrylate which is particularly effective for increasing the viscosity of brines or other aqueous media contaning salts or other electrolytes. Such copolymers are therefor useful in mobility control fluids and fracturing fluids for enhanced oil recovery and as drag reduction agents.

Abstract: This invention is a process for the preparation of N-vinyl-2-oxazolidinones which comprises pyrolyzing a N-(1-hydroxyalkyl)-2-oxazolidinone or the N-(1-hydrocarbyloxyalkyl)-2-oxaz olidinone under conditions such that the hydroxy or hydrocarbyloxy moeity is removed to prepared a N-vinyl-2-oxazolidinone.