Abstract: Conductive molding compositions comprise a vinyl chloride-vinyl ether copolymer that contains as comonomer a vinyl ether having the structural formulaCH.sub.2 .dbd.CHORwherein R represents an alkyl, haloalkyl, aryl, or haloaryl radical having 1 to 18 carbon atoms, conductive carbon black particles, a stabilizer component, a lubricant component, and a plasticizer and processing aid component.

Abstract: Stable aqueous dispersions of free radical-generating polymerization initiators that are solid at temperatures above 0.degree. C. are prepared safely and efficiently by homogenizing a suspension of the initiator in an aqueous system that contains small amounts of a suspending agent and a wetting agent.

Abstract: An aqueous dispersion of a free radical-generating polymerization initiator that is a shelf-stable liquid at temperatures at which the initiator can be stored safely comprises 10% to 50% by weight of a liquid free radical-generating polymerization initiator, 0.8% to 3% by weight of a suspending agent, 0.1% to 1.0% by weight of a wetting agent, and 0 to 50% by weight of an antifreeze additive.

Abstract: Partial (2,2,4-trimethylpentane-1,3-diol monoisobutyrate) esters of polycarboxylic acids and water-soluble salts of these esters are useful in the manufacture of vinyl halide resins that have excellent optical properties.

Abstract: Vinyl chloride is removed from aqueous slurries prepared by the suspension polymerization of a monomer component that comprises vinyl chloride by heating the slurries at a temperature between 70.degree. C. and the boiling point of water at a pressure in the range of 30 mm Hg absolute to 3 atmospheres and removing the evolved vinyl chloride until the aqueous slurry contains less than 50 ppm and preferably less than 0.1 ppm of vinyl chloride, based on the weight of polymer in the slurry. The polymers that are recovered from the purified aqueous slurries contain less than 10 ppm, and in most cases less than 0.1 ppm of vinyl chloride.

Abstract: Vinyl chloride is removed from polyvinyl chloride dispersions, latexes, and slurries by sparging them with a gaseous organic compound, such as methane, while they are maintained at subatmospheric pressure.

Abstract: Vinyl chloride is removed from polyvinyl chloride dispersions and latexes by adding to them from 2% to 8% by weight of a polar water-soluble organic compound that has a boiling point between about 50.degree. C. and 150.degree. C. and sparging the resulting mixtures with a gas, such as nitrogen, while they are maintained at subatmospheric pressure.

Abstract: Vinyl chloride is removed from polyvinyl chloride dispersions, latexes, and slurries by sparging them with an inorganic gas, such as air or ammonia, while they are maintained at subatmospheric pressure.