Abstract: Stabilizer systems for vinyl halide resin compositions comprise(a) a liquid, oil-soluble, epoxidized vegetable oil-compatible overbased barium salt complex that is the product obtained by contacting a reaction mixture that consists essentially of a basic barium compound, an alkylphenol, and an inert liquid organic diluent, in the amounts of at least 0.75 mole of alkylphenol per mole of barium compound and 10% to 50% by weight of the diluent, based on the weight of the reaction mixture, with carbon dioxide while the reaction mixture is maintained at a temperature of at least 180.degree. C.;(b) a polyvalent metal salt component;(c) an organic phosphite component; and(d) a hydrocarbon solventIn the amounts of 0.1 part to 5 parts by weight of the polyvalent metal salt component, 0.1 part to 5 parts by weight of the organic phosphite component, and 0.1 part to 5 parts by weight of the hydrocarbon solvent per part by weight of the overbased barium salt complex.

Abstract: Cellular vinyl halide resin compositions are prepared by adding to a vinyl halide resin plastisol a chemical blowing agent, such as azodicarbonamide, and an activator for the blowing agent that contains a zinc salt and a strontium salt and heating the resulting composition at a temperature at which the blowing agent will decompose and the vinyl halide resin will fuse.