Abstract: High concentration pelletized additive concentration or polymer stabilization agent or blends, and their preparations, used in various polymerization processes to enhance stability.

Abstract: Ultra-fine sodium bicarbonate powder (mean particle size less than 5 microns) is produced by the mixing and reaction under agitation at control temperatures of solutions of ammonium bicarbonate and sodium chloride. Precipitated sodium bicarbonate is separated by filtration as a slurry which is dried to produce ultra-fine sodium bicarbonate. Ultra-fine sodium bicarbonate produced by this method also exhibits a narrow particle size distribution which is advantageous in blowing agents for thermoplastic resins, to produce a foamed resin with small cells of a narrow size distribution.

Abstract: A method is described for preparing liquid concentrates of additives for incorporation in polymers, particularly polymers prepared in solution or slurry phase polymerization media. Additive concentrates according to the invention are characterized by a finer dispersion than would result from the direct addition of particulate or granular additives to the same liquid solvent.

Abstract: A method is described for preparing liquid concentrates of additives for incorporation in polymers, particularly polymers prepared in solution or slurry phase polymerization media. Additive concentrates according to the invention are characterized by a finer dispersion than would result from the direct addition of particulate or granular additives to the same liquid solvent.

Abstract: Ultra-fine sodium bicarbonate powder (mean particle size less than 5 microns) is produced by the mixing and reaction under agitation at control temperatures of solutions of ammonium bicarbonate and sodium chloride. Precipitated sodium bicarbonate is separated by filtration as a slurry which is dried to produce ultra-fine sodium bicarbonate. Ultra-fine sodium bicarbonate produced by this method also exhibits a narrow particle size distribution which is advantageous in blowing agents for thermoplastic resins, to produce a foamed resin with small cells of a narrow size distribution.

Abstract: Foamed film compositions using chemical blowing agents and produced by continuous blown film extrusion or cast film extrusion of polymer foams. The composition has small cell size and is suitable for the production of thin film articles. The articles may be monolayer or multilayered structures.

Abstract: High concentration pelletized additive concentration or polymer stabilization agent or blends, and their preparations, used in various polymerization processes to enhance stability.

Abstract: A method is described for preparing liquid concentrates of additives for incorporation in polymers, particularly polymers prepared in solution or slurry phase polymerization media. Additive concentrates according to the invention are characterized by a finer dispersion than would result from the direct addition of particulate or granular additives to the same liquid solvent.

Abstract: Ultra-fine sodium bicarbonate powder (mean particle size less than 5 microns) is produced by the mixing and reaction under agitation at control temperatures of solutions of ammonium bicarbonate and sodium chloride. Precipitated sodium bicarbonate is separated by filtration as a slurry which is dried to produce ultra-fine sodium bicarbonate. Ultra-fine sodium bicarbonate produced by this method also exhibits a narrow particle size distribution which is advantageous in blowing agents for thermoplastic resins, to produce a foamed resin with small cells of a narrow size distribution.

Abstract: Novel molding compositions consisting essentially of a mixture of a skin-forming component and a foam core-foaming component physically dry-blended together. The skin-forming component comprises two distinct phases blended together, a high zero-shear viscosity material and a low zero-shear viscosity material. The foam core-forming component preferably comprises a foamable polymeric material including a suitable blowing agent. In a preferred embodiment, the three materials are selected from suitable homopolymers and copolymers of ethylene.