Abstract: A novel process for preparing vinyl aromatic polymer particles is described. The particles and beads are suitable for being processed into foamed styrenic products of substantially improved insulation values, as well as other useful products.

Abstract: A novel process for preparing vinyl aromatic polymer particles is described. The particles and beads are suitable for being processed into foamed styrenic products of substantially improved insulation values, as well as other useful products.

Abstract: A process for the preparation of amine-functionalized vinyl polymer particles which process comprises suspension polymerizing minostyrene together with at least one other vinylic monomer and optionally a crosslinking agent.

Abstract: A process for the preparation of amine-functionalised vinyl polymer particles which process comprises suspension polymerizing minostyrene together with at least one other vinylic monomer and optionally a crosslinking agent.

Abstract: A process for the preparation of amine-functionalised vinyl polymer particles which process comprises suspension polymerizing aminostyrene together with at least one other vinylic monomer and optionally a crosslinking agent.

Abstract: A process for the preparation of amine-functionalized vinyl polymer particles which process comprises suspension polymerizing aminostyrene together with at least one other vinylic monomer and optionally a crosslinking agent.

Abstract: The invention describes a process for the preparation of a particulate polymer, said process comprising: i) forming an aqueous dispersion comprising a particulate polymer seed material and a first organic compound; ii) allowing said first organic compound to diffuse into said seed material to produce a pre-swollen seed material; iii) contacting said pre-swollen seed material in aqueous dispersion with said first organic compound and a second organic compound, preferably one which is soluble in said first organic compound; iv) allowing or causing said first and second organic compounds to pass into said pre-swollen seed material to produce an activated seed material; v) contacting said activated seed material with a monomer and effecting suspension polymerization thereof.

Abstract: The invention describes a process for the preparation of a particulate polymer, said process comprising: i) forming an aqueous dispersion comprising a particulate polymer seed material and a first organic compound; ii) allowing said first organic compound to diffuse into said seed material to produce a pre-swollen seed material; iii) contacting said pre-swollen seed material in aqueous dispersion with said first organic compound and a second organic compound, preferably one which is soluble in said first organic compound; iv) allowing or causing said first and second organic compounds to pass into said pre-swollen seed material to produce an activated seed material; v) contacting said activated seed material with a monomer and effecting suspension polymerization thereof.

Abstract: The invention provides a process for the preparation of amine-functionalised vinyl polymer particles which process comprises suspension polymerizing aminostyrene together with at least one other vinylic monomer and optionally a crosslinking agent.

Abstract: The invention provides a process for the preparation of polymer particles having a mode particle size of at least 50 &mgr;m which process comprises (a) obtaining a first particulate polymer seed material having a mode particle diameter of no more than 50 &mgr;m; (b) using said first seed material, performing a suspension polymerization involving the steps: (i) forming an aqueous dispersion comprising a polymer seed material, an organic compound (e.g. a polymerization initiator) which has a molecular weight of less than 5000 Daltons and a water solubility of less than 10−2 g/L at 25° C., a stabilizer and optionally an organic solvent (e.g. acetone or a portion of the monomer mentioned below); (ii) allowing said organic compound to diffuse into the seed material to produce an activated seed material; and (iii) contacting said activated seed material with a monomer (e.g.

Abstract: The invention provides a process for the preparation of a particulate polymer having a mode particle size of at least 200 &mgr;m, the improvement comprising the use of substantially monodisperse polymeric particles as polymerization seeds in a suspension polymerization preparation of said particulate polymer.