METHOD OF OBTAINING POLYSTYRENE PLASTICS

摘要

A method of obtaining polystyrene plastics consists in that an aqueous medium containing fresh-made tricalcium phosphate (0.15-1.5 % by weight) and calcium carbonate (0.07-0.35 % by weight) is heated before mixing it with a monomer (comonomer or prepolymer) for preparation of a suspension, and during the suspension-polymerization process, at a conversion of 15-47 %, secondary sodium alkyl sulphates (0.001-0.020 % by weight) are introduced. The method allows to obtain all kinds of polystyrene plastics by using the same technology, to provide for required granulometric composition of the beads with a low content of powder fractions and to increase the stability of the process.