Method of preparing styrene polymers by suspension polymerization

PCT No. PCT/SU91/00122 Sec. 371 Date Apr. 26, 1993 Sec. 102(e) Date Apr. 26, 1993 PCT Filed Jun. 25, 1991 PCT Pub. No. WO93/00374 PCT Pub. Date Jan. 7, 1993.In a method of preparing styrene plastics, the water medium containing tricalcium phosphate is prepared in situ (0.15 to 1.5 wt. %). Then, calc...

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Hauptverfasser:	BALLOVA, GALINA D, MEKHED, IGOR A, KARMAKOVA, VALENTINA G, ROZHAVSKY, MIKHAIL G, RUPYSHEV, VLADIMIR G, EREMINA, EVGENIA N, AMOSOV, VIKTOR V, PYKHTIN, VIKTOR A, SHAMINA, VALENTINA P, ALEXEEVA, LARISA V, RUMYANTSEV, SERGEI G, ABRAMOVA, VERA K, ROLNIK, MIKHAIL D, MALADZYANOVA, LARISA F, KUSHEVERSKAYA, SVETIANA V
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Zusammenfassung:	PCT No. PCT/SU91/00122 Sec. 371 Date Apr. 26, 1993 Sec. 102(e) Date Apr. 26, 1993 PCT Filed Jun. 25, 1991 PCT Pub. No. WO93/00374 PCT Pub. Date Jan. 7, 1993.In a method of preparing styrene plastics, the water medium containing tricalcium phosphate is prepared in situ (0.15 to 1.5 wt. %). Then, calcium carbonate (0.07 to 0.35 wt. %) is heated and dispersed therein. Thereafter, the monomer/comonomers/prepolymer, and secondary sodium alkylsulphates (0.001 to 0.020 wt. %) are introduced into the suspension polymerization process at 15 to 47% conversion. This method permits production of styrene plastics using a common technology, while providing specified bead size distribution, low concentration of dust fractions, and enhancement of the process stability.