Suspension polymerization process
Abstract
Abstract PROCESS FOR PRODUCING STYRENIC POLYMER HAVING A PARTICLE GRAIN SIZE DISTRIBUTION SUCH THAT GREATER THAN 70% OF THE POLYMER PARTICLES HAVE A GRAIN SIZE OF 14 TO 40 MESH COMPRISING POLYMERIZING UNDER THE CONDITIONS OF SUSPENSION POLYMERIZATION AN AQUEOUS SUSPENSION OF A POLYMERIZABLE STYRENE MONOMER OR A SOLUTION OF SUCH A MONOMER CONTAINING A DIENE POLYMER, IN WHICH THE SUSPENSION POLYMERIZATION IS CONDUCTED WHILE STABILIZING THE SUSPENSION BY ADDING A SUSPENSION STABILIZING SYSTEM CONSISTING ESSENTIALLY OF ABOUT 0.01:1% OF HYDROXYETHYL CELLULOSE AND ABOUT 0.01-3% OF FINE PARTICLES OF A SUBSTANTIALLY WATER INSOLUBLE, INORGANIC PHOSPHATE AND.OR CARBONATE BASED ON THE WEIGHT OF SUSPENSION, AND FRUTHER IN WHICH THE SUSPENSION POLYMERIZATION IS CONDUCTED MORE PREFERABLY WHILE ADDING TO THE SUSPENSION ABOUT 0.001-0.02% BY WEIGHT OF AN ANIONIC SURFACE ACTIVE AGENT BASED ON THE WEIGHT OF THE SUSPENSION IN ADDITION TO THE ABOVE-MENTIONED ADDITIVES.
Inventors
- 👤 H Osuga
- 👤 S Kobayashi
Bibliographic Details
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