Process technology for recovering brominated styrenic polymers from reaction mixtures in which they are formed and/or converting such mixtures into pellets or into granules or pastilles
Charles H. Kolich;Bruce C. Peters;Robert C. Herndon;John F. Balhoff;Douglas W. Luther;Ronny W. Lin;David A. Lee;Arthur G. Mack
发明人:
Charles H. Kolich,John F. Balhoff,Douglas W. Luther,Robert C. Herndon,Ronny W. Lin,Bruce C. Peters,Arthur G. Mack,David A. Lee
申请号：
US13619256
公开号：
US08450429B2
申请日:
2012.09.14
申请国别(地区):
US
年份:
2013
代理人:
摘要：
Brominated styrenic polymer is recovered from solution in a vaporizable solvent by converting the solution in a devolatilization extruder into a brominated styrenic polymer melt or flow and a separate vapor phase comprised predominately of vaporizable solvent, recovering the melt or flow from the devolatilization extruder, and allowing or causing the melt or flow to solidify. The solidified brominated styrenic polymer can be subdivided into a powder or pelletized form. Pellets so made have improved hardness and/or crush strength properties along with reduced formation of fines. Brominated anionic styrenic polymer is preferably used in the process.
