发明申请
- 专利标题: Brominated Anionic Styrenic Polymers and Their Preparation
- 专利标题(中): 溴化阴离子苯乙烯聚合物及其制备
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申请号: US12636250申请日: 2009-12-11
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公开(公告)号: US20100087620A1公开(公告)日: 2010-04-08
- 发明人: Charles H. Kolich , John F. Balhoff , Martin B. Berdon , Ronny W. Lin
- 申请人: Charles H. Kolich , John F. Balhoff , Martin B. Berdon , Ronny W. Lin
- 申请人地址: US LA Baton Rouge
- 专利权人: Albemarle Corporation
- 当前专利权人: Albemarle Corporation
- 当前专利权人地址: US LA Baton Rouge
- 主分类号: C08G79/00
- IPC分类号: C08G79/00
摘要:
Concurrently fed into a reaction zone held at about 10° C. or less are brominating agent, aluminum halide catalyst, and a solution of anionic styrenic polymer having a GPC Mn about 2000-30,000. The components are in at least two separate feed streams. The feeds are proportioned to maintain (a) the amount of aluminum halide being fed at about 0.8 mole percent or less based on the amount of aromatic monomeric units in the polymer being fed, and (b) amounts of brominating agent and unbrominated polymer in the reaction zone that produce a final washed and dried polymer product containing about 60-71 wt % bromine. The catalyst is deactivated, bromide ions and catalyst residues are washed away from the reaction mixture, and the brominated anionic styrenic polymer is recovered and dried. The dried polymer has a volatile bromobenzene content of about 600 ppm (wt/wt) or less as well as other beneficial properties.
公开/授权文献
- US08071688B2 Brominated anionic styrenic polymers and their preparation 公开/授权日:2011-12-06