发明公开
EP2340265A1 PROCESS FOR PRODUCTION OF SUPERABSORBENT POLYMER GEL WITH SUPERABSORBENT POLYMER FINES
有权
用于生产超吸收性聚合物凝胶与再循环SUPERABSORBIERDEN POLYMERFEINSTTEILCHEN
- 专利标题: PROCESS FOR PRODUCTION OF SUPERABSORBENT POLYMER GEL WITH SUPERABSORBENT POLYMER FINES
- 专利标题(中): 用于生产超吸收性聚合物凝胶与再循环SUPERABSORBIERDEN POLYMERFEINSTTEILCHEN
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申请号: EP09736905.2申请日: 2009-10-13
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公开(公告)号: EP2340265A1公开(公告)日: 2011-07-06
- 发明人: TIAN, Gonglu , SMITH, Scott J. , PATE-LINTON, Janet
- 申请人: Evonik Stockhausen, LLC
- 申请人地址: 2401 Doyle Street Greensboro, NC 27406 US
- 专利权人: Evonik Stockhausen, LLC
- 当前专利权人: Evonik Stockhausen, LLC
- 当前专利权人地址: 2401 Doyle Street Greensboro, NC 27406 US
- 代理机构: Lang, Arne
- 优先权: US256038 20081022
- 国际公布: WO2010046267 20100429
- 主分类号: C08F265/04
- IPC分类号: C08F265/04 ; C08F265/06 ; C08L51/00 ; C08J3/00 ; C08L101/02 ; A61L15/60
摘要:
A process is described for recycling superabsorbent polymer fines into a process that includes treating the superabsorbent polymer fines with caustic and a polymerization step for making the superabsorbent polymer gel. The process requires treating the superabsorbent polymer fines with a caustic, followed by mixture with polymerizable monomer solution, and polymerizing the mixture of the superabsorbent polymer fines and monomer to form the aqueous fluid absorbent polymer. In the process, the fines are incorporated into the new polymer gel and become indistinguishable there from. The gel may then be comminuted into a particulate dried and then separated into a portion having a desired minimum particle size in a fines portion having less than the desired size. The particulate may then be coated with a surface crosslinking agent and surface additives and heated for surface conversion.
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