发明申请
- 专利标题: PROCESS FOR PRODUCING FLUOROELASTOMERS
- 专利标题(中): 生产荧光体的方法
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申请号: US12354195申请日: 2009-01-15
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公开(公告)号: US20090186997A1公开(公告)日: 2009-07-23
- 发明人: Michael Cregg Coughlin , Ming-Hong Hung , Phan Linh Tang
- 申请人: Michael Cregg Coughlin , Ming-Hong Hung , Phan Linh Tang
- 专利权人: DuPont Performance Elastomers L.L.C.
- 当前专利权人: DuPont Performance Elastomers L.L.C.
- 主分类号: C08F2/00
- IPC分类号: C08F2/00 ; C07F9/141
摘要:
An emulsion polymerization process for the production of fluoroelastomers is disclosed wherein at least one fluorosurfactant is employed as dispersant, said fluorosurfactant being a fluoroalkylphosphoric acid ester of the formula X—Rf—(CH2)n—O—P(O)(OM)2, wherein n=1 or 2, X═H or F, M=a univalent cation, and Rf is a C4-C6 fluoroalkyl or fluoroalkoxy group. Optionally, a second dispersing agent may be employed in the polymerization, said second agent being a perfluoropolyether having at least one endgroup selected from the group consisting of carboxylic acid, a salt thereof, sulfonic acid and a salt thereof, phosphoric acid and a salt thereof.
公开/授权文献
- US07999049B2 Process for producing fluoroelastomers 公开/授权日:2011-08-16
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