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公开(公告)号:US06469116B2
公开(公告)日:2002-10-22
申请号:US09340137
申请日:1999-06-28
IPC分类号: C08F21612
CPC分类号: B01D71/44 , C08F34/02 , C08F214/262
摘要: Amorphous fluoropolymer selfsupported manufactured articles obtained by casting from solution in a single step, characterized in that they are obtained by the polymerization of a structure (I), optionally and preferably with a monomer having a structure (II): CF2=CY1Y2 (II) wherein: Rf is a C1-C5 perfluoroalkyl radical; X1 and X2 are selected from F and CF3; Y1 and Y2 are selected from F, Cl, H, CF3, ORf; having refractive index lower than 1.35, transmittance higher than 90% in the radiation field 300-2,000 nm wave length, and thickness higher than 20-25 &mgr;m.
摘要翻译: 无定形含氟聚合物自支撑的制品通过单一步骤从溶液中浇铸获得,其特征在于它们通过结构(I)的聚合获得,任选且优选具有结构(II)的单体:其中:Rf为C1 -C5全氟烷基; X1和X2选自F和CF3; Y1和Y2选自F,Cl,H,CF3,ORf; 折射率低于1.35,在300-2000nm波长的辐射场中的透射率高于90%,厚度高于20-25μm。
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公开(公告)号:US5473030A
公开(公告)日:1995-12-05
申请号:US345769
申请日:1994-11-22
CPC分类号: C08F14/22 , C08F2438/01
摘要: Object of the present invention is a process for preparing vinylidenefluoride (VDF) polymers which comprises polymerizing VDF, optionally in association with other fluorinated oiefins in an aqueous medium in the presence of a radical initiator and of 1,1,1-trifluoro-2,2-dichloroethane (HCFC-123) as chain transfer agent.A final product with very good colour characteristics (appearance), substantially devoid of discoloration effects at high temperatures, is so obtained.
摘要翻译: 本发明的目的是制备偏二氟乙烯(VDF)聚合物的方法,其包括在自由基引发剂和1,1,1-三氟-2,2-二氯乙烯存在的条件下,在水性介质中任选与其它氟化油相结合的聚合VDF, 作为链转移剂的2-二氯乙烷(HCFC-123)。 具有非常好的颜色特性(外观)的最终产品,在高温下基本上没有变色效果。
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