公开(公告)号：EP0456019B1

公开(公告)日：1996-02-28

申请号：EP91106261.0

申请日：1991-04-18

Applicant: ELF ATOCHEM NORTH AMERICA, INC.

Inventor： Barber, Leonard Aloysius

IPC: C08F214/28 ,  C08F214/22

CPC classification number: C08F259/08 ,  C08F214/22 ,  C08F214/28

公开(公告)号：EP0456019B2

公开(公告)日：2000-05-24

申请号：EP91106261.0

申请日：1991-04-18

Applicant: ELF ATOCHEM NORTH AMERICA, INC.

Inventor： Barber, Leonard Aloysius

IPC: C08F214/28 ,  C08F214/22

CPC classification number: C08F259/08 ,  C08F214/22 ,  C08F214/28

公开(公告)号：EP0456019A1

公开(公告)日：1991-11-13

申请号：EP91106261.0

申请日：1991-04-18

Applicant: ELF ATOCHEM NORTH AMERICA, INC.

Inventor： Barber, Leonard Aloysius

IPC: C08F214/28 ,  C08F214/22

CPC classification number: C08F259/08 ,  C08F214/22 ,  C08F214/28

Abstract: Melt processable copolymers of vinylidene fluoride and hexafluoropropylene, containing from about 1% to about 20% hexafluoropropylene by weight, are prepared by emulsion polymerization of vinylidene fluoride and hexafluoropropylene in a stirred aqueous reaction medium. The reaction medium is formed by charging to a heated reactor, water, vinylidene fluoride, an initiator to start the polymerization, and a water-soluble surfactant capable of emulsifying both the initiator and the reaction mass during polymerization. Additional amounts of vinylidene fluoride and initiator are fed to the reaction medium to continue polymerization of the vinylidene fluoride monomer until from abut 50% to abut 90% of the total weight of the vinylidene fluoride monomer utilized in the process has been added to the reaction medium. There is then added to the reaction medium (i) from about 1% to about 20% hexafluoropropylene by weight, based upon the combined weight of the hexafluoropropylene and the total weight of the vinylidene fluoride utilized in the process, and (ii) the balance of the vinylidene fluoride utilized in the process. The resulting vinylidene fluoride/hexafluoropropylene copolymers are characterized by improved mechanical properties and a DSC melting point typically in the range of from about 160°C to about 170°C, preferably from about 163°C to about 168°C.

Abstract translation: 熔化的偏二氟乙烯和六氟丙烯共聚物加工，以重量计从约1％到大约20％六氟丙烯，通过偏二氟乙烯和六氟丙烯乳液聚合在搅拌wässrige反应介质来制备。 将反应介质通过充电到加热的反应器，水，偏二氟乙烯，在引发剂，开始聚合反应，并能够乳化这两种引发剂和聚合过程中反应物料的水溶性表面活性剂形成。 的偏二氟乙烯和引发剂额外量被馈送到反应介质中以继续偏二氟乙烯单体的聚合，直到从邻接50％至在该过程中使用的偏二氟乙烯单体的总重量的邻接的90％已被添加到反应介质中 ， 再有按重量加入到反应介质（i）从约1％至约20％的六氟丙烯，基于六氟丙烯的组合重量和的偏二氟乙烯的过程中使用的总重量，和（ii）的平衡 的偏氟乙烯的过程中使用。 将得到的偏二氟乙烯/六氟丙烯共聚物是通过改进的机械性能和在从约160℃至约170℃范围内的DSC熔点典型特征，优选从约163℃至约168℃。