公开(公告)号：US3870689A

公开(公告)日：1975-03-11

申请号：US38891073

申请日：1973-08-16

申请人： MONTEDISON SPA

发明人： MODENA MARIO ,  RAGAZZINI MARIO ,  BORSINI GIANCARLO ,  VALERA MARCO

IPC分类号： C08F10/00 ,  C08F214/26 ,  C08F1/06 ,  C08F15/02

CPC分类号： C08F214/265 ,  C08F10/00 ,  C08F214/26 ,  C08F210/02 ,  C08F4/28

摘要： Crystalline copolymers of ethylene and tetrafluoroethylene of high thermal stability characteristics in the molten state and high resistance to oxidation under heat, having a contact in tetrafluoroethylene from 53 to 63% in moles, homogeneously distributed along the chain axis and among the chains characterized in that the temperature gap between their ultimate melting temperature and the temperature at which oxidative decomposition of the copolymers begins is at least 80*C. They are prepared by polymerization of monomers mixtures having a content in tetrafluoroethylene greater than 78% in moles. The copolymers can be used as plastic materials and are particularly useful since said temperature gap of at least 80*C permits the processing thereof, and the reprocessing of scraps, to useful manufactured articles, conveniently and economically and by conventional techniques.

摘要翻译： 在熔融状态下具有高热稳定性特征的乙烯和四氟乙烯的结晶共聚物，并且在加热下具有高抗氧化性，在四氟乙烯中以53至63摩尔％的摩尔接触，沿链轴和链之间均匀分布，其特征在于， 它们的最终熔融温度和共聚物开始氧化分解的温度之间的温度差为至少80℃。它们通过以四烯重的含量大于78％（摩尔）的单体混合物的聚合制备。