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    • 22. 发明申请
    • FLUOROELASTOMERS
    • 荧光素
    • US20090088529A1
    • 2009-04-02
    • US12161638
    • 2007-01-15
    • Francesco TriulziMargherita AlbanoMilena Stanga
    • Francesco TriulziMargherita AlbanoMilena Stanga
    • C08L27/16
    • C08F214/22C08F214/225C08F216/1408C08F236/20
    • VDF-based curable fluoroelastomers, having a glass transition temperature lower than −49° C., preferably lower than −50° C., and having the following composition, as percent by moles: A) from 25% to 50%, preferably from 30% to 45%, of the monomer of formula: CF2=CFOCF2OCF3 (a); B) one or more (per)fluorinated comonomers having at least one unsaturation of ethylene type in amounts from 75% to 50%, preferably from 70% to 55%; said one or more comonomers comprising vinylidene fluoride (VDF) in amounts from 50% to 75% on the total of the monomer moles; the sum of the molar percentages of the monomers being 100%; said fluoroelastomers containing an amount of —COF end groups in the polymer lower than the sensitivity limit of the method reported in the description.
    • 玻璃化转变温度低于-49℃,优选低于-50℃的VDF基可固化的含氟弹性体,具有如下组成,按摩尔%计:A)25%-50%,优选 30%至45%的式:CF 2 = CFOCF 2 OCF 3(a)的单体; B)一种或多种具有75%至50%,优选70%至55%的乙烯类型的至少一种不饱和度的(全)氟化共聚单体; 所述一种或多种共聚单体包含单体摩尔数总计为50%至75%的偏二氟乙烯(VDF); 单体的摩尔百分比之和为100%; 所述含氟弹性体在聚合物中含有一定量的-COF端基,低于说明书中报道的方法的灵敏度极限。