会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 27. 发明授权
    • Process for the preparation of perfluoropolyoxyalkylenes with hydroxyl end groups
    • 用羟基端基制备全氟聚氧化烯的方法
    • US06509509B2
    • 2003-01-21
    • US09750101
    • 2000-12-29
    • Claudio TonelliAntonio RussoEzio Strepparola
    • Claudio TonelliAntonio RussoEzio Strepparola
    • C07C4311
    • C08G65/324C08G65/007
    • A process for preparing perfluoropolyoxyalkylenes with hydroxyl end groups having structure: T1—CFW1—O—Rf—CFW2—T2  (I) wherein: T1, T2, are selected from —CH2OH, —F, —CF3, —CF2CF3 with the proviso that at least one of T1 and T2 is —CH2OH; W1 and W2 are selected from F, CF3; Rf is a perfluoropolyoxyalkylene chain having a number average molecular weight 500-10,000 comprising one or more units of the type —CF2CF2O—, —CF2O—, —C3F6O—, —CF2(CF2)zCF2O— (z=1,2); —CR4R5CF2CF2O— with R4 and R5 selected from H, Cl, perfluoroalkyl group; said process comprising the following steps: a) adding an ester precursor having structure (I) and T1, T2 end groups selected from —F, —CF3, —CF2CF3, —COOR (R=linear or branched alkyl group having a number of C atoms from 1 to 5), with the proviso that at least one of T1 and T2 is —COOR, in a reaction mixture formed by: an inert or protic reaction solvent; a reducing agent selected from metal hydrides; an unreactive organic base with respect to the ester; b) hydrolysis of the product obtained in step a) for obtaining the compounds of structure (I) with at least a —CH2OH end group.
    • 制备具有以下结构的羟基端基的全氟聚氧化烯的方法:其中:T1,T2选自-CH2OH,-F,-CF3,-CF2CF3,条件是T1和T2中的至少一个为-CH2OH; W1和W2 选自F,CF 3; Rf是数均分子量为500-10,000的全氟聚氧亚烷基链,其包含一种或多种-CF 2 CF 2 O-,-CF 2 O-,-C 3 F 6 O-,-CF 2(CF 2)z CF 2 O-(z = 1,2); -CR4R5CF2CF2O-,其中R4和R5选自H,Cl,全氟烷基; 所述方法包括以下步骤:a)加入具有结构(I)和T1的酯前体,T2端基选自-F,-CF 3,-CF 2 CF 3,-COOR(R =直链或支链烷基,其数目为C 原子从1至5),条件是至少一个T1和T2是-COOR,在由惰性或质子反应溶剂形成的反应混合物中;还原剂选自金属氢化物;非反应性有机碱,相对于 酯化; b)在步骤a)中获得的产物的水解,得到至少具有-CH 2 OH端基的结构(I)化合物。