An iodine-containing compound consisting of at least two repeating units selected from the formulae:
-(CH₂CF₂CF₂O)a-
-(CHClCF₂CF₂O)b-
-(CCl₂CF₂CF₂O)c-
-(CHFCF₂CF₂O)d-
-(CFClCF₂CF₂O)e-
-(CF₂CF₂CF₂O)f-
wherein a, b, c, d, e and f are each 0 or a positive integer and satisfy the following equations:
2 ≦ a+b+c+d+e+f ≦ 200 and
1 ≦ a+c+d+f
and an iodine atom at at least one end of a molecule, which can provide a block copolymer which is useful as a grease.
由至少两个重复单元组成的含
碘化合物,这些重复单元选自以下式子:
-(CH₂CF₂CF₂O)a-
-(CHClCF₂CF₂O)b-
-(CCl₂CF₂CF₂O)c-
-(CHFCF₂CF₂O)d-
-(
CFClCF₂CF₂O)e-
-(CF₂CF₂CF₂O)f-
其中 a、b、c、d、e 和 f 各为 0 或正整数,并满足以下等式:
2 ≦ a+b+c+d+e+f ≦ 200 和
1 ≦ a+c+d+f
和一个
碘原子至少位于一个分子的一端,可提供一种可用作润滑脂的嵌段共聚物。