HALOGEN-CONTAINING POLYETHER Russian patent published in 1998 - IPC

FIELD: polymer chemistry. SUBSTANCE: halogen-containing polyether has structural units having formula where a,b, c,d,e and f are integer from 0 to 25 and they obey equations 2≤a+b+c+d+e+f≤200 and 1≤a+c+d+f, where R₁ is fluorine, iodine, C₃F₇O; R₂ is lower alkyl optionally comprising chlorine or fluorine, lower alkyloxy optionally comprising fluorine. Polyether may be obtained by polymerization of 2,2,3,3-tetrafluorosectane ring together with its decyclization, the process is carried out in the presence of initiator of polymerization. Thus polyether having structural units with formula -(CH₂CF₂CF₂O)_a (where a is as mentioned above) is obtained. If it is necessary then polyether is affected by fluoridation and/or by chlorination. EFFECT: improved quality. 6 cl, 7 dwg