abstract |
2,4,4,5,5,6,6-heptafluoro-2-trifluoromethyl-3-oxaheptane-1,7-diol polyfor, l n HOCH 2 CF 2 CF 2 CF 2 OCF(CF 3 )CH 2 O[CH 2 OCH 2 CF 2 CF 2 CF 2 OCF(CF 3 )CH 2 O] n H, n which is prepared by reacting the diol with formaldehyde in 80-90 percent sulfuric acid. |