abstract |
The invention relates to a difunctional perfluoro-polyether oil, prepared by reacting a perfluoropolyether diol oil having a weight averaged molecular weight (Mw) between 1500 and 3000 with a chain lengthener from the group of diacid chlorides and diisocyanates, and to perfluoropolyether rubbers prepared by means of these chain-lengthened oils. |