The perfluoro poly ether oil which possesses two functional groups which extend chain length and from this is prepared the rubber

摘要

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.