申请人:MARCHIONNI Giuseppe
公开号:US20080194881A1
公开(公告)日:2008-08-14
Peroxidic perfluoropolyethers having formula:
X
1
—O(CF
2
O)
n1
(CF
2
CF
2
O)
m1
(CF
2
(CF
2
)
z
CF
2
O)
p1
(O)
h
—X
2
(I)
wherein:
X
1
and X
2
, equal to or different from each other, are chain end groups selected among —CF
2
COF, —COF, —SO
2
F;
n1, m1, p1 and h are integers such that the number average molecular weight is in the range 700-100,000;
z=1 or 2;
with the proviso that:
the m1/n1 ratio is between 0.2 and 10;
the p1/(n1+m1) ratio is lower than 0.05;
the h/(n1+m1+p1) ratio is such that the PO content, defined as grams of active oxygen/100 g of compound, is in the range 0.8-4.5, preferably 1.4-3.8;
the perfluorooxyalkylene units being statistically distributed along the polymeric chain.