Peroxidic perfluoropolyethers

Details Peroxidic perfluoropolyethers Peroxidic perfluoropolyethers

2008-04-29

2008-04-29

Zucker, Paul A. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic halides

Reexamination Certificate

active

11063996

ABSTRACT:
Peroxidic perfluoropolyethers having formula:in-line-formulae description="In-line Formulae" end="lead"?X1—O(CF2O)n1(CF2CF2O)m1(CF2(CF2)zCF2O)p1(O)h—X2  (I)in-line-formulae description="In-line Formulae" end="tail"?wherein:X1and X2, equal to or different from each other, are chain end groups selected between —CF2COF and —COF;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
1 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.

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