FLUORINATED PHOSPHONIC ACIDS

摘要

Fluorinated phosphonic acid compounds, useful as treatments for substrate surfaces, have the formula:wherein:R<1 >is a straight chain alkylene group having from about 3 to about 21 carbon atoms, an oxa-substituted straight chain alkylene group having from about 2 to about 20 carbon atoms, or a thia-substituted straight chain alkylene group having from about 2 to about 20 carbon atoms;R<2 >is a perfluoroalkyl group having from about 4 to about 10 carbon atoms;R<3 >is hydrogen, an alkali metal cation, or an alkyl group having from about 1 to about 6 carbon atoms; andM is hydrogen or an alkali metal cation, with the proviso that if R<1 >is an unsubstituted straight chain alkylene group, then the sum of carbon atoms in R<1 >and R<2 >combined is at least 10.