Dyestuffs for perfluoropolyoxyalkylenes and compositions based on perfluoropolyoxyalkylenes containing such dyestuffs
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United States of America Patent
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May 11, 1993
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N/A
app pub date -
Feb 11, 1992
filing date -
Feb 15, 1991
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Abstract
1. Dyestuffs for cyclic or straight polyfluoropolyoxyalkylenes, of general formula: Q[B--(A).sub.s ].sub.t (III) or [(Q).sub.s --B].sub.2 A (IV) where: Q=an organic group containing a chromophore group, free from free or salified sulphonic and/or carboxylic groups, and/or sulphon-amidic groups; A=a perfluorooxyalkylene chain, which is monovalent in formula (II) and divalent in formula (III); B=an organic at least divalent group; s, t=1 or 2, respectively. 2. Compositions comprising cyclic or straight polyfluoropolyoxyalkylenes and at least a dyestuff of formula (III) or (IV) dissolved therein.
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