Aqueous compositions of perfluoropolyether phosphates and use thereof to confer oleo-repellence to paper
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United States of America Patent
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Nov 28, 2006
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app pub date -
Jan 13, 2003
filing date -
Jan 15, 2002
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Abstract
Aqueous compositions of (per)fluoropolyether phosphates of formula: T--O--[R.sub.f--CFY--L--O]P(O)(O.sup.-Z.sup.+)(OH); (A) and/or (OH).sub.m(O.sup.-Z.sup.+).sub.2-mP(O)[O--L--YFC--O--R.sub.f--CFY--L--O---P(O)(O.sup.-Z.sup.+)].sub.m'----[O--L--YFC--O--R.sub.f--CFY--L--O]P(O)(O.s-up.-Z.sup.+).sub.2-m(OH).sub.m (B) and use thereof to confer oleo-repellence to the paper by means of the size-press method.
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