Process for producing water- and oil-repellent agent
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United States of America Patent
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Nov 10, 2009
Grant Date -
Mar 20, 2008
app pub date -
May 27, 2005
filing date -
Jun 4, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A water- and oil-repellent agent is produced by subjecting (a) a polyfluoroalkyl group-containing (meth)acrylate and (b) a fluorine atom-free polymerizable monomer to an emulsification treatment in the presence of (c) a polyethylene oxide adduct type, cationic surfactant, or both of the cationic surfactant and a polyethylene oxide adduct type, non-ionic surfactant, and (d) a glycol-based compound, followed by copolymerization reaction in the presence of a polymerization initiator, and admixing the resulting aqueous dispersion with (e) a blocked isocyanate, and gives a satisfactory water and oil repellency to not only synthetic fibers, but also natural fibers, and also has a distinguished washing durability.
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