Compositions for coatings based on (per) fluoropolyethers
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 29, 2004
Grant Date -
Oct 10, 2002
app pub date -
Jan 12, 2001
filing date -
Jan 17, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Cmpositions for coatings having a dry content higher than 80%, preferably of about 85-90% by weight, based on polyisocyanates and PFPEs, completely crosslinkable also in a range of temperatures between 5.degree. C. and 20.degree. C., comprising the following components: Component 1): mixture comprising: 1.a) Partially fluorinated prepolymers, having free NCO groups, obtained by reaction of (per)fluoropolyethers (PFPEs) diols having number average molecular weight Mn in the range 800-1,300 with the cyclic trimer of the isophorondiisocyanate, 1.b) non cyclic isocyanic trimer of hexamethylendiisocyanate, Component 2): (per) fluoropolyether (PFPE) diol with Mn in the range 350-700, preferably 500-650, component 3): inert organic solvent in crosslinking conditions, complement to 100% by weight of the composition.
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