Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1997-06-10
2000-06-06
Acquah, Samuel A.
Coating processes
With post-treatment of coating or coating material
Heating or drying
528 45, 528 48, 528 59, 528 65, 528 70, 528 76, 528 77, 524755, 524768, 524770, 525452, 525453, 525456, 4272082, 427335, 4273722, 4273883, 427487, B05D 302, C08G 1828
Patent
active
060715642
ABSTRACT:
Use for protective coatings of compositions comprising (% by wt.): A) from 10 to 60% of a A1) (per)fluoropolyethereal prepolymer having a polyisocyanic functionality obtainable by reacting a bifunctional having hydroxylic functionality, said fluoropolyethers having --CH.sub.2 OH terminations directly linked to a perfluoroalkylic group CF.sub.2 or CF.sub.2 CFX (X.dbd.Cl, F) or CF(CF.sub.3), with a polyisocyanate containing isocyanurate rings, preferably obtained by cyclotrimerization of HDI, IPDI or other monomeric diisocyanates, by utilizing an excess of isocyanate groups comprised between 10 and 80% by moles; the above fluoropolyether prepolymer can be partially or totally replaced by A2) non fluorinated polyisocyanates containing isocyanurate rings and/or hydrogenated polyisocyanate prepolymers;
B) from 0.1 to 50% of a (per)fluoropolyether having bifunctional hydroxylic functionality of the type --CF.sub.2 CH.sub.2 OH, --CF.sub.2 CFXCH.sub.2 OH (X.dbd.Cl, F) or --CF(CF.sub.3)CH.sub.2 OH; or polyfunctional hydroxylic functionality termination but containing at least 5% by weight, preferably 10%, of the same type of termination indicated above for the bifunctional; or (per)fluoropolyethers prepolymers as defined in A) but having a lower prepolymerization degree so to leave free oxydrilyic functions of the type --CF.sub.2 CH.sub.2 OH, --CF.sub.2 CFXCH.sub.2 OH (X.dbd.Cl, F), or --CF(CF.sub.3)CH.sub.2 OH;
or the latter prepolymers having free hydroxilic functions can be used alone as a single component, being component A) 0%;
C) 10-90%, with respect to the resin of a diluting solvent.
REFERENCES:
patent: 2242218 (1941-05-01), Auer
patent: 3665041 (1972-05-01), Sianesi et al.
patent: 3715378 (1973-02-01), Sianesi et al.
patent: 3810874 (1974-05-01), Mitsch et al.
patent: 4704420 (1987-11-01), Federici et al.
patent: 4758622 (1988-07-01), Gosselin
patent: 4781987 (1988-11-01), Bolgiano et al.
patent: 4853097 (1989-08-01), Marchionni et al.
patent: 4863986 (1989-09-01), Re et al.
patent: 5104911 (1992-04-01), Marchionni et al.
patent: 5426142 (1995-06-01), Rosano et al.
Italian patent application No. 19779A/86, filed Mar. 17, 1986 (now abandoned).
Italian patent application No. 19780A/86, filed Mar. 17, 1986(now abandoned).
Italian patent application No. MI95A0855, filed Apr. 28, 1995, corresponding to European Application No. EP-A-739 923.
Malavasi Massimo
Marchetti Roberta
Acquah Samuel A.
Ausimont S.p.A.
LandOfFree
Coatings based on perfluoropolyethers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coatings based on perfluoropolyethers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coatings based on perfluoropolyethers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2211421