DESCRIPTION: Fluorothane G2 and G5 are two component fluorourethane primers
with excellent gloss and durability. Applied over pigmented urethane or
epoxy paints, Fluorothane G2 and G5 form an excellent substrate for the
highly fluorinated Fluorothane TFA top coat.
Fluorothane TFA is an ultra-low surface energy, highly fluorinated fluorourethane/fluoropolymer
hybrid with excellent gloss and chemical resistance. TFA chemically bonds
to uncured Fluorothane G2 and G5, resulting in a water repellent top coat
with good adhesion and an HB pencil hardness.
SURFACE PREPARATION: Soap wash (MIL-C-87937) and thoroughly rinse radome
surface including urethane nose boot. Lightly wet sand (3M 400-A) radome
and boot surfaces to a uniformly flat finish. Use care at the edge of the
nose boot that its adhesion is not disturbed. Rinse thoroughly and dry surface
by lightly tack ragging (Greider #G99-S17). When surface appears dry, wipe
with clean shop towel (Kim-Tex #33200) wetted slightly with MEK. Mask diverter
strips and non-transmissive, aft portions of nose cone.
G2 & G5 PRIMER APPLICATION: Temperature should be greater than 60°
F, and relative humidity should be less than 50 percent. Mix equal parts
Fluorothane G2 or G5 A and B by weight (or entire contents of each container),
thinning with MEK if necessary. Generally, use storage, application and
clean-up procedures customary for two part urethanes. Pot life is about
4 hours after mixing. Use conventional air spray or HVLP to apply a 1-2
mil wet coating. Clean up with MEK.
TFA APPLICATION: Allow Fluorothane G2 or G5 primer to dry one hour (but
not more than 2 hours) at 75° F before beginning to apply Fluorothane
TFA. Use conventional air spray or HVLP to apply a 0.5 to 1 mil wet coating.
Clean up with FCL52 followed by MEK. Immediately remove mask. Under cooler
conditions, allow G2 or G5 undercoat to dry two hours before applying TFA
top coat.
Primer and top coat will substantially cure in 48 hours under ambient conditions,
and in-flight rain conditions should be avoided during this period. Full
coating properties will be developed in 3 to 7 days. Cure may be accelerated
by heating surface to 140°F.
MAINTENANCE: Fluorothane TFA surfaces should only be cleaned with mild soap
and a soft sponge. Wiping with a dry cloth may put fine scratches in the
surface and reduce the effective receding contact angle of water, resulting
in some degree of water filming. Surfaces that have become scratched or
pitted can be repaired by spray applying a thin film of PFC1604A diluted
(1:2 w/w) with PFC8. Some minor abrasions may be repaired using a heat gun
at 140°F.
FluorN, FluoroSyl, FluoroPel, Fluorothane and PerFluoroCoat are trademarks
of the Cytonix Corporation. Patents
are issued or pending for the formulations listed on this page, for
certain methods of their application , and for the coating of certain articles.
Copyright 1997.
Cytonix Corporation
8000 Virginia Manor Road
Beltsville, MD 20705
phone: (888) CYTONIX
fax: (301) 470-6269
