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ACRACOAT
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General
Information: Acracoat AL offers an
environmentally friendly solution in protecting Aluminum surfaces from
oxidization. Acracoat AL works by leaving a thin clear film that is impermeable
to moisture and surrounding elements. Acracoat AL is a water-based Acrylic
coating with NO harmful VOC’s. Acracoat
AL can be used as a primer (use before painting) or can be used as a clear coat
(for use after paint) The current market for anti-oxidization primers is held
by solvent-borne coatings, typically at low solids contents (approx. 25%), and
these do not meet the strict VOC (Volatile Organic Content) guidelines arising
throughout North America. These perform the task reasonably, but require that
the base metal be de-rusted and pre-cleaned to a large extent, and subsequent
painting with a quality topcoat is necessary to maintain the anti-oxidization
abilities. Acracoat
AL is an aqueous primer which we feel meets both ecological concerns and
provides high resistance to corrosion and will also prevent long-term oxidization
of Aluminum. A fault of aqueous coatings of the past is the need for coalescent
to provide the necessary film hardness and abrasion resistance. The use of
co-solvent adds a large VOC component to the paint decreasing some of the
benefits of using aqueous paints in preference to solvent-borne coatings. Our
primer has no co-solvent or plasticizer and can offer a zero VOC anti-oxidation
primer. Possibly the most important feature of these metal primers is that they
do not contain any heavy metals. This offers a tremendous ecological
benefit when these paints replace the more common solvent-borne often
containing zinc chromates or other toxic metal-based additives. Though the
method of application, condition of substrate and coverage rate will influence
performance, it is noted that Acracoat AL applied in two coats exhibit
excellent anti oxidation resistance, according to DIN50021, as follows,
representing 240 hours of salt-fog exposure, without top-coating:
a)
No oxidization
b)
No
under-oxidization at the cut-line
c)
No spread at the
cut-line
d)
No oxidization
below the paint
e)
No blisters on the
surface. Benefits: Some
benefits of Acracoat AL primer are:
a)
100% aqueous,
meets zero VOC criteria (EPA method 24, ASTM D-2359)
b)
air dries rapidly,
in minutes, similar to solvent systems
c)
can be brush,
roller, dip or spray applied, after appropriate viscosity adjustment
d)
can be applied to
previously rusted surfaces
e)
provides proven,
long-term bond to metals, i.e. outstanding adhesion
f)
odorless
g)
can be top coated
with aqueous or solvent-borne paints, or self-top-coated
h)
primer has good
outdoor weather-ability without top coating
i)
primer has
excellent , and early water and chemical resistance
j)
environmentally
friendly and non-flammable
k)
rapid resistance
to severe scuffing and abrasion
l)
protection is not
based upon heavy metals
m)
since it is
pigment-free, settling or separation in dip tanks is negligible Properties: The physical properties of
Acracoat anti-corrosive primer are as follows: Chemistry........................... proprietary acrylic waterborne Solids.................................... >40% Color................................... Steel Grey or iron oxide red
(Other colors by request) Odor.................................... negligible, can be used indoors Volatiles................................ Only water Cure
time.............................. <1
hour Topcoat.............................. typically after 3 hours Elongation
%........................ 1396 (ASTM
D-412) Abrasion
resistance................ very
high Water
resistance.................... Very
high and rapid attainment Application........................... brush, roller, spray, or dip with appropriate
viscosity adjustment Restrictions.......................... Not restricted by WHMIS or TDG, not a hazard,
no RTK or SARA restrictions VOC...................................... zero according to EPA method 24, and ASTM
D-2359 Coverage
(theoretical)........... 770
square feet per This primer may be
top-coated immediately or even self-top-coated. It has an outstanding
weather-ability. The only caution is that it should not be applied to metals
that have a fresh coating of oil or mold release, as is common practice from
some steel manufacturing plants. In these cases the metal should be pre-cleaned
to remove the deposits or left outdoors to weather away these deposits before
priming. In our testing the anti-corrosive properties were still attained when
applied over oily surfaces but this is to be avoided wherever possible.
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