TABLE I
REQUIREMENTS FOR HIGH BUILD ACRYLIC COATINGS (HBAC)
Test
Minimum Requirement
(and Maximum where indicated)
Resin System (ASTM D 2621)
Waterborne 100% Acrylic
Percent Volume Solids (ASTM D 2697)
58%
Volatile Organic Compound, max.
150 g/l 1.25 lbs/gal
(ASTM D 3960)
White (FED-STD-595)
37925
Yellow (FED-STD-595)
33538
Shore D Hardness (ASTM D 2240)
45
1/8 inch Mandrel Bend @ 5 mils
No visual defects at bend
Dry Film Thickness (DFT, one-week
(Conditions @ ASTM D 3924)
cure (ASTM D 522, Method B)
Adhesion to Concrete and Asphaltic
0.97 MPa 140 psi or 100%
Pavements (ASTM D 4541)
cohesive failure in pavement
Accelerated Weathering, Yellow,
Max. color loss to 33655
2500 Hours UV Exposure
(FED-STD-595)
(ASTM G 53: see note 1)
Water Absorption @ 168 Hours
9.0% max. weight increase
Immersion Tap Water (ASTM D 471)
(conditions @ ASTM D 3924)
Application @ 1650 microns 65 mils
No visual cracking or curling
Wet,One Coat, One-week Cure,
(conditions @ ASTM D 3924)
(see note 2)
No Pick-Up @ 630 microns 25 mils
Wet 10 minutes max.
(ASTM D 711)
Lead (ASTM D 3335)
0.06% max.
Cadmium (ASTM D 3335)
0.06% max.
Chromium (ASTM D 3718)
0.00%
Notes:
(1)
Properly mix and apply yellow paint at 250 microns +/- 50 microns 10
mils +/- 2 mils DFT over a suitably sized, clean aluminum substrate (ASTM D
823), and cure for a minimum of 48 hours: four individual yellow samples
shall be prepared. Expose three samples to continuous Ultraviolet (UV) light
for 2500 hours, without cycles condensation, in accordance to ASTM G 53:
UVA-340 lamps shall be used in the testing apparatus. Following exposure,
compare the three exposed samples to the "one" non-exposed sample using
FED-STD-595 colors 33538 and 33655 as visual references: evaluate exposed
samples for degree of visual color loss. Yellow paint shall receive a
passing rating if each exposed sample appears equivalent to the non-exposed
SECTION 02761N
Page 18
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