PVDF Steel Specifications

System Overview

The Koolnar™ PVDF coil coating system manufactured and distributed globally by Continental Coatings Inc. and Yung Chi Paint and Varnish Manufacturing Company Ltd., is a Premium 70% PVDF coil coating system engineered for monumental building product applications and severe exterior environments that require long life and extended warranty coverage. The Koolnar™ system uses licensed Kynar® and Hylar® PVDF Fluoropolymer technology which is ultra-resistant to UV radiation and natural weathering. Koolnar™ uses only the highest-quality, long-lasting ceramic and metallic pigmentation to insure optimal exterior color fastness and longevity. This system is also available in multiple coats and various specialty high-build systems. Koolnar™ may be applied over the Universal PU-11 High Molecular Weight Urethane Primer or PU-30 High-Build Urethane Primer Systems for extreme environment and extra-long service life warranted building product applications.

Application Parameters

The Koolnar™ system is designed for trouble-free coil coating line application and has been run for well over two decades on new and old coil lines around the world. Standard topcoat DFT is .70-.80 mils, which allows for optimal application consistency, color stability and exterior performance. Koolnar™ was formulated to provide improved stain resistance and cleanability, as well as scratch resistance and surface toughness. Superior primer corrosion resistance and substrate adhesion, along with chemically enhanced topcoat intercoat adhesion greatly minimize field scratch and wet stack storage complaints and handling, transporting and storage related claims.

Commercial Uses

The Koolnar™ system can be formulated in standard and medium, as well as low gloss/low sheen finishes and supplied in limited colors. This premium coating supports an extended warranty and can be applied to a variety of adequately cleaned and treated metal substrates including: Hot Dipped Galvanized, ZnAl, Galfan®, ZAM®, Aluminum and Stainless Steels. Koolnar™ is formulated with IR Reflective COOL ROOF ceramic pigment technology and can be designed to meet and exceed U.S. Energy Star™ requirements. It is most ideal for high-end, construction-related products like composite panels, high UV exposure roofing and acidic/alkaline corrosive environments like industrial manufacturing facilities and power plants.

KOOLNAR™ COIL COATING SYSTEM
Application
Specifications Test Result
Application Method N/A Reverse Roll Coat
Substrate N/A Aluminum, HDG, Galvalume®, Galfan®, ZAM®
Pretreatment Standard Clean and Treat Chrome or Approved Non-Chrome
ASTM D 4138 Dry Film Thickness Top Coat: 0.7 to 0.8 mils
Primer: 0.2 to 0.3 mils
Total System: 0.9 to 1.1 mils
ASTM D 4212 Viscosity (No. 2 Zahn Cup) 25 to 45 seconds
ASTM D 1475 Weight Per Gallon 9.0 to 12.0 lbs Per Gallon
ASTM D 2697 Solids Per Volume 35 to 42%
ASTM D 2369 Solids Per Weight 45 to 65%
Reducing Thinner Reducing Solvent Isophorone/DBE
ASTM D 3960 VOC (Theoretical) 4.0 to 4.8 lbs Per Gallon
Clean-up Solvent N/A Aromatic/Ketone
Peak Metal Temperature N/A 465 to 485 F


Technical Data
Specifications Test Result
ASTM D 523 Specular Gloss at 60 6 to 35
ASTM D 3363 Pencil Hardness F to 2H
ASTM D 4145 T-Bend 1T to 4T with No Loss of Adhesion
ASTM D 3359 Cross Hatch Adhesion No Loss of Adhesion
ASTM D 2794 Reverse Impact Galvalume or HDG: 3x Metal Thickness Inch-Lbs, No Loss of Adhesion • Aluminum: 1.5x Metal Thickness Inch-Lbs, No Loss of Adhesion
ASTM D2247 Humidity Resistance 1,000 hrs
Humidity Resistance 3,000 hrs
Galvalume or HDG: Creep from Scribe < 1/8 in. (3 mm),
No Field Blistering • Aluminum: Creep from Scribe < Creep from Scribe < 1/8 in. (3 mm), No Field Blistering
ASTM B 117 Salt Spray Resistance 1,000 hrs
Salt Spray Resistance 3,000 hrs
Galvalume or HDG: No Blistering • Aluminum: No Blistering
ASTM D 2244
ASTM D 4214
South Florida Exposure Color: No More than 5 Hunter (E) Units
Chalk: Rating No Less than 8
ASTM D 870 Water Immersion 100 F 500 hrs No Field Blisters with Minimal Color Change
ASTM D 1308 Chemical Resistance (15 mins) No Significant Color Change
ASTM E 84 Flame Spread Classification Class I or A
ASTM D 968 Abrasion Resistance Total Sand = 65 +/- 5 liters (Dft Dependent)
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