ALEXIT® BladeRep Topcoat 12 Orange RAL 2009 Polyurethane coating

1. Introduction

ALEXIT® BladeRep® Topcoat 12 is designed specifically for coating blades where a superior product with chemical, UV, abrasion and mechanical resistance is required. This two-component polyurethane topcoat meets or exceeds OEM standards and provides applicators with the ideal product for blade repairs.

2. Range of application

ALEXIT® BladeRep® Topcoat 12 is designed as a final topcoat on wind turbine rotor blades. The material is very elastic and has good chemical resistance values. It can be applied by spray, roller or brush on spot repairs, or as a final coating over the entire surface of a blade.

3. Color

ALEXIT® BladeRep® Topcoat 12 is available in standard factory packaged colors matching standards of OEM turbine blade manufacturers. Custom colors may be available upon request.

4. Coverage  

Recommended dry film thickness: 100 (±20) μm (4 mil).

5. Substrate pre-treatment

Sand the surface with 120 grit paper prior to applying ALEXIT® BladeRep® Topcoat 12. The surface must be clean, dry and free from dust, grease, oil and other contaminates. Topcoat 12 may be applied over all ALEXIT® BladeRep® products and/or any properly prepared surface.

6. Trade names/part no.

Base material BR12XX* ALEXIT® BladeRep® Topcoat 12
Hardener BR12H0 ALEXIT® BladeRep® Hardener 12
Standard Thinner BR12T4 ALEXIT® BladeRep® Thinner 12 Medium
Fast Thinner BR12T7 ALEXIT® BladeRep® Thinner 12 Fast
*XX See Range Sheet for Color Selection

7. Mixing ratio

For mid-size and large units:

Spraying and Brush / Roll: Mixing by Volume: 3 Parts ALEXIT® BladeRep® Topcoat 12 BR12XX
1 Part ALEXIT® BladeRep® Hardener 12 BR12H0
Reduction up to 10% as necessary with:
ALEXIT® BladeRep® Thinner 12 Medium BR12T4
(for faster drying) ALEXIT® BladeRep® Thinner 12 Fast BR12T7
Example: 3:1:0.4
Mixing by Weight: 4 Parts ALEXIT® BladeRep® Topcoat 12 BR12XX
1 Part ALEXIT® BladeRep® Hardener 12 BR12H0
Reduction up to 10% as necessary with:
ALEXIT® BladeRep® Thinner 12 Medium BR12T4
(for faster drying) ALEXIT® BladeRep® Thinner 12 Fast BR12T7
Example: 4:1:0.5

For kits:

Prior to mixing, shake vigorously by hand for 1 minute. Puncture both container lids, empty entire hardener into base and mix thoroughly. Depending on environmental conditions use of BR12T4 or BR12T7 is recommended.
For all package sizes: Mix thoroughly for proper cure!

8. Application

• Spray: Gravity or siphon feed gun:
Nozzle size: 1.7 - 2.2 mm (0.070 – 0.086 inch)
Atomizing pressure: 3.0 bar (42 psi)
Airless:
Nozzle size: 4/13 - 5/15
Material pressure: 125 -150 bar (1812 - 2175 psi)

• Brush / Roll: High quality solvent resistant brushes and rollers.
Application conditions: 15-35 °C (60-95 °F) and 20-85 % relative humidity. The minimum application condition should be 3 °C (5.4 °F) above dew point.
If applying the product in conditions which are not listed above, please consult your ALEXIT® BladeRep® representative.
Application process for Apply 2 coats of ALEXIT® BladeRep® Topcoat 12 to a wet film thickness (WFT) of 100 – 125
spraying / rolling: μm spraying / rolling: (4 - 5 mils) each. Allow a Flash-off time of 45 minutes at 23°C (73°F) between each coat before applying the next coat. The total dry film thickness should be (DFT) approx. 100 (±20) μm (4-5 mils) for a 2-coat application. If applying by roller a short nap foam roller is recommended.
After application of ALEXIT® BladeRep® Topcoat 12, no additional process is required before the blade can be put into operation. Before taking turbine into operation, ALEXIT® BladeRep® Topcoat 12 needs time to cure thoroughly. The curing time depends on environmental conditions.

9. Pot life

120 min at 23 °C (73 °F)

10. Drying time

11. Packaging

Armazene em embalagens originais fechadas a uma temperatura de 5 - 35 ° C (41 - 95 ° F) (de acordo com DIN EN 3840: 2007).

Type of supply

ALEXIT® BladeRep Topcoat 12 Orange RAL 2009 x 1 kg, supplied in metallic kegs with hardener + 70 g of reactive diluent BR12T7

ALEXIT® BladeRep Topcoat 12 Orange RAL 2009 x 15 kg, supplied in metallic kegs of 12 kg paint and 3 kg hardener + 1,5 kg of reactive diluent BR12T7