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TEKNOBLADE REPAIR 9000-20

Elastomeric coating

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TEKNOBLADE REPAIR 9000-20 is a two-pack, solvent-free elastomeric coating designed for dispenser gun application. Intended for use as a repair product for refurbishment of Leading Edge Protection on Wind Turbine Blades. Substrate types: Tested and approved on Fibre reinforced polymer and previously lacquered surface.

Intended for use as a repair product for refurbishment of Leading Edge Protection on Wind Turbine Blades.

TEKNOBLADE REPAIR 9000-20 withstands impacts and hard abrasion. It will cure down to a temperature of -8 °C. The coating will yellow and chalk over time when exposed to UV light. However, the coating will still maintain protection against rain erosion despite the discoloration. TEKNOBLADE REPAIR 9000-20 is usually applied in 2-3 mm thickness.

Surface preparation

Cleanliness: Any contamination that might be detrimental to surface preparation and coating must be removed prior to application. The cleaning method used shall ensure that water-soluble salts, dust, grease, and oils are fully removed. Surface roughness: dense and uniform surface roughness free of dust. Recommended sandpaper grit size: 60-80. Coarse, dense, and clean roughness is mandatory for optimum and sound adhesion. Additional instructive information for surface preparation and application can be found in the Teknos Application Guide.

Application

Vertical surfaces: On vertical surfaces the required thickness of coating is achieved by a single pass with the dispenser gun. The components must be kept at a temperature between +15°C and +50°C before use to ensure an efficient fluid flow through the static mixer tube and application tip. NOTE: The viscosity of the product depends on the temperature. The film thickness may be controlled on a reference plate (steel) with a dry film gauge. Recommended single-pass film thickness 2-4 mm. The curing process is exotherm and creates some heat depending on the applied film thickness. The cure will be slower at lower film thickness. The mixing ratio and degree of curing can be controlled by measuring the hardness of the coating (Shore A method). At a temperature of +23°C a hardness of minimum 80 Shore A should be reached after 1 hour.

Application conditions

The surface which is to be coated must be dry and the substrate free of any moisture content. During the application and drying period, the temperature of the ambient air and the surface shall be above -8°C and below +50°C. The relative air humidity below 85%. The temperature of the surface to be treated must be at least +3°C above the dew point of the ambient air. The place and time of the preparation are to be chosen so that the prepared surface will not get dirty or damp before the subsequent treatment.

Storage

The storage stability is shown on the label. Must be stored tightly closed and kept cool and dry. Storage temperature is +5°C - +35°C.
Solids abt. 100 % by volume
Total mass of solids abt. 1080 g/l
Volatile organic compound (VOC) abt. 0 g/l
Pot life 120 sec. (+23 °C)
Mixing ratio 1:1 by volume (comp. A : comp. B)
Hardener Comp. B: TEKNOBLADE REPAIR HARDENER 7000
Gloss Gloss
Practical spreading rate The values depend on the application technique, surface conditions, overspray, etc. To obtain sufficient rain erosion protection – a film thickness below 1.5 mm is not recommended.
Drying time – dust free Approx. 6 min.
Drying time – fully cured Approx. 1 day
Colours White.
Safety markings See safety data sheet.