Derogrund Silikon

Primer on a special phenylmethylpolysiloxan resin basis

General information
Derogrund Silikon

Field of application

  • Protection against corrosion for steel ,aluminium, and blasted high grade steel in high temperature areas.
  • Primer in a multi-layer silicone system

Product properties

  • Contents silicon
  • Resistance to light acids
  • Resistance to weak bases
  • Resistance to condensation
  • Coating systems for corrosivity category C3
  • Coating systems for high temperatures
  • Good weather resistance
  • Fast drying
  • Fast recoatability
  • Recoatability: after cross linking at 180°C not overcoatabel without slightly sanding

Technical Specification
Derogrund Silikon

Colours ca. RAL 7040, redbrown, black, grey, for request.
Colour deviation (Colour deviations may occur in the range of high temperatures due to the restricted temperature resistance of the pigments)
Flash point >23 °C
Temperature stability Up to 400 (short-term up to 500) °C
Gloss Mat
Potential dry film thickness in one working process 25 up to 40 µm
Viscosity Appr. 80 sec running time (DIN 4 mm pot)
Density in kg/l 1,55
Solid content in % 71
Solid volume in % 49
Theoretical spreading capacity
  • 12,25 m²/l at 40 µm DFT
  • 7,9 m²/kg at 40 µm DFT
Recommended film thickness 75 µm WFT corresponds to 40 µm DFT
Drying (DIN EN ISO 1517) 30 µm DFT
Dust-dry (Tg1) After 15 min
Touch-dry (Tg4) After 25 min
Dry (Tg6) After 35 min
Accelerated drying 30 min., required at least 180°C
Interval for overcoating
  • after 90 min with siliconresin coatings without forced intermediate drying

Note

  • The specifications are based on standard atmospheric conditions 23/50, DIN 50014.
  • Lower temperatures and/or higher humidity will prolong drying and hardening.

Safety information
Derogrund Silikon

(See Security Data Sheet)

VOC-level Appr. 446 g/l
Solvent content Appr. 29 % by weight
Aromatic content Appr. 20 % by weight

Storage
Derogrund Silikon

Storage

  • In dry, cool rooms, if possible frost-proof
  • Ensure good ventilation

Shelf life

  • 6 month from date of delivery when in unopened original containers in cool and dry conditions

Application methods
Derogrund Silikon

Airless spraying

  • Flow pressure 160 - 180 bar
  • Nozzle size 0,009 - 0,011 inch (0,23 - 0,28 mm)
  • Spraying angle according to the geometry and size of the object to be laquered

Compressed air spraying

  • Spraying pressure 3 - 5 bar
  • Nozzle size 1,5 - 1,8 mm
  • Adjust to spraying viscosity (appr. 40 s DIN 4 mm) adding appr. 5 % Derozink-Verdünnung (two component products: after mixing)

Electrostatic application

  • Application is not possible

Dipping

  • Can not be applied as delivered

Other methods

  • Roller and brush application for repair work is possible

Thinner

  • Max. 7% Derozink-Verdünnung

Cleaning

  • Rinse immediately with Derozink-Verdünnung
  • Residues are dissolvable with Derozink-Verdünnung

Preparation of support

  • Shot blasting to a purity according to SA 2½
  • Mill scale, welding residues, dust and dirt on the surface which might reduce adhesion have to be carefully and thoroughly removed

General remarks

  • During coating and drying the humidity should be min. 10 % / max. 85 %
  • During coating and drying the environmental temperature should be min. 5°C / max. 30°C
  • Object temperature at least 3° C above dew point.

Example for a system

  • Primer coat: Derogrund Silikon
  • Finish coat: Derilux Silikon

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The general information and descriptions contained in this specification are provided to the best of our knowledge. Our information and specifications do not constitute warranted characteristics in the legal sense. Any advice for preparation and application which may be provided verbally, in writing or by means of experiments is of general nature only, and any property rights of third parties are also to be regarded in this context. Our general instructions do not release you from your obligation to check the suitability of the products supplied by our company for the intended methods and purposes of application. Particular in those cases when our supplied material will be applied with products from other sources. The products are prepared, applied and used outside of our sphere of control and thus fall solely within the user´s scope of responsibility.
Our general terms of sale and delivery apply as agreed.

Quick access to product information.

Dr. Demuth Derisol Lackfarben GmbH & Co. KG

Hillerser Straße 8, 37154 Northeim
Telefon +49 5551 / 97940
Telefax +49 5551 / 979430

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