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SynChem – Resins & Varnishes

Synthite® AC-41 Polyurethane varnish

Synthite® AC-41 is an air drying finishing varnishes based on polyurethane.

Attributes

Synthite® AC-41 has the following excellent properties:

  • fast drying - units can be handled in 30 min.
  • easy application (Dipping, brushing, spraying)
  • hohe Temperaturbeständigkeit
  • hervorragende Resistenz gegen Abrasion
  • sehr gute Haftung auf den meisten Oberflächen
  • transformer oil resistance ASTM D 155-55
  • corrosion and humidity resistance
Application

Electrical engineering and electronic devices.

Standards

Class F (155 °C)

Delivery forms

Colour: clear
4.5 kg, 22.5 kg and spray bottles on request.

Storage

Store in cool dry place (max. 30 °C) away from direct sunlight. Protect from moisture and humidity. Shelf life is 36 months when stored in closed original container at max. 30 °C.

Hardening

Curing is possible in explosion protected environments under a fume hood at ambient conditions:
Air drying times at 25 °C:

  • 10 min. dust-dry
  • 1 h touch-proof
  • 48 h cured
Protection

Cured Synthite® AC-41 is biologically inactive and safe to health. Always refer to the safety data sheet and implement common protective measures when processing the varnish.

Cleaning

Clean tools with thinner T 200 in time. Maintenance and care of coating equipment, especially cleaning, must be carried out according to operational requirements. Always refer to the user manual of the equipment. 

Processing

When spray-coating with thinner T 200, Synthite® AC-41 is adapted to processing viscosities in common manual spraying nozzles. Usually you 20-25 % thinner. It is possible to adjust the viscosity with T200 for dip coating. Before longer air contact, ensure that the dipping bath surface does not become dry by placing a nitrogen blanket. Synthite® AC-41 is supplied ready-to-use for brushing application. Recommended coating thickness: less than 30-40 µm.

Always observe the specifications on the safety data sheet and relevant safety organisation regulations. 

Technical data
Mechanical
Coating thickness 
Unit of measure Conditions  Value  Test method 
µm    60-75 ASTM D-115
Chemical
Resistance  Resistance  Resistance  Resistance 
Conditions  Blistering  Rusting  Cracking  Test method 
Water no no no  
10 % sulfuric acid no no no ISO 4628/2-3-4
1% Natrium hydroxide no no no ISO 4628/2-3-4
saltwater no no no ISO 4628/2-3-4
Liquid phase
Dilution  Specific density  Viscosity  Viscosity  Viscosity 
Unit of measure Bedingung  Werte  Prüfmethode 
    4:1  
g/l  25 °C 900±20  
25 °C 50-65 Ford Cup 4
25 °C 40-60 ISO Cup 6
30 °C 40-50 Demmler Cup 1
Electrical
Dielectric strength  Dielectric strength 
Unit of measure Conditions  Value  Test method 
kV/mm  dry / 0.025 mm film thickness 80 ASTM D-115
kV/mm  after 24 h water immersion / 0.025 film thickness 48  

Dolphon®, SYNTHITE® are registered trademarks of John C. Dolph Company (Dolphs).