SynChem – Resins & Varnishes Synthite AC-41 Polyurethane varnish

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

Synthite AC-41 has the following excellent properties:

  • fast drying - units can be handled in 30 min.
  • easy application (dipping, brushing, spraying)
  • hohe Temperaturbeständigkeit
  • superior abrasion resistance
  • excellent adhesion to most surfaces
  • transformer oil resistance ASTM D 155-55
  • corrosion and humidity resistance
Download datasheet

Application

Electrical engineering and electronic devices.

Standards

Class H (180 °C) acc. UL 1446, MW 35-C, Twisted Pairs.

Delivery forms

4.5 kg, 22.5 kg and spray bottles on request.

Base

Clear

Color

Clear

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