AQUA-THERM BC-365 is a water soluble modified polyester varnish. This environmentally friendly varnish was especially developed for its excellent stability.
Features and advantages:
- Excellent moisture resistance
- Outstanding adhesion and flexibility
- Good bonding strength
- Excellent stability
- Fast curing cycle
- Flashpoint over 200°F
- MW-35 wire UL approved, compliant with ASTM D-3251 for twisted pair wire-180°C rating, and spiral coil-200°C rating. UL system can reach up to 220°C.
Product characteristics:
- Color/appearance when delivered: Transparent amber
- Percentage of solids: 65-75
- Specific gravity at 70°F: 1.11
- Viscosity at 77°F with Brookfield RTV Spindle #2 and 10rpm speed: 1,000-5,000 cps
- Coating thickness per side: 1-3 mils
- Drying time on copper strip at 300°F: 10-20 minutes
- Diluent: Water
- pH value: 8-10
Electrical characteristics:
Dielectric strength in dry state, compliant with ASTM D-115, measured in volts/meter:
Dry state: 3000
Wet state: 3000
Mechanical performance:
Bonding strength of MW-35 wire spiral coil after thermal curing, compliant with ASTM D-2519:
Temperature at 25°C: 30 pounds
Temperature at 155°C: 10 pounds
Applications:
The following cycle is recommended as a starting point for treating most equipment, but is for reference only:
Preheat the parts to 220°F.
Cool down to 110°F.
Soak in the varnish for 5-20 minutes.
Drain for 5-20 minutes.
Bake* for 4-6 hours at 275°F, or* for 2-4 hours at 300°F, or* for 1-3 hours at 325°F.
*Time is calculated from when the equipment reaches the baking temperature.
Dilution and paint maintenance:
For optimal results, BC-365 should be diluted with regular tap water before use. A starting solid content of 35% is recommended. Diluting one part water with one part varnish will result in approximately 35% solid content. After dilution, the pH value should be checked using a pH meter. If necessary, DOLPH’S VM-3008 pH adjuster should be used to adjust the pH to 9-10. If the pH of the local tap water is low, DOLPH’S T-362 diluent can be used for dilution.
