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:

1. Excellent moisture resistance

2. Outstanding adhesion and flexibility

3. Good bonding strength

4. Excellent stability

5. Fast curing cycle

6. Flashpoint over 200°F

7. 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:

1. Color/appearance when delivered: Transparent amber

2. Percentage of solids: 65-75

3. Specific gravity at 70°F: 1.11

4. Viscosity at 77°F with Brookfield RTV Spindle #2 and 10rpm speed: 1,000-5,000 cps

5. Coating thickness per side: 1-3 mils

6. Drying time on copper strip at 300°F: 10-20 minutes

7. Diluent: Water

8. 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.