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Aliphatic polyurethane acrylate
B-221D
Product features:
B-221D is a difunctional polyurethane acrylate with a medium molecular weight, featuring a polycarbonate structure. It exhibits relatively fast curing speed, resistance to boiling water, and resistance to yellowing.
Recommended use:
Vacuum electroplating UV primers, plastic UV coatings, and more.
Shelf life:
Store at room temperature, sealed and protected from light. Shelf life: 6 months.
Packaging specifications:
200L packaging drum; 20L packaging drum.
Precautions:
B-221D will crystallize when stored at low temperatures for extended periods; heating can restore its transparency.
Product Specifications:
| Project | Indicator | Detection method |
|---|---|---|
| Appearance | Transparent liquid | Visually |
| Color (APHA) | ≤80 | GB/T 3143-1982 (Platinum-Cobalt Method) |
| Viscosity (cps/60℃) | 3000-4500 | GB/T 2794-2013 |
| Acid value (mg KOH/g) | ≤2.0 | GB/T 6743-2008 |
| Specific gravity (g/cm3) | 1.07 ± 0.02 | GB/T 6750-2007 |
| Refractive index (25℃) | 1.478 ± 0.005 | GB/T 614-2006 |
| Active ingredient (%) | 100 | Theoretical value |
| Functionality | 2 | Theoretical value |
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