Zinc Borate
Molecular Formula 2ZnO·3B2O3·3.5H2O
Brand No.: ZB-2335
zinc borate is a low toxicity, white crystalline, inorganic compound primarily used as a flame retardant and smoke suppressant in plastics and cellulose fibers, paper, rubbers and textiles. It is also used in paints, adhesives and pigments.
2. Technical Specification
| Technical requirements |
Test results |
| ZnO % |
37.5+/-0.5 |
37.58 |
| B2O3% |
47.5+/-1 |
47.46 |
| Appearance water% |
≤0.5 |
0.28 |
| Sieve Residue |
≤ 0.0005 |
0.0003 |
| Crystal water % |
14+/- 0.5 |
13.5 |
| Pb ppm |
≤ 10 |
6.3 |
| As ppm |
≤ 2 |
ND |
| Cd ppm |
≤ 5 |
1.8 |
| Cr ppm |
≤ 5 |
1 |
| P article size |
1-5 um |
2.35 |
| Whiteness% |
≥ 97 |
98.5 |
3. Applications
zinc borate is primarily used as a flame retardant in plastics and cellulose fibers, paper, rubbers and textiles. It is also used in paints, adhesives, and pigments. As a flame retardant, it can replace antimony trioxide as a synergist in both halogen-based and halogen-free systems. It is an anti-dripping and char-promoting agent, and suppresses the afterglow. In electrical insulator plastics it suppresses arcing and tracking.
4. Packaging / Transportation
Internal plastic with knitted exterior covered with film, with the net weight of 20kg, 25kg or 40kg.
Protected from damp, rainfall and package damage in transportation.
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