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Zinc Borate
Property: 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.[2] It is an anti-dripping and char-promoting agent, and suppresses the afterglow. In electrical insulator plastics it suppresses arcing and tracking.
In halogen-containing systems, zinc borate is used together with antimony trioxide and alumina trihydrate. It catalyzes formation of char and creates a protective layer of glass. Zinc catalyzes the release of halogens by forming zinc halides and zinc oxyhalides
Packing and storage: Packed in 25kg bag or large plastic woven bag.Transport and storage as common chemicals.
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Item\Specification |
ZB3.5H2O |
ZB7H2O |
ZB3H2O |
|
Zinc Borate % |
98.5% |
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|
ZnO % |
36.0-39.0 |
32.0-35.0 |
44-47 |
|
B2O3 % |
45.0-48.0 |
40.0-43.0 |
37.5-40 |
|
Appearance water%≤ |
0.5 |
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|
Weight loss on ignition |
13.5-15.5 |
24.0-26.5 |
14-16 |
|
Particle sizeμm |
2-5 6-10 |
3-5 |
3-5 |
|
Melting point |
980 |
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|
Loss crystalline water temperature > |
320 |
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|
Refractive index |
1.58 |
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|
Screen floating≤ |
0.01 |
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|
Cd ppm≤ |
5 |
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|
Arsenic ppm ≤ |
1 |
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|
Fe ppm ≤ |
15 |
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|
Pb ppm≤ |
10 |
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