Anhydrous Zinc Borate has become one of the most reliable multifunctional additives across plastics, rubber, coatings, and engineered materials. Its excellent flame-retardant, smoke-suppressant, anti-tracking, and corrosion-resistant properties make it a critical ingredient for manufacturers seeking higher performance and compliance with industrial safety standards. At Shandong Taixing Advanced Material Co., Ltd., we provide high-purity Anhydrous Zinc Borate designed for stable performance under demanding processing conditions.
Anhydrous Zinc Borate offers a unique combination of functions that enhance both safety and material durability. Unlike hydrated borates, the anhydrous form provides superior thermal stability, making it compatible with high-temperature polymer processing. It supports halogen-free flame-retardant systems and works synergistically with alumina trihydrate, magnesium hydroxide, and zinc oxide to produce improved flame retardancy with reduced smoke generation.
Key Functional Advantages
Effective flame retardancy in halogen-free systems
Excellent smoke and toxicity suppression
High thermal stability (suitable for high-temperature extrusion and molding)
Anti-tracking performance for electrical insulation
Corrosion resistance for long-term durability
Synergistic with other flame retardants
Below is a standard specification table commonly supplied by Shandong Taixing Advanced Material Co., Ltd.:
Product Parameters
| Parameter | Specification |
|---|---|
| Chemical Name | Anhydrous Zinc Borate |
| Appearance | White, free-flowing powder |
| Chemical Formula | 2ZnO·3B₂O₃ |
| Zinc Content (as ZnO) | ≥ 37% |
| Boron Content (as B₂O₃) | ≥ 48% |
| Particle Size (D50) | 3–8 μm (customizable) |
| Loss on Ignition | ≤ 1.0% |
| Melting Point | Approx. 980°C |
| Thermal Stability | Suitable up to 500°C |
| Moisture Absorption | Very low |
Typical Application Fields
PVC cables and wires
Engineering plastics (PA, PBT, PET, PC)
Rubber products
Epoxy and polyester systems
Intumescent coatings
Electrical insulation materials
Anhydrous Zinc Borate acts through multiple mechanisms to enhance the functional properties of polymers.
1. Flame-Retardant Effect
It releases protective glassy layers during combustion, reducing oxygen penetration and slowing the spread of flames.
2. Smoke Suppression
It minimizes the formation of black smoke and harmful gases, improving safety in enclosed environments.
3. Electrical Insulation
Its anti-tracking properties prevent electrical leakage, making it ideal for high-performance cable compounds.
4. Synergistic Performance
When combined with other flame retardants, it increases char formation and improves overall thermal stability.
As global industries shift toward safer, halogen-free, environmentally friendly materials, demand for Anhydrous Zinc Borate continues to rise. Manufacturers prefer it due to its:
Non-toxic and eco-friendly characteristics
Compliance with international flame-retardant standards
Compatibility with a wide range of polymers
Ability to improve both processing and end-use performance
Shandong Taixing Advanced Material Co., Ltd. supports this trend by offering consistent quality, customized particle size options, and stable supply for global customers.
1. What is Anhydrous Zinc Borate mainly used for?
It is primarily used as a flame retardant, smoke suppressant, and anti-tracking agent in plastics, rubber, coatings, and cable insulation materials. Because it is anhydrous, it works well under high-processing temperatures where hydrated borates would decompose.
2. Why choose Anhydrous Zinc Borate instead of hydrated zinc borate?
The anhydrous type offers higher thermal stability, making it suitable for engineering plastics and high-temperature polymer processing. It also provides better long-term durability and reduced moisture sensitivity.
3. How should Anhydrous Zinc Borate be added to polymers?
Typical addition levels range from 5% to 20%, depending on the polymer type and the desired flame-retardant performance. It can be added during compounding, extrusion, or injection molding. Shandong Taixing Advanced Material Co., Ltd. provides guidance based on specific application requirements.
4. Does Anhydrous Zinc Borate affect mechanical properties?
When properly dispersed, it maintains mechanical strength and can even improve thermal stability. It works synergistically with other additives, enabling better flame resistance without compromising product quality.
For technical consultation, product specifications, or customized supply of Anhydrous Zinc Borate, feel free to contact Shandong Taixing Advanced Material Co., Ltd. Our team provides professional support for global industrial users.
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