Zinc Borate Flame Retardant Synergist

High-purity micron-sized zinc borate flame retardant synergist is a functional eco-friendly additive produced by Taixing. Based on an in-depth understanding of zinc borate chemistry, it breaks through its traditional role as a "synergist," reshaping flame retardant reaction pathways, optimizing heat management, and reinforcing protective barriers to elevate the efficiency of the entire flame retardant system to new heights. Unlike conventional zinc borate, it can be combined with mainstream halogen-free flame retardants such as magnesium hydroxide, aluminum hydroxide, and phosphorus-nitrogen systems, significantly enhancing the smoke suppression, drip resistance, and char-forming performance of the flame retardant system. Achieving the dual benefits of "low dosage + high flame retardant rating," it serves as a strategic material for cost reduction, performance enhancement, and balanced efficiency.

Core strengths

1. High collaborative efficiency, reducing overall costs

-When used in combination with magnesium hydroxide/aluminum, the total amount of inorganic flame retardants added can be reduced by 20% -30%, while maintaining the UL94 V-0 flame retardant rating and reducing material production costs.

-The recommended addition amount is only 5% -8% (based on the total mass of the material), which is much lower than the proportion of traditional synergists added, and does not affect the processing fluidity and molding effect of the substrate.

-It has a significant synergistic effect on the phosphorus nitrogen based expansion flame retardant system, which can increase the oxygen index of the material by 3-5 units and make the flame retardant performance more stable.

2. Zero halogen environmental protection, global compliance certification

-100% halogen-free, phosphorus free, and heavy metal free. No toxic gases such as hydrogen halides or cyanides are released during combustion. The smoke density (DS) is reduced by more than 40% compared to halogen flame retardant systems.

-Fully certified by authoritative domestic and international standards such as EU RoHS 2.0, REACH (224 SVHC), US UL94, ASTM, and China GB/T 2408-2022, it can be directly used for product production in markets such as North America, Europe, and Southeast Asia.

-The combustion residue is a stable zinc borate salt with no secondary pollution, which is in line with the global trend of green environmental protection.

3. Excellent compatibility to ensure substrate performance

-After surface modification treatment, it has excellent compatibility with most polymer materials such as PE, PP, PVC, EVA, rubber, epoxy resin, etc., and is evenly dispersed without agglomeration.

-It does not reduce the core mechanical properties such as tensile strength, impact toughness, and elongation at break of the material, and does not affect the subsequent processing techniques such as coloring, printing, and laminating of the product.

-Suitable for various production processes such as extrusion, injection molding, rolling, coating, etc., without the need to modify existing production equipment, reducing the cost of enterprise technological transformation.

4. Stable weather resistance, widely applicable in various scenarios

-The product has stable chemical properties, high temperature resistance (decomposition temperature ≥ 300 ℃), moisture resistance, UV aging resistance, and a shelf life of up to 5 years. Storage and transportation do not require special conditions.

-It can maintain stable performance within a wide temperature range of -40 ℃ to 200 ℃, and is suitable for material application requirements in high and low temperature environments.

Mechanism of action

1. Collaborative thermal management: expanding and extending the protection window

·Time dimension extension: For endothermic flame retardants such as ATH/MDH, their dehydration endothermic peaks are concentrated and brief. ZB extends the overall heat absorption duration of the system in a relay manner through its own endothermic decomposition at different temperature ranges (such as around 300 ° C and above), constructing a wide thermal buffer zone from the initial decomposition of the material to the onset of intense combustion.

·Space heat homogenization: The molten borate promoted by it can quickly spread in the condensed phase, like a "thermal diffusion layer", quickly conducting and dispersing the heat of local hotspots (such as ATH dehydration points), preventing the matrix polymer from rapidly decomposing and producing flammable gases due to local overheating.

2. Barrier structure enhancement: from "physical filling" to "chemical bonding" ceramic layer

This is the core of efficiency improvement. In traditional systems, the Al₂O₃ residue after ATH dehydration is loose and lacks strength.

·In situ ceramicization: ZB generates active melts such as B₂O₃ at high temperatures, which can react with Al₂O₃, MgO, etc. to generate a high-strength aluminum borate/magnesium borate ceramic phase with a specific crystal structure in situ.

·Building a composite barrier: This ceramic phase interweaves and interlocks with the carbon layer formed by catalysis, forming a dense, hard, and heat-resistant ceramic carbon composite barrier. Its insulation and oxygen isolation efficiency is much higher than that of a simple mixture of loose oxide residue and carbon layer, which is the physical basis for achieving "reduction and efficiency enhancement".

3. Optimization of gas-phase interactions: free radical quenching and fuel modification

·Synergistic quenching: In synergy with gas-phase flame retardants such as phosphorus nitrogen systems, boron species can more efficiently capture key free radicals in combustion chain reactions, altering the equilibrium of gas-phase reactions.

·Fuel pathway intervention: While catalyzing the formation of more aromatic carbon structures in the condensed phase, it reduces the production of light hydrocarbon fragments that can be used as gas-phase fuels, thereby reducing the "fuel supply" from the source.

Frequently Asked Questions

Q1: What are the advantages of zinc borate flame retardant compared to antimony oxide?

A1: Although antimony oxide has high synergistic efficiency, it belongs to heavy metal compounds with high toxicity and environmental risks; This product is halogen-free, low toxic, environmentally compliant, and can replace 30% -50% of antimony oxide usage, significantly reducing production costs and achieving better smoke suppression effects.

Q2: Will adding it affect the transparency of the product?

A2: No. The product is a micrometer sized white powder with excellent dispersibility. Adding an appropriate proportion to transparent substrates such as transparent PP and PVC will not affect the material's transparency and appearance texture.

Q3: Does synergist mean I can infinitely reduce the amount of main flame retardant used?

A3: No, there is an "optimal synergy interval" for synergists. Our experiment shows that the efficiency curve usually exhibits an inverted "U" shape. At the beginning, with the addition of synergists, the efficiency of the main flame retardant increases rapidly (can be reduced); But after exceeding the optimal point, continuing to add synergists is not enough to replace the basic function of the main flame retardant, and the system performance may decrease. One of our core technical services is to help customers accurately find the optimal balance between cost and performance through response surface experiment design.

Q4: Will the efficacy of the product decrease after long-term thermal aging or humid heat aging?

A4: ZB itself has excellent chemical stability and low mobility. As long as it is well dispersed in the system, its synergistic effect is long-lasting. Because it primarily functions through chemical reactions such as ceramicization, the products of these reactions are stable throughout the material's lifespan. In fact, due to its promotion of more stable carbon/ceramic layer formation, it often enhances the overall long-term thermal aging performance of the material.

If you are looking for flame retardant enhancers, zinc borate enhancers, flame retardant synergists, environmentally friendly flame retardant enhancers, zinc borate compound solutions, plastic flame retardant enhancers, cable material flame retardants, etc., Taixing will be your best choice. We will offer the most favorable price and welcome you to negotiate cooperation!