Zinc Borate ZB-2335

Zinc borate ZB-2335 is a customized and efficient flame retardant enhancer produced by Taixing, specifically designed to solve the pain points of "insufficient flame retardant accuracy, mechanical property degradation, and poor processing adaptability" in high-end materials. Different from the broad-spectrum adaptability of general-purpose zinc borate, this product is designed to meet the special needs of engineering plastics, high-end cable materials, and special fireproof coatings. It achieves three major breakthroughs: precise synergy, high thermal stability, and high interface compatibility. It can be compounded with magnesium hydroxide, phosphorus nitrogen based, and expansion flame retardants, significantly improving the carbonization strength, anti drip performance, and smoke suppression effect of the flame retardant system.

Flame retardant and efficiency enhancing mechanism

Patent customized crystal structure and modification process

Using hydrothermal directional crystal cultivation technology, the crystal structure of zinc borate ZB-2335 is precisely controlled to form a sheet-like single crystal morphology, with a specific surface area 45% higher than ordinary zinc borate and a 30% increase in the number of active sites; The supporting amino epoxy dual functional group silane grafting modification process constructs a dual active group layer on the crystal surface, while strengthening the interfacial bonding with polar and non-polar substrates, solving the industry problem of narrow adaptability of single functional group modifiers, and improving the synergistic flame retardant efficiency by more than 70% compared to general modified zinc borate.

Flame retardant and smoke suppression mechanism

1. High thermal stability and temperature control decomposition: Zinc borate ZB-2335 decomposes at a temperature of up to 310 ℃, far exceeding the general pentahydrate zinc borate (280 ℃), and can withstand the high temperature processing flow of engineering plastics at 220-280 ℃. Without premature decomposition, it can cause bubbles and yellowing of the product; Step by step dehydration and heat absorption during the combustion stage, precise control of the thermal decomposition rate of the substrate, and reduction of combustible gas generation from the source.

2. Dense carbon layer enhanced barrier: The boronic ester groups generated by decomposition crosslink with the molecular chains of the substrate, promoting the formation of a high-strength ceramic carbon layer. This carbon layer has a dense structure and strong adhesion, which can effectively block the bidirectional transfer of oxygen and heat, while suppressing the escape of smoke particles and toxic gases. The integrity of the carbon layer is 50% higher than that of general zinc borate.

3. Targeted free radical quenching: Boron containing gas-phase components can target and capture active free radicals such as · OH and · H in the combustion chain reaction, cutting off the flame propagation path. Especially for phosphorus nitrogen flame retardant systems, it has a synergistic amplification effect, increasing the oxygen index of the material by an additional 5-7 units.

4. Anti dripping and anti spreading protection: During the melting and combustion stage of the material, zinc borate ZB-2335 combines with the melt to form a high viscosity glassy composite, greatly increasing the surface tension of the melt and effectively preventing the melting and dripping of engineering plastics such as PP and ABS. Through UL94 V-0 vertical combustion test, there is no dripping phenomenon, eliminating the risk of secondary fire.

Core strengths

1. Customized and precise collaboration, breaking through industry bottlenecks in performance

-When used in combination with phosphorus nitrogen based expansion flame retardants for ABS household appliance shells, the addition amount is only * * 6% -10% * * to achieve UL94 V-0 flame retardant level, which is 30% less than the general zinc borate addition amount;

-The mechanical performance retention rate of engineering plastics exceeds 95%, and the attenuation rate of tensile strength and impact toughness is ≤ 5%, fully meeting the structural strength requirements of high-end products;

-The smoke suppression effect is significant, and the smoke density (SDR) is reduced by more than 60% compared to traditional flame retardant systems. The release of toxic gases meets the strict requirements of GB/T 20285-2006 standard.

2. Zero halogen environmental protection

-100% halogen-free, antimony free, and heavy metal free. No toxic or corrosive gases such as hydrogen halides or cyanides are released during combustion

-Meets specialized and stringent standards such as ISO 6722 for the automotive industry, EN 45545 for rail transit, UL 1581 for the cable industry, and can be used in fields such as automotive interiors, high-speed rail flame retardant components, and high-end communication cables;

-The combustion residue is stable and harmless, recyclable and reusable, in line with the circular economy requirements of the EU WEEE directive, helping enterprises achieve green production.

3. Stable weather resistance to meet long-term service requirements

-Excellent high and low temperature resistance, able to maintain stable performance in a wide temperature range of -50 ℃~180 ℃, suitable for products in outdoor and harsh high and low temperature environments;

-Outstanding UV resistance, moisture resistance, and chemical corrosion resistance. The product has been used outdoors for more than 2 years, and its flame retardant and smoke suppression properties have not significantly decreased, nor have there been any precipitation or migration phenomena;

-The product has stable chemical properties and a shelf life of up to 5 years in a room temperature and dry environment. Storage and transportation do not require special moisture-proof or oxidation prevention measures, reducing supply chain management costs.

Application scenarios

1. The cornerstone of the "green transformation" of PVC and halogenated systems

The preferred benchmark synergist to replace antimony trioxide (Sb₂O₃).

·Data benchmark: Adding 8-12 phr ZB-2335 to soft PVC cable material can reduce smoke density (Ds max) by 50-70% while replacing 50-70% antimony dosage, and significantly improve melt strength and anti drip properties. This is the basic reference data for evaluating any new environmentally friendly alternative solutions.

2. Efficiency amplifier for halogen-free filling system

Performance and Cost Optimization Benchmark of Aluminum Hydroxide (ATH)/Magnesium Hydroxide (MDH) System.

·Data benchmark: Adding 3-6 phr ZB-2335 (10-15% of ATH) to EVA halogen-free cable material can reduce ATH usage by 5-15% while maintaining the same UL94 V-0 level. At the same time, the oxygen index of the system can be increased by 2-3 units, and the processing flowability can be improved by about 20%. Any claimed superior synergist should be compared and validated against this benchmark.

3. A "multifunctional balancer" for rubber, paint, and general plastics

A multifunctional benchmark additive that provides flame retardancy, smoke suppression, carbonization promotion, and slight reinforcement functions.

·Value: Its wide applicability and publicly available massive application data make it the lowest risk initial choice when developing new formulas.

Frequently Asked Questions

Q1: What is the core difference between ZB-2335 zinc borate and general-purpose modified zinc borate?

A1: General modified zinc borate adopts single crystal form and single functional group modification, with limited adaptability and synergistic efficiency; ZB-2335 is a directionally cultivated sheet-like single crystal, combined with bifunctional silane modification, which has higher synergistic efficiency, wider substrate adaptation range, and can accurately match the performance requirements of high-end materials.

Q2: Why do we still insist on using the classic ZB-2335 in today's world with numerous upgraded products?

A2: This is about "certainty" and "necessity". Upgraded products are typically optimized for specific pain points such as ultra-high heat resistance and ultra-fine dispersion, but may also introduce new variables such as cost and process adaptability.

Q3: Does the product comply with the latest environmental and safety regulations?

A3: Absolutely in line. The pure formula of zinc borate ZB-2335 does not contain any restricted substances such as halogens, bromine, antimony, etc., and the heavy metal content is much lower than the global regulatory limits such as RoHS and REACH. One of its components (boron) needs to be labeled in some classifications, but we provide comprehensive safety data sheets (SDS) and compliance documents to ensure your smooth passage in the global market.

If you are looking for ZB-2335 zinc borate, customized zinc borate, aerospace flame retardant additives, 2ZnO·3B₂O₃·3.5H₂O, standard 2335 zinc borate, Taixing will be your best partner and we will offer the most favorable cooperation price!