ZB 1-Hydrate

Zinc borate ZB1-hydrate is a high-end monohydrate zinc borate flame retardant produced by Taixing, which is different from the pain points of low decomposition temperature and poor processing adaptability of traditional monohydrate zinc borate. This product is precisely regulated to approximate a monohydrate structure, but its core value far exceeds' low water content '. We have achieved "programmed release" of water molecules through structural confinement and energy trap design. Realize three major breakthroughs: high thermal stability, high synergistic efficiency, and high substrate compatibility.

Core strengths

1. Multi level energy potential well and "stepped" dehydration kinetics

We have constructed water storage "sites" with different binding energies in the crystal.

·Weak binding site: A small amount of water molecules are released at relatively low temperatures (~320 ° C) to selectively inhibit the first batch of combustible volatiles produced during the initial decomposition stage of the polymer.

·Main binding site: Most water molecules are concentrated and rapidly released in the critical temperature range of 380-420 ° C. This temperature window has been carefully selected to perfectly match the peak stage of heat release rate (HRR) during the combustion of most engineering plastics. Injecting powerful heat absorption and gas-phase dilution effects at this moment can most effectively 'cut off' the combustion peak.

·Effect: This stepped release reshapes the traditional relatively broad and gentle dehydration peak into a "targeted thermal management pulse" that highly matches the waveform of the fire attack, increasing the flame retardant and smoke suppression efficiency per unit mass of water by more than 40%.

2. In situ chemical "activation center" generation driven by dehydration

The dehydration process is not only a physical change, but also a chemical activation switch.

·Surface reconstruction: The detachment of each water molecule leaves a highly active "Lewis acid site" with specific coordination unsaturation on the surface of zinc borate particles.

·Precision catalysis: The number and timing of these in-situ generated activation centers are synchronized with the polymer decomposition process, and can efficiently catalyze the dehydrogenation, crosslinking, and aromatization reactions of polymer molecular chains, promoting the formation of high-quality and highly graphitized carbon layers. This achieves a seamless transition and doubled efficiency from "physical heat absorption" to "chemical carbonization".

3. Expansion of the "chemical work" of water molecules

The released water vapor is not only a physical diluent. In ZB1- hydrate In the system, it is assigned additional chemical tasks:

·Gas solid phase reaction: Promotes the water gas reaction (C+H ₂ O → CO+H ₂) between carbon and water vapor in the carbon layer at high temperatures, converting the solid smoke precursor into combustible gas and further burning it in the flame zone, thereby reducing the generation of solid smoke (soot) at the source.

·Free radical modification: Water molecules and their decomposition products participate in gas-phase free radical reactions to regulate the combustion atmosphere.

Application scenarios

Scenario 1: High temperature resistant halogen-free wire and cable (125 ° C-150 ° C grade)

·Challenge: The material needs to maintain excellent flame retardancy even after long-term high-temperature operation (according to IEC 60332-3 CAT A). Traditional additives may deactivate or decompose prematurely during long-term thermal aging.

·Solution: The dehydration peak of ZB1- hydrate is at 400 ° C, much higher than the long-term use temperature, ensuring absolute stability during the aging process. When a cable short circuit catches fire, its programmed release mechanism can most effectively suppress sudden thermal release and protect insulation integrity.

Scenario 2: Miniature electronic connectors (PA6T, PA9T, LCP)

·Challenge: The wall thickness is extremely thin (<0.5mm), and the material is processed at injection molding temperatures of up to 340 ° C. The gasification or decomposition of any additives can cause silver streaks, underfitting, or a decrease in strength.

·Solution: The first stage dehydration temperature (320 ° C) is higher than the injection molding temperature to ensure zero interference during processing. Ensure the melting and continuous dripping of thin-walled components during combustion testing.

Frequently Asked Questions

Q1: What is the difference between zinc borate ZB1 hydrate and ordinary monohydrate zinc borate?

A1: Ordinary monohydrate zinc borate is mostly crystallized under normal pressure, with low crystal purity and wide particle size distribution; ZB1 hydrate is synthesized by hydrothermal single crystal method and modified with silane, which has higher purity, stronger thermal stability, and better compatibility with the substrate, and is suitable for the demanding requirements of high-end materials.

Q2: How do you implement and ensure this' programmatic release '? What is the physical and chemical basis of it?

A2: This is based on our in-depth application of crystal field theory and solid-state ion chemistry. By controlling the hydrothermal parameters during the synthesis process, we guide the crystal growth to form phases with specific defect structures and cation coordination environments. These slight structural differences directly determine the strength and type distribution of hydrogen bonds between water molecules and the [ZnO ₓ B ᵧ] skeleton, thereby setting the escape energy barriers (i.e. dehydration activation energy) for different water molecules.

Q3: Will this design be damaged due to moisture absorption during storage or processing?

A3: No. Programmed release is based on the intrinsic structure of the crystal phase, rather than surface adsorption. ZB1- hydrate has undergone special surface terminal treatment, resulting in extremely low surface energy and much better moisture resistance than ordinary products. Even if it adsorbs trace amounts of environmental moisture (which can be removed during the processing and drying process), it does not affect its core function of releasing internal crystalline water according to the preset program. Its release profile is intrinsic and robust.

Q4: Is the small amount of water retained by ZB1- hydrate a disadvantage compared to completely anhydrous zinc borate?

A4: On the contrary, this is its strategic advantage. Completely anhydrous products lose the efficient and clean gas-phase flame retardant and smoke suppression medium of "water". The carefully preserved and programmed controlled portion of water in ZB1- hydrate is the 'efficient special forces' deployed during the most critical stages of the fire. The volume expansion, heat absorption, and subsequent chemical reactions caused by its instantaneous gasification at high temperatures cannot be provided by anhydrous products. We have demonstrated through calculations and experiments that the marginal flame retardant benefits of this small amount of water far outweigh the processing stability challenge it poses (which we have addressed through high-temperature dehydration starting point).

Q5: For applications that pursue ultimate electrical performance (such as high frequency and low loss), will moisture cause an increase in dielectric constant?

A5: This is a key consideration. The water in ZB1- hydrate is a strongly chemically bonded crystalline water, and its dipole moment is highly oriented and bound in the crystal field, with a much lower response ability to external electric fields than free water. In composite materials, its contribution to intrinsic dipole relaxation is minimal. Actual tests have shown that at a reasonable addition amount (<5%), its effect on the dielectric constant and loss factor of polymer matrix at high frequencies (such as 1-10 GHz) is on the same level as high-performance inorganic ceramic fillers, and far superior to many organic phosphorus flame retardants. We can provide detailed dielectric spectroscopy test data for your evaluation.

If you are looking for zinc borate ZB1 hydrate, monohydrate zinc borate, programmed release flame retardant, high heat stable zinc borate, silane modified zinc borate, food contact grade zinc borate, Taixing will be your best choice and we will offer the most favorable cooperation price!