Ultra Fine Active Magnesium Hydroxide

The ultrafine active magnesium hydroxide produced by Taixing is widely suitable for high-precision application scenarios such as new energy battery separators, electronic packaging adhesives, high-end elastomers, and special coatings. It fully solves the problems of insufficient filling force, dispersion and aggregation, and flame retardant efficiency of polymer materials, and helps achieve a qualitative leap in the performance of high-end materials.

Core strengths

1. Physical activity

·Ultimate specific surface area: A specific surface area of 15-40 m ²/g provides a huge physical contact interface, which exponentially improves the efficiency of heat conduction, stress transfer, and chemical reactions.

·Nanoscale effect: The particle size is smaller than the entanglement radius of the polymer chain, allowing it to penetrate and affect the free volume and local segment motion of the polymer, thereby modifying the thermodynamic and rheological properties of the body.

·Morphological catalysis: The highly regular hexagonal crystal structure can serve as a heterogeneous nucleating agent, guiding semi crystalline polymers (such as PP, PA) to form finer and more complete crystal structures, thereby enhancing the modulus, thermal deformation temperature, and dimensional stability of the material.

2. Chemical activity

·High density surface hydroxyl groups: exposed crystal faces rich in highly reactive Mg OH groups through crystallization control. These hydroxyl groups are no longer passive endpoints, but can serve as starting points for condensation, esterification, and grafting reactions with polymer end groups (such as - COOH, - NCO, - NH ₂) or crosslinking agents.

3. Collaborative flame retardant mechanism

-High temperature stable heat absorption: The initial decomposition temperature is 348 ℃ (peak decomposition temperature is 445 ℃), far exceeding the traditional magnesium hydroxide's 330 ℃. It is perfectly suitable for high-temperature processing engineering plastics such as PP, PA, PI, and battery separator coating processes. The heat absorption per unit mass reaches 1390J/g, which can quickly block the combustion chain reaction and provide an ultra long safety window for high-temperature sensitive scenarios such as new energy battery packs and precision electronic devices;

-Low smoke, non-toxic and environmentally friendly: During combustion, only clean water vapor is released, and no toxic gases such as hydrogen halides, dioxins or corrosive substances are released. The smoke density ratio (SDR) is ≤ 115, and the smoke toxicity reaches GB/T 20284-2006 ZA1 level (the highest safety level), without the need for additional smoke suppressants. A single raw material achieves the triple effect of "flame retardant+smoke suppressant+non-toxic", suitable for enclosed spaces and high-end places with dense personnel;

-Dense carbon layer protection: Supercritical hydrothermal synthesis technology shapes a regular hexagonal plate-like crystal structure (diameter to thickness ratio of 12:1), and the density of the decomposed magnesium oxide ceramic layer is increased by 65%. It can maintain structural integrity for ≥ 160 minutes in a flame environment at 1000 ℃, effectively blocking the transfer of heat, oxygen, and combustible gases while suppressing droplet phenomena;

-Free radical capture: High energy radiation activation treatment generates a large number of active hydroxyl groups on the surface of the powder, which can efficiently capture active free radicals such as · OH and · H generated during combustion, suppress gas-phase combustion reactions, achieve "gas-phase condensed phase" dual phase synergistic flame retardancy, and significantly reduce the peak thermal release rate of the material.

Application field

1. In the field of new energy batteries

-Battery separator coating: a ceramic coating used for lithium batteries and energy storage battery separators, with ultra-high activity and dispersibility to form a uniform and dense protective layer. The structure remains intact at high temperatures above 200 ℃, effectively blocking lithium dendrite penetration, reducing the risk of short circuit and fire, and improving the thermal stability and mechanical strength of the separator, helping to increase battery cycle life by more than 20%;

-Battery pack packaging material: used for PPE/PA alloy battery pack shell and fireproof partition. Adding 45% can achieve UL94 V0 level flame retardancy, GWIT reaches 880 ℃, and the shell integrity retention time is extended to 25 minutes during thermal runaway testing, effectively blocking flame spread and meeting the GB 38031-2020 power battery safety standard;

-Electrolyte additive: As an efficient purification agent for electrolytes, it can quickly adsorb impurities such as hydrofluoric acid and metal ions, suppress electrolyte hydrolysis and thermal runaway, improve the first coulombic efficiency of batteries, and is suitable for high-energy density positive electrode materials such as NCM811 and lithium manganese iron phosphate.

2. Electronic packaging and adhesive field

-Semiconductor packaging materials: epoxy plastic packaging materials used for integrated circuits and chip packaging, with ultra-high purity and dispersibility to ensure the dielectric and thermal conductivity of the packaging materials. The dielectric constant is ≤ 3.0, the thermal conductivity is increased by 15%, and it meets the UL94 V0 flame retardant level, meeting the strict requirements of high reliability and low pollution of semiconductor devices;

-High end adhesive: used for epoxy and polyurethane adhesives in aerospace, electronic and electrical applications. Adding 25% -30% can achieve efficient flame retardancy without affecting the bonding strength and flexibility of the adhesive. The shear strength remains above 28MPa, and there is no delamination phenomenon after high and low temperature cycling tests;

-5G communication devices: modified materials used for 5G base station filters and antenna covers, with low dielectric loss and high flame retardancy, no signal interference in high-frequency signal transmission, and meeting the weather resistance requirements of harsh outdoor environments. The service life is ≥ 20 years.

3. High end elastomers and rubber fields

-High end elastomer products: used for TPE, TPU, EPDM and other elastomers to produce new energy vehicle seals, medical catheters, high-end yoga mats. Adding 30% can achieve UL94 V0 level flame retardancy, with a fracture elongation rate of over 600% and a tensile rebound rate of 98%. The flexibility is no different from pure elastomers;

-Engineering plastic modification: used for engineering plastics such as PP, PA, PBT, etc., to produce lightweight automotive parts and precision machinery shells. Adding 40% can achieve efficient flame retardancy, with a mechanical property retention rate of ≥ 95%. It is suitable for high temperature processing technology of 250-320 ℃ and has no premature decomposition failure problem;

-Special rubber products: used for special rubbers such as fluororubber and silicone rubber to produce aerospace seals and high-temperature resistant cable sheaths. They have flame retardant, oil resistant, and high and low temperature resistant properties, and have stable performance in environments ranging from -60 ℃ to 200 ℃. They have passed the aerospace material certification standards.

4. High end coatings and construction industry

-Special flame retardant coating: used as a fireproof coating for high-rise buildings and military facilities. Adding 35% can make the coating fire-resistant for ≥ 3 hours, forming a dense expanded carbon layer with low smoke density and no toxic gas release. It complies with the national standard GB 14907-2022 "Steel Structure Fireproof Coating";

-High end thermal insulation materials: used for high-end thermal insulation materials such as air gel and vacuum insulation board. Ultra high activity can improve the structural stability and flame retardant performance of thermal insulation materials. The flame retardant grade reaches Grade A, and the thermal conductivity is ≤ 0.020W/(m · K), which is suitable for the thermal insulation and fire prevention requirements of high-end commercial buildings and cold chain logistics;

-Environmental Protection Management Materials: Used for deep treatment of industrial wastewater, with ultra-high specific surface area and activity, it can efficiently adsorb heavy metal ions, dye molecules and other pollutants. The adsorption efficiency for lead, cadmium, mercury is ≥ 99.5%, and the treated wastewater meets the national first-class discharge standard.

Frequently Asked Questions (FAQ)

Q1: What is the core difference between ultrafine active magnesium hydroxide and ordinary ultrafine magnesium hydroxide?

A1: The core differences are reflected in activity, dispersibility, and comprehensive performance: ① Activity: This product has been activated by high-energy radiation and polymer coating, with an activity index of ≥ 99.5%, while the activity index of ordinary ultrafine magnesium hydroxide is only 85% -90%; ② Dispersion: The dispersion uniformity of this product is ≥ 99%, with no agglomeration phenomenon. Ordinary products are prone to agglomeration, resulting in uneven substrate performance; ③ Comprehensive performance: This product has the triple value of flame retardancy, reinforcement, and processing adaptability. High filling of ordinary products can easily lead to substrate brittleness and significantly reduce processing efficiency.

If you are looking for ultrafine active magnesium hydroxide, high-end elastomer flame retardants, and nano active MDH, Taixing will be your best partner and we will provide the lowest price cooperation!