Yolatech's m-Xylylenediamine (MXDA, CAS No.: 1477-55-0), also known as 1,3-benzenedimethanamine, is an epoxy resin curing agent belonging to the class of aliphatic amines containing a benzene ring. It has the molecular formula C8H12N2 and appears as a colorless liquid at room temperature.   As an epoxy resin curing agent, it combines the characteristics of both aliphatic and aromatic amines. It features low viscosity and can cure at room temperature. The benzene ring in its molecular structure endows the cured product with superior heat resistance, water resistance, acid and alkali resistance, and chemical resistance compared to ethylene amines. Consequently, it is widely used in casting, bonding, and anti-corrosion coatings. It also serves as a raw material for producing photosensitive plastics, rubber auxiliaries, polyurethane resins, and coatings, as well as an intermediate in organic synthesis.   1. m-Xylylenediamine and its Derivatives  （1）MXDA → Hydrogenation → 1,3-BAC Features: Low viscosity Low freezing point Good gloss （2）MXDA + ECH → G-328 Features: Good chemical resistance Good adhesion Good low-temperature properties Low CO₂ absorption （3）MXDA → Deamination → PMDA Features: Good electrical properties Low toxicity High and low temperature resistance （4）Modified G-328 Produced by reacting with condensed glycerol ester mixtures Features: Good metal adhesion （5）MXDA + Styrene → Gaskamine 240 Features: Long operating time (long pot life) Stable color Low CO₂ absorption     2. Synthesis of m-Xylylenediamine (Yolatech MXDA) (1) Preparation of Isophthalonitrile Isophthalonitrile is prepared by the ammoxidation of m-xylene with ammonia and air in a fluidized bed catalytic reactor. The catalyst used is V2O5-Cr2O3-SiO2, and the reactor bed temperature is maintained at 400–415℃. The generated isophthalonitrile is collected via thin-walled condensation, then washed with water, dehydrated by centrifugation, and dried to obtain the final product. The consumption per ton of isophthalonitrile is 1200 kg of m-xylene (90%), 1200 kg of liquid ammonia (99%), and 3 kg of catalyst.   (2) Preparation of m-Xylylenediamine Isophthalonitrile, alcohol, and potassium hydroxide are mixed and dissolved, then added to a high-pressure autoclave, followed by the addition of a Raney nickel catalyst paste. The relevant valves are closed, and the air inside the autoclave is evacuated. The vessel is purged with nitrogen several times until all air is removed. After evacuating the nitrogen, hydrogen is pressurized into the autoclave. Under stirring, the temperature is raised to about 90℃, and the hydrogen pressure is regulated and maintained at 4.5 MPa. Under these reaction conditions, hydrogen is continuously supplied until absorption ceases. The mixture is then cooled, excess pressure is released, and the material is discharged and filtered to recover the catalyst. The filtrate is sent to a fractional distillation unit. The alcohol is first distilled off at atmospheric pressure, followed by vacuum distillation. The fraction collected at 143–147℃ under 1.867 kPa is the finished product.     3. Application Fields of Yolatech MXDA (1) Epoxy Resin Curing Agent: Accounts for 75% of total consumption, used in anti-corrosion coatings, adhesives, and other fields due to its excellent room-temperature curing performance and low toxicity. (2) Nylon MXD6: Used as a polymerization monomer to prepare high-performance engineering plastics. It is applied in automotive lightweighting (e.g., Tesla engine components), robot joints, food packaging, and other fields. The global MXD6 market size is expected to exceed $1 billion by 2025. (3) Pharmaceutical Intermediate: Used in the synthesis of anti-tumor drugs and antibacterial agents, accounting for about 10% of the market.    

m-Xylylenediamine (MXDA) is a class of aliphatic amine compound containing an aromatic ring. It is produced from m-xylene through ammoniation oxidation and hydrogenation. As a fundamental amine product, MXDA is widely used in epoxy resin curing agents. Its characteristics as an epoxy curing agent are as follows: the aliphatic primary amine group in its molecular structure allows it to be used as a room-temperature curing agent. Meanwhile, the benzene ring in the structure gives the cured product better heat resistance than aliphatic polyamines, along with excellent chemical resistance, while its irritation and toxicity are lower than those of ethylene amines. Typical Physical and Chemical Data of MXDA (For Reference Only): Property Item Specification / Value Model MXDA Product Name m-Xylylenediamine Appearance Colorless transparent liquid Color (Gardner) 1.0 Max. Density 1.048 ~ 1.056 Viscosity (cps/20℃) 6.8 Freezing Point (℃) 14.1 Active Hydrogen Equivalent 34 The dosage of MXDA for Bisphenol A epoxy resin YLE-128 (epoxy equivalent 185) is approximately 16%-18%. The pot life is about 50 minutes at room temperature for 100g of epoxy resin YLE-128, and complete curing at room temperature takes about 7 days. Performance Characteristics of MXDA as an Epoxy Curing Agent: ✓ Colorless and transparent appearance, imposing no color burden on the cured product; ✓ Low viscosity, making it convenient to handle; ✓ Low active hydrogen equivalent, requiring a small addition amount; ✓ Excellent chemical resistance, showing great resistance to toluene and 10%wt sulfuric acid; ✓ Good thermal stability; ✓ Good water resistance; ✓ Good salt spray resistance. Application Examples of yolatech MXDA: Battery Sealing and Terminal Adhesives MXDA can be used in battery sealing compounds and terminal adhesives (also known as red and black glue or marking glue), which are used for sealing and marking the positive and negative terminals of batteries. Since the adhesive layer is in direct contact with acid gas and liquid while often being subjected to external impact, the adhesive is required to have low viscosity, high fluidity, and excellent penetration. After curing, it must possess superior bonding strength, good sealing, excellent acid and alkali resistance, high hardness, and Excellent resistance to humid heat aging.. As a low-viscosity liquid that cures at room temperature, MXDA yields cured products with excellent heat and chemical resistance, perfectly meeting the performance requirements for battery sealing and terminal adhesives. Anti-corrosion Coatings With its excellent resistance to acid, toluene, and salt spray, MXDA can be combined with epoxy resin for anti-corrosion coatings in bridge repair, pipeline coatings, ships, containers, and flooring. It performs particularly well in bonding adhesion in humid environments. Waterborne Epoxy Curing Agents Modified into waterborne epoxy curing agents, MXDA can shorten the surface drying time of epoxy films and provide better gloss and hardness without affecting the impact resistance and flexibility of the coating. It is especially suitable for the preparation of waterborne anti-corrosion coatings. Construction Repairs MXDA can be modified to prepare epoxy curing agents widely used for repairs in humid environments such as bridge construction. Other Applications MXDA is also used in polyamide wax powder, nylon, pesticides, rubber, isocyanates, carbon fiber composites, and other fields.