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.

Product Information Chemical Name：1,3-Cyclohexanedi(methylamine Alias/Abbreviation/Short Name/Old Name: 1,3-BAC, HXDA, 1,3-Bis(aminoethyl)cyclohexane Application fields: epoxy resin, polyurethane, polyamide   1,3-BAC is an important alicyclic diamine organic compound. At room temperature, it appears as a colorless, transparent, low-viscosity liquid with a distinct ammonia odor. It is corrosive, flammable when exposed to open flames, and has a pungent smell. Soluble in water, Ethanol, etherand various organic solvents.   Due to the characteristics of the product structure, 1,3-BAC having excellent yellowing resistance, low viscosity, rapid curing speed, and excellent chemical corrosion resistance, it is widely used in the formulation of epoxy resin curing agents, the synthesis of polyurethane isocyanates, and the preparation of specialty polyamides.Compared to other curing agent raw materials, this product features rapid curing speed, requires a lower addition amount, and exhibits outstanding resistance to yellowing. Its low solidification point ensures excellent curing performance even in low-temperature and humid environments.   With the decline in the cost of m-phenylenediamine raw materials and the increasing stringency of environmental regulations, 1,3-cyclohexanediamine is gradually emerging as an important alternative to traditional aromatic amines.   Physical Properties Structural formula: Molecular weight: 142.2 Chemical formula: C8H18N2 CAS NO.: 2579-20-6 EINECS NO.r:219-941-5Appearance（25℃): Colorless, transparent liquidColor (APHA): 20 Max Viscosity (mPa·s/20℃): 9.1 Density（g/cm³,25℃): 0.940~0.950 Purity (%): ≥99.0 Active Hydrogen Equivalent (g/eq): 35.5 Melting Point (℃): < -70 Boiling Point (℃): 220 Flash Point (℃): 113 Structural Features The 1,3-cyclohexanediamine molecule contains two primary amine groups, which are chemically highly reactive and can undergo reactions with acids, epoxy groups, isocyanate groups, and other functional groups. Due to the presence of the cyclohexane ring, 1,3-cyclohexanediamine exists in two isomeric forms: cis and trans. Industrial products typically consist of a mixture of these two isomers. The trans isomer is thermodynamically more stable, favoring the formation of polymers with high crystallinity and excellent thermal resistance; whereas the cis isomer promotes the formation of an amorphous structure, enhancing the material's transparency. By adjusting the cis-trans ratio during the synthesis process, it is possible to tailor the final properties of the material.   13-BAC Features: Cures quickly at room temperature; Excellent weather resistance; Low viscosity, easy to handle; Clear and transparent, with a well-defined appearance of the cured material; The cured material exhibits excellent mechanical properties.   Preparation method At present, the industrial production of 1,3-cyclohexanedimethanamine is primarily achieved through the catalytic hydrogenation of m-xylylenediamine (MXDA). This process typically uses m-phenylenediamine as the feed stock and is carried out under high temperature and pressure conditions in the presence of a solvent (such as water or alcohols) and a supported noble-metal catalyst (e.g., ruthenium, palladium, or rhodium). The benzene ring is saturated to form a cyclohexane ring through hydrogenation. During the reaction, by carefully controlling the type of catalyst, reaction temperature, pressure, and reaction time, the ratio of cis and trans isomers in the product can be adjusted. After the reaction, the crude product is separated from the catalyst and then purified by distillation to yield high-purity 1,3-cyclohexanediamine..   Application fields Epoxy resin curing agent 13-BAC is primarily used as an epoxy curing agent or for the preparation of modified epoxy curing agents. Compared to aromatic amine curing agents, it not only has lower viscosity and better handling properties but also yields cured products with outstanding resistance to ultraviolet light (anti-yellowing), as well as excellent weather resistance, temperature resistance, water resistance, and chemical resistance. Moreover, it cures rapidly and can be used for curing at either room temperature or low temperatures. It is widely applied in high-end outdoor floor coatings, stone adhesives, electronic potting compounds, composite materials (such as automotive parts and wind turbine blades), and in the fields of jewelry adhesives and crystal adhesives where appearance and color quality are of paramount importance.   Make an epoxy curing agent Mixing ratio:Epoxy resin YLE-128 (epoxy equivalent weight 190): 100Hardener 1.3-BAC dosage: 17–20 Initial formula (mass ratio) Epoxy resin YLE-128 EEW 100g 190 Hardener 1.3-BAC Active hydrogen quivalent 19g 35.6 @23 ℃, 50% curing performanceTouch-drySemi-dryCompletely dry@5℃, 80% curing performanceTouch-drySemi-dryCompletely dry 1.45h4.5h>24h13.5h>24h>24h   Note: 1. The data listed above are typical values only and do not constitute the product’s technical specifications. 2、The information provided above describes only the product’s performance and does not constitute a guarantee of such performance. Since the formulation and process conditions of end products may vary, we recommend testing the product performance and applicability described above to confirm whether they can achieve your intended results.   As an epoxy curing agent, 1,3-BAC can be used in CFRP. Compared to traditional RTM processes, the high-cycle RTM process (such as HP-RTM) requires shorter cycle times for resin injection, curing, and demolding, and does not require post-curing.   1,3-BAC having a low viscosity ensures more thorough fiber impregnation and extends the working time. Compared to other amine-based curing agents, It can significantly shorten the curing time and eliminates the need for post-curing, thereby enhancing the efficiency of the RTM process. Meanwhile, the cured product exhibits a higher glass transition temperature (Tg). This makes it suitable for mass production of large CFRP components.   Polyurethane raw materials 13-Cyclohexyl dimethylamine is a key raw material for the synthesis of alicyclic isocyanate—hexamethylene diisocyanate (H6XDI). H6XDI does not contain a benzene ring structure and boasts excellent light stability and hydrolysis resistance. It is an important raw material for preparing high-end polyurethane coatings, elastomers, and adhesives, and is particularly well-suited for applications with extremely high requirements for aging resistance, such as automotive paints and outdoor facilities..   Polyamide monomer As a hydrogenated derivative monomer of MXD6 (m-xylylene diamine-adipic acid nylon), 1,3-cyclohexanediamine can be used to synthesize novel cycloaliphatic polyamides. These materials combine the excellent barrier properties and thermal stability of aromatic nylons with the hydrolysis resistance and flexibility of cycloaliphatic materials, making them promising candidates for applications in areas such as food packaging and automotive fuel lines..   Packaging & warehousing & transportation Net weight: 190 kg per drum; packaged in iron drums. During transportation, this product must not be mixed with acids or oxidizing agents. Store in a cool, dry environment, keeping it tightly sealed and protecting it from rain, direct sunlight, and high temperatures. Keep it away from oxidizing agents and acidic substances.   Precautions 1,3-Cyclohexadiamine is a toxic chemical. Acute toxicity studies indicate that the oral LD50 in rats is approximately 880 mg/kg, and the dermal LD50 is about 100 mg/kg. This substance is highly corrosive to the skin, eyes, and respiratory tract, and contact can cause severe burns. When handling this substance, wear protective clothing, chemical-resistant gloves, goggles, and a mask to avoid direct contact with skin and eyes. In case of contact, immediately wipe off the substance. And Rinse thoroughly with plenty of water and seek medical attention..If the eyes come into contact with it, first rinse thoroughly with plenty of water, then seek medical attention immediately.   For information on the safe use of this product, please refer to the Material Safety Data Sheet (MSDS).

Epoxy resin for jewelry generally refers to highly transparent epoxy resin materials used for decorative purposes.   It is widely used in a variety of items, including personal accessories such as earrings, hair clips, necklaces, bracelets, hat badges, brooches, apparel, key rings, buttons, shoe ornaments, belt buckles, and bag charms. It is also applied in daily necessities like door and cabinet handles, hardware fittings, as well as picture frames, signage, and other decorative items.   Epoxy resins for jewelry are typically categorized into flexible resin, rigid resin, doming resin, and casting/polishing resin. The main components usually include epoxy resin, amine curing agents, and various additives. These resins are characterized by high transparency, flexibility or high hardness, and excellent yellowing resistance.   1,3-BAC (1,3-Cyclohexanedimethanamine) is an aliphatic amine and serves as a key raw material for epoxy curing agents, widely used around the world. When used as a raw material for jewelry epoxy curing agents, 1,3-BAC offers typical advantages such as low viscosity, high hardness, high transparency, yellowing resistance, and fast curing speed. This endows the epoxy jewelry resin with a more ideal appearance and outstanding performance.   Typical Physical and Chemical Data of 1,3-BAC: Product Name: 1,3-Cyclohexanedimethanamine Appearance: Colorless transparent liquid Color (APHA): 20 Max Viscosity (cps/20℃): 9.1 Density: 0.940 - 0.950 Freezing Point (℃): < -70 Active Hydrogen Equivalent: 35.6   Features: Fast curing speed at room temperature Excellent weather resistance Low viscosity and easy handling Crystal clear with excellent appearance of cured products Cured products possess excellent mechanical properties

  Today, we are excited to introduce a product touted as the "twin brother of Triethylenetetramine (TETA)" — N4-Amine.     Appearance Colorless clear liquid Purity 98% min Color (APHA) 50 max Water Content 0.5 max Amine Value mgKOH/g 1200 min Density 25°C 0.95g/cm³ Boiling Point 314.9 °C Flash Point 153.1 °C   N4-AMINE (N,N'-Bis(3-aminopropyl)ethylenediamine) is a propylene-based aliphatic amine. As a colorless, transparent liquid, it serves as an excellent substitute for ethylene polyamines. Classified as an aliphatic polyfunctional amine, N4-AMINE offers a powerful alternative beyond standard ethylene amines. With its low viscosity and rapid gelation speed, its active hydrogen characteristics make modification a breeze. It not only boasts exceptional toughness but also delivers outstanding adhesion, making its performance advantages clear and evident.   Need fast drying and high strength? → Choose N4-Amine. In daily applications, it reacts incredibly fast. When paired with YLE-128, it handles both low-temperature environments and rapid curing requirements with ease. N4-AMINE is truly an all-rounder. Looking for an efficient, powerful, and stable adhesive material? You can't go wrong choosing N4-AMINE! Moreover, N4-AMINE can replace traditional ethylene amines in modification processes. For modified polyamides, it offers faster gelation speeds and stronger paint film adhesion.   From epoxy resin curing agents to polyurethane accelerators, N4-AMINE has a wide range of applications, bringing convenience to various industries. Its packaging options are equally flexible: while the standard is a 190KG drum, we can also provide IBC totes to meet your specific needs.    

Yolatech Company DMP-30 Equivalent Grades: K54, KH-30, HI-54K, HY960.   Yolatech DMP-30 consists of 2,4,6-Tris(dimethylaminomethyl)phenol. It is a versatile curing accelerator designed to shorten the curing time of epoxy resin systems. It exhibits excellent compatibility with Polyamine and Polyamide series epoxy curing agents. It is soluble in alcohol, benzene, acetone, and cold water, and slightly soluble in hot water.   Physical Properties Chemical Name: 2,4,6-Tris(dimethylaminomethyl)phenol Synonyms: DMP-30 / K-54 / Accelerator Catalyst HI-54K Molecular Formula: C₁₅H₂₇N₃O Molecular Weight: 265.4 CAS Number: 90-72-2 EINECS Number: 202-013-9 Appearance: Transparent light yellow liquid Color: Max 6 (Gardner) Amine Value: 580-630 mgKOH/g Viscosity (25°C): 100-300 cps (Brookfield) Moisture Content: Max 0.5% Refractive Index (20°C): 1.5150-1.5200 Specific Gravity (25°C): 0.97-0.99 Flash Point: 150°C     Applications DMP-30 serves as a curing accelerator in solvent-based or solvent-free epoxy systems, including: Polyamine series curing systems. Polyamide and Amidoamine series epoxy curing systems. Mercaptan (Thiol) series epoxy curing systems. Carboxylic Acid Anhydride or Polysulfide series epoxy curing systems. It is widely used in coatings, adhesives, and flooring industries. It acts as a catalyst for epoxy automotive body adhesives, epoxy-anhydride systems, and as a solid catalyst for isocyanates and polyols.     Mechanism of Action The reaction between epoxy resin (containing epoxy groups) and amine curing agents (such as aliphatic amines and polyamides) is a nucleophilic ring-opening reaction: the amine group (-NH₂) attacks the ring of the epoxy group, opening the ring to form hydroxyl groups (-OH), which then undergo further crosslinking.However, this reaction is slow at room temperature (especially in low-temperature environments). DMP-30's phenolic hydroxyl group activates the epoxy group via hydrogen bonding, while the dimethylamino group (-N(CH₃)₂) acts as a nucleophile to promote the combination of the amine and epoxy groups. This significantly lowers the activation energy, shortening the curing time by 30%-50% (e.g., at 25°C, curing takes 24 hours without accelerator, but only 8-12 hours with DMP-30).   Recommended Dosage 1. As Epoxy Curing Agent: When used alone, the dosage for YLE-128 epoxy resin (Epoxy Equivalent Weight 185-195) is approximately 10%. It enables rapid curing at room temperature or low temperatures for coatings, castings, and sealants. For YLE-220 epoxy resin, the dosage is approximately 12.5%. For Epoxy-Liquid Polysulfide systems, the dosage is 10-15% for room temperature curing and 6% for heat curing. It imparts unique bonding, casting, and sealing properties. Typical range: 5-15 PHR. 2. As Epoxy Accelerator: When mixed with other epoxy curing agents, it acts as an accelerator to increase curing rates. Dosage is 0.1%-3% PHR of the main curing agent. Widely used in anti-corrosion coatings, cast floor concrete protection, and adhesives. 3. As Polyurethane Catalyst: It is a catalyst for isocyanate trimerization. It has higher catalytic selectivity for Polyisocyanurate (PIR) reactions compared to PUR, making it suitable for PIR formulations. DMP-30 is a milder activity catalyst; it requires a larger dosage in formulations, resulting in a gentle reaction, stable rise, good flowability, and end products with PIR high-temperature and flame-retardant effects.     Advantages Highly efficient acceleration (strong low-temperature applicability). Improves coating film hardness and chemical resistance. Good compatibility with most epoxy resins and curing agents (no phase separation).     Limitations May experience slight yellowing upon long-term UV exposure (due to phenolic hydroxyl oxidation), making it unsuitable for outdoor high-gloss flooring. Irritating to skin; potential for trace formaldehyde release. Protective equipment must be worn during application.     Storage & Handling Avoid excessive heat and humidity. Store in unopened original containers at room temperature, away from fire sources, strong acids, strong bases, and strong oxidizing agents. Shelf life is 12 months from the date of production. Precautions: Please refer to the Yolatech Product DMP-30 Material Safety Data Sheet (MSDS). Packaging: 200Kg drum, 1000 IBC.  

Nonylphenol has long been used in epoxy resin systems as a functional aid to promote dilution. However, in recent years, with increasing health awareness and stricter environmental regulations, the use of nonylphenol has become increasingly restricted. Nanjing Youlai's Styrenated Phenol MSP-250 serves as an epoxy resin modifier. In addition to its ideal chemical properties, it meets the demands of environmental regulations.   Typical Data Product Name: Styrenated Phenol Grade: MSP-250 Appearance: Liquid Color (APHA): <200 Viscosity (cps/25°C): 300~800 Hydroxyl Value (mg KOH/g): 230~260   Performance Features As an epoxy resin modifier, MSP-250 is a clear, low-viscosity liquid. When added to the curing agent component, it accelerates the curing speed and improves the water resistance, anti-whitening properties, scratch resistance, abrasion resistance, hardness, and leveling performance of the cured product. MSP-250 exhibits color stability under both long-term and high-temperature conditions. Comparison of color performance between MSP-250 and Nonylphenol when mixed with curing agents:   Within 1 week at room temperature: No significant difference observed. Within 3 days at 60°C: MSP-250 demonstrates superior color stability compared to Nonylphenol. Within 1 week at 60°C: MSP-250 demonstrates superior color stability compared to Nonylphenol.   Application Area Epoxy Coatings & Heavy-duty Anti-corrosion Coatings: Acts as a plasticizer, diluent, and accelerator. Craft & Jewelry Adhesives: Offers excellent transparency, abrasion resistance, and adhesion. Electronics & Electrical: Suitable for potting, varnishes, industrial adhesives, and LED encapsulation. Automotive Sealants: Improves bonding for doors and headliners, providing waterproofing and rust prevention for internal and external panels. Civil Engineering & Construction: Applicable for crack sealing, crack injection, carbon fiber reinforcement, and steel reinforcement.

Product Description YLSE-0500 / YLSE-0510 is a high-temperature-resistant trifunctional epoxy resin based on p-aminophenol. The molecular structure contains multiple epoxy groups and aromatic rings, enabling the cured system to form a high crosslink density and aromatic density during curing. As a result, the cured material exhibits excellent heat resistance, high mechanical strength, low curing shrinkage, and good resistance to radiation, water, and chemicals. In addition, its low viscosity makes it easy to process and suitable for solvent-free operations. It is used in electrical insulation castings requiring high thermal resistance, as well as composite manufacturing processes such as carbon fiber and glass fiber filament winding, pultrusion, lamination, and prepreg production. The glass transition temperature (Tg) can exceed 200 °C.   Product Name 4-(2,3-Epoxypropoxy)-N,N-di(2,3-epoxypropyl)aniline CAS No.: 5026-74-4   Structural Formula   Technical Specifications   YLSE-0500 YLSE-0510 Appearance Brown liquid Yellow liquid EEW, g/eq 100-115 93-106 Viscosity, cps@25°C 1500-6000 500-1000 Volatiles, % Max. 1.5 Max.1.0   Main Applications High-temperature structural adhesives Carbon fiber and glass fiber composites for pultrusion and filament winding Electrical insulation materials High-temperature epoxy casting systems used in vacuum casting (RTM, VARTM) and Automatic Pressure Gelation (APG) Potting and sealing of miniature motor components High-temperature epoxy diluent   Properties of Neat Resin Castings Comparison of Casting Performance between YLSE-0500 and YLSE-0510 Using DDS (4,4'-diaminodiphenyl sulfone) as the curing agent, selected performance properties of castings made from YLSE-0500 and YLSE-0510 epoxy resins were tested. Casting preparation procedure: • Heat DDS to 200 °C (melting point 176 °C) until melted. • Preheat the epoxy resin to 100 °C. • Slowly add DDS into the epoxy resin while stirring until uniform. • Defoam under vacuum for 15 minutes. • Pour into molds and heat-cure.   The performance indicators of the resulting castings are shown in the table below: Brand type YLSE-0500 YLSE-0510 Curing agent name DDS Curing agent addition amount phr 49 Curing condition 0.5h/80°C+1h/100°C+1.5h/120°C+2h/180°C Tg(DMA method) °C 245-250 260-270 Bending performance at 25°C Strength Mpa 132 136 Modulus  Gpa 3.5 3.4 Tensile properties at 25°C Strength Mpa 64 70 Modulus  Gpa 3.8 3.6 Elongation at break  % 2.3 2.8   Casting Properties of YLSE-0500 with Methyl Tetrahydrophthalic Anhydride (MTHPA) YLSE-0500 epoxy resin is commonly used together with aromatic amine curing agents (such as diaminodiphenyl sulfone and diaminodiphenylmethane) and anhydride curing agents (such as methyl nadic anhydride, methyl tetrahydrophthalic anhydride, and methyl hexahydrophthalic anhydride).   The casting properties of YLSE-0500 cured with methyl tetrahydrophthalic anhydride (MTHPA) at 25 °C are shown in the table below: Tensile strength Mpa Bending strength Mpa Impact strength Kj/m2 Elongation at break  % Tg(DSC)  %  20-30 90-100 8-10 1.5-2.5 190-200 Mixing ratio(Phr): YLSE-0500/MTHPA=100/150 Curing conditions: 80℃/2h+100℃/2h+130℃/2h+180℃/3h   Precautions Due to its high functionality and high epoxy value, the curing process generates a large amount of heat, so attention must be paid to preventing runaway polymerization. If the viscosity becomes too high and causes difficulty in use, the resin may be heated to 100–120 °C for 1 hour to reduce the viscosity. During heating, please open the container lid to prevent any risk of runaway polymerization.   Equivalent Grades Similar domestic and international product grades include MY-0500, MY-0510, AFG-90, AFG-90H, etc.

Why is YLSE-721 our star product? What makes it so “hardcore”?   YLSE-721 is a high-performance, amino-based tetrafunctional liquid epoxy resin — an “industrial-grade bonding master” designed specifically for high-strength and high heat-resistant applications. Its name reveals the secret: “tetrafunctional” means each molecule contains four reactive sites, like a “multi-armed warrior” that can form a denser and stronger cross-linked network with curing agents. This is the key reason why its strength far exceeds that of ordinary difunctional epoxy resins. Meanwhile, its liquid form provides excellent flowability, making it ideal for potting, coating, or filling complex structures, ensuring easy and efficient application. What truly impresses users are its “three highs”: high temperature resistance, fast curing, and superior mechanical strength. Heat resistance: Continuous service temperature up to 150°C, and short-term endurance above 180°C, far outperforming standard epoxies (typically ≤120°C). Perfect for engine surroundings, motor coils, and PCB protection under high-temperature conditions. 🔧 Curing speed: Fully cures within 30–60 minutes at 60–80°C, which is 2–3 times faster than conventional epoxy systems — a real time-saver for urgent projects. Mechanical properties: Tensile strength exceeds 50 MPa, flexural strength surpasses 80 MPa, with excellent impact resistance and dimensional stability. It resists cracking even under severe vibration or thermal cycling. In addition, YLSE-721 offers outstanding electrical insulation, oil resistance, water resistance, and chemical durability — truly earning its reputation as the “Iron Man of the industrial world.”   Product Information Chemical Name: N,N,N',N'-Tetraglycidyl-4,4'-diaminodiphenylmethane CAS No.: 28768-32-3 Structural Formula     Main Applications High-temperature resistant composites such as carbon fiber and glass fiber; Potting of electronic components (e.g. power modules, LED drivers); Impregnation and insulation protection for motors and transformer coils; Precision mold manufacturing, including bonding of metals, ceramics, and composites; Bonding and sealing of aerospace structural components; Wear-resistant repair and anti-corrosion coatings for heavy-duty mechanical parts.   Usage Instructions YLSE-721 can be formulated with amine-type, anhydride-type, or imidazole-type curing agents and coupling agents to prepare adhesives, casting compounds, or composite systems for applications requiring excellent heat resistance. Common curing agents include 4,4'-diaminodiphenyl sulfone (4,4'-DDS), 4,4'-diaminodiphenylmethane (DDM), methyl tetrahydrophthalic anhydride (METHPA), methyl nadic anhydride (MNA), and 2-ethyl-4-methylimidazole (2,4EMI). If the resin appears too viscous during use, it can be heated to an appropriate temperature to reduce viscosity before mixing. To improve toughness, additives such as liquid polysulfide rubber or liquid nitrile rubber can be incorporated.   Typical Cured Properties DDS DDM METHPA MNA Test Method Glass Transition Temperature (°C) 250-260 220-230 200-210 235-240 Tensile Strength (MPa) 75 50 50 45 Tensile Modulus (GPa) 3.5 3.3 3.2 3.6 Flexural Strength (MPa) 130 120 100 97 Flexural Modulus (GPa) 3.3 3.4 4.0 3.8 Elongation at Break (%) 2.8 1.6 1.9 1.1 Impact Strength (kJ/m²) 15 10 9 8 Resin-to-Hardener Ratio (by weight) 100:52 100:42 100:42 100:150 Curing Schedule 100℃*2h+130℃*2h+160℃*2h+180℃*2h+200℃*2h   Common Mistakes to Avoid ❌ Incorrect curing agent combination: YLSE-721 must be used with specific anhydride or aromatic amine curing agents. Using general-purpose epoxy hardeners may result in incomplete curing, soft texture, or drastically reduced heat resistance ⚠️. ❌ Neglecting surface preparation: The substrate must be thoroughly cleaned, dried, and sanded; otherwise, adhesion failure or “false bonding” may occur. ❌ Overheating during curing: Although the resin has high thermal resistance, curing should be kept within the recommended temperature range (usually 60–120°C). Excessive temperature may cause bubbling or discoloration.   Precautions Due to its high functionality and epoxy value, YLSE-721 releases a large amount of heat during curing, so precautions should be taken to prevent runaway polymerization. If the viscosity is too high for convenient use, preheat the resin to 100–120°C for about one hour to lower viscosity. ⚠️ When heating, keep the container lid open to prevent polymerization explosion. This epoxy resin is alkali-resistant but not resistant to strong acids.

YLEP-638 Structural Characteristics The molecular backbone of YLEP-638 is a phenolic novolac structure formed by the condensation of phenol and formaldehyde, providing a rigid aromatic framework. This backbone itself has very high thermal stability and rigidity. On this phenolic framework, the hydroxyl groups react with epichlorohydrin to introduce multiple epoxy groups, making it a typical multifunctional epoxy resin. Unlike standard bisphenol-A type epoxy resins (such as E-51, functionality ≈ 2), YLEP-638 usually has an average epoxy functionality of 3.5 to 4.0 or even higher. Performance Features of YLEP-638 Outstanding Heat Resistance Origin: High crosslink density (resulting from high functionality) and rigid aromatic backbone. Performance: The cured product exhibits extremely high glass transition temperature (Tg) and heat distortion temperature (HDT), typically above 200°C and even up to 250°C. It maintains mechanical strength and dimensional stability under high temperatures with excellent creep resistance. Exceptional Mechanical Strength and Modulus Origin: Dense three-dimensional crosslinked network and rigid molecular chains. Performance: The cured product shows very high hardness, compressive strength, tensile strength, and modulus, giving it strong load-bearing capacity. Excellent Chemical Resistance Origin: The high crosslink density creates a compact and chemically inert network structure, making it difficult for solvents or chemical agents to penetrate or swell the material. Performance: It offers outstanding resistance to a wide range of organic solvents, acids, and alkalis. Its chemical resistance, particularly at high temperatures, is far superior to that of conventional epoxy resins. Superior Electrical Insulation Properties Origin: Stable chemical structure and high crosslink density. Performance: Maintains excellent dielectric strength and volume resistivity even under high temperature and humidity conditions. Processing Challenges High Viscosity: Due to its high functionality and rigid structure, YLEP-638 has very high viscosity at room temperature and must be heated (e.g., to 60–80°C) for casting, impregnation, or prepreg preparation. High Brittleness: The high crosslink density and rigid structure also result in low toughness, poor impact resistance, and low elongation at break, so it often requires the addition of toughening agents. Main Applications of YLEP-638 YLEP-638 + DOPO Used to produce halogen-free phosphorus-containing epoxy systems, successfully incorporating efficient phosphorus-based flame-retardant units into a high crosslink density epoxy network. The resulting materials combine excellent mechanical properties, heat resistance, and flame retardancy, making them ideal for green electronic encapsulation, halogen-free PCBs, high-performance flame-retardant insulating materials, and aerospace composites. Also used in carbon fiber prepregs, tennis rackets, and golf clubs.   YLEP-638 + Methacrylic Acid / Styrene Used to produce high-temperature- and corrosion-resistant phenolic epoxy vinyl ester resins, widely applied in flue gas desulfurization (FGD), power plant desulfurization tower linings, chemical storage tanks, and scrubbers for harsh environments.   YLE-128 + YLEP-638 + YLE-601 or YLE-604 Used for solder mask inks in copper-clad laminates and for anti-corrosion, high-temperature coatings (such as 900–1200°C heat-resistant and anti-oxidation coatings).   YLEP-638 + Curing Agent DDS Used to produce epoxy insulating varnishes for VPI (Vacuum Pressure Impregnation) processes, forming a strong, integrated “armor” layer on electrical coils. This layer resists high-voltage breakdown and withstands the intense heat and mechanical stress generated during motor operation. It is an essential insulation material for modern high-end electrical equipment, used in high-voltage motors, wind power generators, and traction motor stator coils, providing both insulation and flame-retardant protection. Also used in the manufacture of insulating tubes, rods, and plates.

When it comes to large-scale exports of epoxy resins—whether in liquid, solid, or semi-solid form—ensuring safe transport, regulatory compliance, and on-time delivery is essential. At Yolatech, we’ve compiled the following practical tips to help professionals in trade, manufacturing, and logistics plan more efficiently and execute with confidence.   1. Choose the Right Packaging Format Proper packaging is the first line of defense against leakage, contamination, and damage during transport. Liquid resins: We recommend 200L/240KG steel drums, 1000L IBC tanks, or ISO tank containers for bulk shipping. Packaging must be leak-proof and corrosion-resistant. Solid resins: Typically packed in multi-layer kraft paper bags with plastic liners or fiber drums to prevent moisture ingress. Semi-solid resins: Should be stored in tightly sealed metal or thick plastic drums to avoid deformation or softening, especially in hot climates. Tip: Labels should clearly display product name, batch number, net/gross weight, and hazard symbols if applicable. 2. Follow Dangerous Goods Transport Regulations Some epoxy resins are classified as hazardous materials. It is important to: Check the MSDS (Material Safety Data Sheet) for transport classification; Ensure compliance with IMDG (marine), IATA (air), or ADR (road) regulations depending on the shipping mode; Apply proper hazard labels on all packaging (e.g., corrosive, environmentally hazardous). Following regulations is not only a legal requirement but also critical for safety and customs clearance. 3. Palletizing and Load Securing To improve handling and protect goods during shipment: Use fumigated wood pallets (with IPPC marking) or plastic pallets, depending on import country requirements; Secure all drums or bags on pallets using stretch film and strapping bands; Add anti-slip sheets, corner guards, or partition pads to reduce movement and minimize risk of damage.   4. Plan Routes and Schedules Carefully Some specialty epoxy resins are sensitive to heat and should not be exposed to high temperatures for extended periods. In summer, refrigerated containers are recommended to maintain product stability. Be sure to check the customs regulations, public holidays, and vessel schedules at both origin and destination. Build in sufficient lead time to avoid unexpected delays. 5. Work with Experienced Logistics Partners Partner with freight forwarders who have specific experience handling chemical and hazardous goods shipments. For first-time shipments or newly adopted packaging methods, we recommend thorough pre-shipment coordination between seller and buyer to confirm all details, including labeling, pallet configuration, and document accuracy. Maintain real-time communication with both the logistics provider and your customer throughout the shipping process. 6. Prepare All Required Documentation in Advance Common export documents include: Commercial invoice & packing list COA (Certificate of Analysis) or test report Bill of Lading (B/L) or Air Waybill (AWB) Export license, MSDS, or Certificate of Origin (as required by the destination country) Ensure all document content is consistent with product labels to avoid clearance delays or inspection issues.   Proper packaging, complete documentation, and efficient logistics planning are the cornerstones of successful epoxy resin exports. As a professional manufacturer, Yolatech understands that every shipment is not just a delivery—it’s a commitment to quality and reliability.   If you need support in selecting epoxy resin products, designing packaging solutions, or arranging international shipments, feel free to reach out to the Yolatech team. With stable products and responsive service, we’re here to support your global operations with confidence.

  In the world of industrial coatings, adhesives, composites, and electrical insulation, epoxy resins are essential for their outstanding performance and versatility. Among them, YLE-128 epoxy resin stands out as a high-quality Bisphenol-A based liquid epoxy resin that is trusted by manufacturers and formulators worldwide. In this article, we’ll explore what YLE-128 is, its key properties, typical applications, and why it is considered a reliable and consistent alternative to mainstream options like Epon 828, YD-128, and D.E.R. 331. What Is YLE-128? YLE-128 is a liquid Bisphenol-A type epoxy resin with a medium molecular weight and an epoxy equivalent weight (EEW) typically ranging between 184–194 g/eq. It is produced through the reaction of Bisphenol-A with epichlorohydrin, resulting in a highly reactive resin with excellent chemical resistance, mechanical strength, and adhesion characteristics. This resin is often referred to as a standard liquid epoxy resin (LER) and serves as a base component for many two-component systems, especially when combined with various hardeners (amines, anhydrides, etc.). Key Properties of YLE-128 Property Typical Value Appearance Clear, colorless to pale yellow liquid Viscosity @ 25°C 11,000–15,000 mPa·s Epoxy Equivalent Weight 184–194 g/eq Color (Gardner) ≤ 1 Density @ 25°C ~1.16 g/cm³ Flash Point (Closed cup) > 150°C     These properties make YLE-128 suitable for both ambient and heat-cure formulations across multiple industries.   Applications of YLE-128 Epoxy Resin Thanks to its versatility, YLE-128 is used in a wide range of industrial and commercial applications: 1. Protective Coatings Used in anti-corrosion coatings for pipelines, storage tanks, marine equipment, and concrete floors. Offers excellent chemical resistance and strong adhesion to substrates. 2. Adhesives Applied in structural adhesives for metal, plastic, wood, and composite bonding. Compatible with a variety of curing agents to tailor performance. 3. Composites Widely used in wind turbine blades, automotive components, and sporting goods. Reinforced with glass or carbon fibers for lightweight strength. 4. Electrical Insulation Suitable for potting and encapsulating transformers, insulators, and circuit boards. High dielectric strength and excellent dimensional stability. 5. Construction Utilized in flooring systems, epoxy mortars, and anchoring applications. Good resistance to moisture, solvents, and mechanical wear. Why Choose YLE-128? A Reliable Alternative to Global Brands ✅ Consistent Quality: Manufactured under strict quality control, YLE-128 offers batch-to-batch consistency. ✅ Competitive Pricing: More cost-effective than Western brands without compromising performance. ✅ Flexible Supply: Readily available and supported by responsive technical service. ✅ Global Compatibility: Interchangeable with industry-standard grades such as: Epon 828 (Hexion) D.E.R. 331 (Dow) YD-128 (Kukdo) Final Thoughts YLE-128 epoxy resin has proven itself as a reliable, high-performance material across multiple industries. Whether you are formulating coatings, adhesives, or insulation systems, YLE-128 offers the performance of top international brands with the added benefits of affordability and dependable supply. For formulators seeking a Bisphenol-A based liquid epoxy resin that meets demanding standards, YLE-128 is a name worth remembering.