YLH-3054 is a chemical-resistant epoxy hardener developed for heavy-duty epoxy corrosion protection. This modified polyamine epoxy hardener offers outstanding chemical resistance against most organic acids, alcohols, edible oils, fats, and solvents. Its chemical resistance is further improved when combined with phenolic novolac epoxy resin, supporting epoxy novolac pipeline coating formulations where greater chemical resistance is required.     As a high-temperature epoxy hardener for pipeline coatings and internal linings, YLH-3054 combines chemical resistance, early water resistance, thick-film crack resistance, and high-temperature performance in one epoxy curing system. The evaluation below covers thermal aging at 200°C for 168 h and thermal cycling from 230°C to -60°C. The data are relevant to petroleum pipeline coating development and to the use of this epoxy hardener for steel pipe coating and other high-temperature anticorrosive coating systems.   Advantages for Pipeline Corrosion Protection Chemical-Resistant Epoxy Hardener for Pipeline Corrosion Protection Chemical tank lining; Pipeline internal lining; Heavy-duty steel anti-corrosion primers.   Early Water Resistance and Thick-Film Performance Excellent early water resistance, good flexibility, providing good crack resistance in thick film applications. Cathodic Protection Compatible Coating Systems Excellent compatibility with cathodic protection systems. Suitable for the design of related pipeline corrosion-protection systems. High-Temperature Pipeline Coating Performance After 200°C/168 h exposure and thermal cycling from 230°C to -60°C, the tested system showed no chalking, cracking, or peeling.   Typical Properties Appearance Light yellow liquid Viscosity, mPa.s@25°C 0-100 Amine value, mg KOH/g 280-320 AHEW, g/eq 160 Added Weight, PHR 75-85   To evaluate YLH-3054 as an epoxy curing agent for pipeline coating applications, Formulation A was compared with the control formulation for curing, adhesion, and high-temperature performance. YLH-3054 was added separately as the curing component (Part B) at 20.8 g. The formulation and test results are shown below.     Formulation A (YLH-3054 Curing System) No. Raw Material Amount 1 Xylene 13.5 2 n-Butanol 3.4 3 YLEP-638 23.5 4 Talc 19.8 5 Yellow Iron Oxide 1 6 Barium Sulfate 31.9 7 Titanium Dioxide 6 8 Carbon Black 0.1 9 Ultra 0.8 Hardener YLH-3054 (Part B) 20.8 g   1. BK Drying Item Surface Dry (25°C) Hard Dry (25°C) Formulation A 2h 3h Control Formulation B 1.5 ≥6h At 25°C, Formulation A reached surface dry in 2 h and hard dry in 3 h. The control reached surface dry in 1.5 h but required ≥6 h for hard dry. Although Formulation A was slightly slower to reach surface dry, it completed effective crosslinking much faster.   Figure 1  BK Drying Test   2. Pull-off Adhesion for Pipeline Coatings Item Pull-off Adhesion (Before) / MPa Pull-off Adhesion (After) / MPa Formulation A 23.32  23.03 21.63    18.36 Control Formulation B 7.62   8.22 21.14    21.08 Before heat exposure, pull-off adhesion of Formulation A was 23.32/23.03 MPa, compared with 7.62/8.22 MPa for the control. This shows that Formulation A developed higher initial adhesion under ambient curing conditions. Note: "Before" and "After" refer to before and after baking at 200°C for 168 h. Figure 2  Adhesion Test   3. Thermal Aging Performance at 200°C Item Film Surface Condition After Baking at 200°C for 168 h Formulation A Discoloration observed; no chalking, cracking, or peeling. Control Formulation B Discoloration observed; no chalking, cracking, or peeling. After baking at 200°C for 168 h, both coatings showed discoloration but no chalking, cracking, or peeling, and the coating films remained intact. Figure 3  Thermal Aging Test   4. Thermal Cycling Performance Item Film Surface Condition After 3 Thermal Cycles of 230°C (16 h) and -60°C (8 h) Formulation A Discoloration observed; no chalking, cracking, or peeling. Control Formulation B Discoloration observed; no chalking, cracking, or peeling. After 3 thermal cycles between 230°C (16 h) and -60°C (8 h), both coatings showed discoloration but no chalking, cracking, or peeling, demonstrating stable resistance to thermal cycling. Figure 4  Thermal Cycling Test   5. Conclusion   Comparative results show that the main strengths of Formulation A are faster hard-dry development and earlier adhesion build. Its surface-dry time was 2 h, slightly longer than the control at 1.5 h, but Formulation A reached hard dry in 3 h while the control required ≥6 h. In addition, pull-off adhesion after ambient cure reached 23.32/23.03 MPa for Formulation A, compared with 7.62/8.22 MPa for the control.     After baking at 200°C for 168 h and thermal cycling between 230°C and -60°C, neither coating showed chalking, cracking, or peeling. These results indicate that Formulation A achieved a good balance among curing efficiency, initial adhesion, and coating film integrity under high-temperature conditions.  

Product Name: 2-METHYLIMIDAZOLE Product Code: 2-MI CAS No.: 693-98-1 Product Category: Methyl-substituted imidazole compound     1. Product Information Item Information Product Name 2-METHYLIMIDAZOLE Chemical Name 2-Methyl-1H-imidazole；2-MI Product Code 2-MI CAS No. 693-98-1 Molecular Formula C4H6N2 Molecular Weight 82.10 g/mol Category Methyl-substituted imidazole compound   2. Product Description 2-MI is a methyl-substituted imidazole compound. According to the company TDS, it is white to off-white crystalline powder, soluble in water, alcohol, and acetone. The product is moisture absorbent. 2-MI can be used as Epoxy curing agent and Pharm intermediate. In epoxy resin systems, imidazole compounds are commonly used for curing or curing promotion. Final suitability should be confirmed by testing in the target formulation.   3. Structure Features and Performance Notes 1. Methylimidazole structure 2-MI contains an imidazole ring and a methyl substituent. This structure supports its application in epoxy curing-related systems. 2. Crystalline powder form The TDS describes the product as white to off-white crystalline powder and states that it is soluble in water, alcohol, and acetone. 3. Moisture absorbent The TDS states that the product is moisture absorbent. Therefore, storage and handling should avoid prolonged exposure to humid conditions.   4. Typical Properties Item Typical Value Appearance White to off-white crystalline powder Purity, % ≥99.0 Water, % ≤0.5   Note: The above data are from Typical Properties in the company TDS. Final delivery specifications shall be subject to the company TDS / COA.   5. Applications 1. Epoxy curing agent The company TDS lists Epoxy curing agent under Applications. Dosage and curing performance should be confirmed by testing in the final formulation. 2. Pharm intermediate The company TDS lists Pharm intermediate under Applications. Final use should be confirmed based on the specific synthesis route and customer application requirements. 3. Epoxy system applications 2-MI can be used as a related component in epoxy systems where imidazole compounds are required for curing reaction adjustment.   6. Storage, Packaging & Safety Item Information Packaging Drums Storage & Handling Store in a cool, ventilated warehouse, preferably in a well-sealed original container. Storage Life At least 12 months from the date of manufacture in the original packing in ambient temperatures. Handling Protection Contact of eyes and skin with this resin should be avoided, and it is recommended to wear a gas mask and gloves. Wear goggles or face shield when any splashes or droplets are possible. Safety All safety information is provided in the Material Safety Data Sheet.     7. Notice This document is prepared for product information database use. Product name, CAS No., typical properties, applications, storage and packaging information are mainly based on the company TDS. Molecular formula and molecular weight are cross-checked with public chemical databases. For external use, the official TDS, MSDS, COA and contract terms shall prevail.

As an essential partin the epoxy system, the curing agent largely determinesthe cross-linking network structures, as well as thechemical and physical properties of the epoxy resins aftercuring.Epoxy resins cannot be used independently fromthe curing agents, no matter they are used in coatings,potting compounds or wind turbine blades. In this article,we will briefly talk about epoxy curing agents and theircharacteristics in different applications.   Bisphenol A epoxy resin is not suitable for outdoorcoatings and decorative coatings, because of its poorweatherability, easy powdered paint film and othershortcomings. It is mostly used for anti-corrosion paintsmetal primers and insulating paints.However, coatingswhich are made of heterocyclic or cycloaliphatic epoxyresins can be used outdoors.Synasia cycloaliphatic epoxy resin S-2l is either Uv curableor thermally curable. when UV cured with cationicphotoinitiator UVI-6992, it provides high TG and excellentresistance to UV light. Suitable applications includeoutdoor coatings and solvent-free coatings, where itsweatherability is better than that of acrylic-polyurethanecoatings, UV curable coatings have the advantages of fastcuring speed, good gloss, no air bubbles, no need to cure at high temperature.   Potting is an important application field of epoxy resinsystem. It is widely used in electronic manufacturingindustry. It is also an indispensable and importantinsulating material in electrical industry. Using acidanhydride as curing agent for epoxy potting compound hasthe following characteristics: small shrinkage rate , no by-products; good heat resistance; first-rate sealingperformance, excellent insulation, which is not achievedby unsaturated resin and phenolic resin. Althougharomatic amines have good performance, they are mostlysolid and come with poor process operability, thus makingthem rarely applied in potting field. In most cases, acidanhydride curing agent is selected, which is consideredone of the most important components of the thermallycured epoxy system.As a high-purity, low-viscosity, low-halogen cycloaliphaticepoxy resin, Synasia S-06E has high transparency, lowchlorine content(VOC<50ppm) and excellent non-yellowing performance.It can be thermally cured with acidanhydrides (such as MeTHPA and MeHHPA) or UV cured.It can also be cured with aliphatic amines under catalyticaction.Typical applications include electrical casting andelectronic potting of outdoor products. It is especiallysuitable for insulation potting and bonding of electricaland electronic components that require high thermalshock performance, such as outdoor transformers,inductors, laptops, mobile phones, and other digital products.   Castables can be small electronic components, precisioninstruments, military communication systems, largetransformers, motor coils, current transformers, cablejunction boxes and cable terminals in high-voltageelectrical appliances. Castables are widely used in the electrical industry.   Due to the gradual increase in the power generationcapacity requirements of wind power generators, thecorresponding blade size should also gradually increase,and there are higher standards for material weight,strength and stiffness performance requirements. For thisreason, pultruded carbon sheets which are made of high-performance epoxy resin and reinforced with carbon fiberin the blade manufacturing process are most likely tobecome the mainstream solution in the future.Synasia S-720 is a low-viscosity tetrafunctional epoxy resinIt can be cured with acid anhydride or amine curing agent.It has been maturely used in the manufacture ofcomposite materials for wind turbine blades. This productis featured by fast curing speed, high TG, high strength,excellent solvent resistance and corrosion resistance, etc.Methyltetrahydrophthalic anhydride, also called MTHPA isthe most commonly used curing agent in high.performance epoxy resin based and carbon fiber (or glassfiber) reinforced composite materials for pultrusion ofwind turbine blades. The ratio of MTHPA to epoxy resin isalmost 1:1.   Nanjing Yolatech provides all kinds of high purity and low chlorine epoxy resins, including Bisphenol A epoxy resin, Bisphenol F epoxy resin, Phenolic epoxy resin, Brominated epoxy resin, DOPO modified phenolic epoxy resin, MDI modified epoxy resin, DCPD epoxy resin, Multifunctional epoxy resin, Crystalline epoxy resin, HBPA epoxy resin and so on. And we also could provide all kinds of curing agents or hardeners and diluents.         We will be at your service 24 hours a day. Pls contact us freely.