Benzoxazine compounds can be synthesized from phenols, formaldehydes and amines with oxygen nitrogen heterocyclic structure with halogen free, which can be homopolymerized to form a polybenzoxazine thermoset networks by heating, also can be co-cured with traditional thermosetting resins like epoxy resin, phenolic resin.   Benzoxazine resins, when heated without curing agent, homopolymerize to form a rigid, nitrogen contained and strong cross-linking network structure that can be used for manufacturing products with excellent mechanical property, high temperature resistance and flame retardancy(UL94-V0). Furthermore, benzoxazine, as a curing agent, can be used in conjunction with all the epoxy resins, phenolic resins etc. to achieve high thermal resistance, strong, low CTE, flame retardancy with halogen free. With these qualities, benzoxazines offer many advantages for formulating halogen-free systems to be used in stringent requirement of CCLs, high speed PCBs, flame retardancy electrical materials and others.   Benzoxazine Key Properties The flame retardancy of benzoxazine series can reach UL-94 V0 level with halogen free, which can be used to improve flammability resistance of products. No byproduct releasing during the curing process, and the dimensional shrinkage rate almost 0. The whole series of products have low water absorption, which can greatly improve the rate of good products. The excellent dielectric property of low dielectric series products shows less effect in frequency fluctuation, witch is intended for use in M2/M4 class PCBs. Benzoxazine products with a wide coverage of Tg and selectivity(150~450℃), and with char yield 78% at 800℃. Benzoxazine resins can be toughened by using unique patented technology, which can significantly improve the machinability of plate products.

  n-Heptanol (1-Heptanol) and n-Hexanol (1-Hexanol) are both primary alcohols, which means they each have a hydroxyl group (-OH) attached to a primary carbon atom. These alcohols are important in various industrial applications due to their unique properties.   n-Heptanol (1-Heptanol) Chemical Structure and Properties Chemical Formula: C7H16O Molecular Weight: 116.2 g/mol Boiling Point: 175.8 °C (348.4 °F) Density: 0.818 g/cm³ 1-Heptanol, also known as heptan-1-ol or heptyl alcohol, is a clear, colorless liquid with a mild, characteristic odor. It is slightly soluble in water but more soluble in organic solvents such as ethanol and ether.   Uses and Applications Flavoring Agent: Due to its pleasant odor, 1-Heptanol is used in the flavor and fragrance industry to impart fruity and floral notes. Chemical Intermediate: It serves as a precursor in the synthesis of various esters, which are used in perfumes and flavorings. Solvent: 1-Heptanol can be used as a solvent in the formulation of resins, coatings, and pharmaceuticals. Lubricant Additive: It is sometimes used as an additive in lubricants to enhance performance and stability.   Production 1-Heptanol is produced through the catalytic hydrogenation of heptanal or by the hydroformylation of hexene followed by hydrogenation.   n-Hexanol (1-Hexanol) Chemical Structure and Properties Chemical Formula: C6H14O Molecular Weight: 102.2 g/mol Boiling Point: 157 °C (315 °F) Density: 0.814 g/cm³ 1-Hexanol, also known as hexan-1-ol or hexyl alcohol, is a colorless liquid with a slightly floral odor. It is moderately soluble in water and highly soluble in most organic solvents.   Uses and Applications Fragrance and Flavor: Similar to 1-Heptanol, 1-Hexanol is used in the fragrance industry to produce floral and green odors. Solvent: It acts as a solvent for lacquers, resins, and oils. Plasticizer: 1-Hexanol is used in the production of plasticizers, which are added to plastics to increase their flexibility. Intermediate in Chemical Synthesis: It is a building block in the synthesis of various chemicals, including plasticizers, pharmaceuticals, and surfactants.   Production 1-Hexanol is typically produced by the hydroformylation of pentene, followed by hydrogenation of the resulting aldehyde. Alternatively, it can be obtained from the reduction of hexanoic acid.   Conclusion n-Heptanol and n-Hexanol are versatile chemicals with a wide range of applications in various industries. Their roles as solvents, intermediates in chemical synthesis, and components in fragrances and flavors highlight their importance. Understanding their properties and production methods can help optimize their use in industrial processes and product formulations.  

Product information 1.3-BAC is a diamine substance, it is colourless transparent and low viscosity liquid at room temperature, it has obvious ammonia smell, corrosive and combustible when it meets open fire. It belongs to cyclic aliphatic amine, when used as epoxy curing agent, it has both the high activity of aliphatic amine and the excellent mechanical properties, temperature resistance and yellowing resistance of alicyclic amine, it is often used in the preparation of high-quality epoxy adhesive products.   Application Mainly used as epoxy curing agent or preparation of modified epoxy curing agent, not only low viscosity, good operability, and excellent room temperature curing performance, its products in the mechanical properties, temperature resistance, water resistance, chemical resistance and other aspects of the excellent preparation of high-quality epoxy adhesives, flooring paints, etc., are widely used in high-end flooring, jewelry adhesive, crystal adhesive, stone adhesive industry; at the same time, due to its excellent mechanical properties, good operability, also used in composite materials. At the same time, due to its excellent mechanical properties and good operability, it is also used in composite material industry (automobile, wind blade, etc.).   Ratio Epoxy resin 128 (epoxy equivalent 190):100 Amount of curing agent: 17~20   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.  

Methylcyclohexylenediamine (HTDA) is a kind of alicyclic amine monomer with side methyl group, it is a new type of alicyclic amine epoxy resin curing agent, Cas No:13897-55-7. It can be used as curing agent alone, or mixed with other common epoxy curing agents (e.g. aliphatic amine, alicyclic amine, aromatic amine, acid anhydride, etc.) or general-purpose accelerators (e.g. tertiary amine, imidazole), to cure epoxy resins in a wide range of temperatures, applicable to composites, coatings, adhesives, flooring and other fields, can be used in the organic synthesis of polyamides, polyimides and other polyurethanes; it can be used in polyurethane to do the amine chain expander, and to form urea with the isocyanate group, which is the main component of the urea chain. It can be used in polyurethane as amine chain extender to form urea bond with isocyanate group and improve the comprehensive performance of the product.   Product characteristics Unique application period without loss of mechanical strength Very low viscosity, easy to mix with other curing agents Low active hydrogen equivalent, small additive ratio Very low vapour pressure Moderate curing speed for improved handling in composites, adhesives and flooring applications   References                       Appearance (25°C): colourless or yellowish transparent liquid Colour: ≤1 Viscosity(mPa.s/25°C): 5-15 Amine value (mgKOH/g): 850-900 Active hydrogen equivalent (g/ep): 32 Purity(%): ≥99.5 Water content(%):≤0.2 Boiling point(℃):213 Specific gravity(g/mm³):0.94 Additive amount: 16-17   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.    

1,3-cyclohexanedimethylamine CAS No.579-20-6,short for 1,3-BAC,is used as a raw material for epoxy resin curing agents in a wide range of applications around the world. 1,3-BAC, as an alicyclic amine, has excellent hardness, weathering, and chemical resistance, a refined appearance, and a faster cure rate.   Typical Physical and Chemical Data Appearance: Colourless transparent liquid Colour (G):1.0 Max Viscosity (mPa.s/20℃): 9.1 Active hydrogen equivalent(g/eq): 35.6   Advantages of 1,3-BAC as an epoxy resin curing agent Excellent UV resistance and transparency Fast curing speed Excellent curing at high temperatures & high humidity Low active hydrogen equivalents, low additions Low solidification point Good curing even at low temperatures.   Application of 1,3-BAC      In jewellery adhesive 1,3-BAC's excellent resistance to yellowing provides a long-lasting guarantee for the glossy appearance of the jewellery adhesive. 1,3-BAC provides hardness guarantee for jewellery. 1,3-BAC lower addition faster curing speed to improve the overall cost-effective advantage.      In seam sealer Improve the curing speed, 1,3-BAC can fully guarantee the curing time. 1,3-BAC low colour, high transparency to fully guarantee the appearance of the product colour. 1,3-BAC provides the required hardness and strength to the product.     In composite materials 1,3-BAC low active hydrogen equivalent, low additive quantity can bring higher cost-effective advantage for products. 1,3-BAC high hardness, to provide assurance for the strength of the product. 1,3-BAC good chemical resistance, to ensure that the product's lasting use.     In laminating adhesive 1,3-BAC's excellent resistance to yellowing provides assurance of long-lasting colour stability of the cured product. 1,3-BAC's excellent colour transparency ensures the transparent and clear quality of the product. The low viscosity of 1,3-BAC ensures good workability.   1,3-BAC (1,3-cyclohexanedimethylamine) is now widely used as epoxy resin curing agent in coatings, adhesives, composites, etc. 1,3-BAC is one of the amines with less additive quantity at present, and its excellent product appearance and performance make it have an outstanding cost-effective advantage.   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 epoxy resin curing agents or hardeners and diluents.   We will be at your service 24 hours a day. Pls contact us freely.  

  Epoxy resins are commonly used as a matrix for materials such as adhesives, coatings and composites, and are widely used in construction, machinery, electrical and electronic, aerospace and other fields. A complete concept of epoxy resin constituents by four aspects of the composition. However, in practice, it is not necessary to have all four aspects of the components, but the resin composition must include the curing agent, which shows the importance of the curing agent. Epoxy resin components Epoxy resin Epoxy resin Main part，bisphenol A type and other types of epoxy resins Curing agent Reacts with epoxy resins to form three-dimensional network polymers Components for modification Plasticiser Gives epoxy components plasticity, but reduces its heat and chemical resistance Toughening agent Improved impact resistance without compromising other properties Filler Increase weight, improve curability, mechanical properties, such as calcium carbonate, mica, etc Flame retardant agent To make the epoxy Components with flame resistance, there are filler flame retardant and reactive flame retardant Components used to regulate fluidity Diluent Reduce components viscosity, including active and inactive diluents Thixotropic agent Imparts thixotropic properties to epoxy compositions, e.g. asbestos, silica micropowder Other components Pigments, solvents, defoamers, levelling agents, tackifiers, etc. The reason why epoxy resins are widely used is the result of the versatile co-ordination of these components. Especially the curing agent, once the epoxy resin is determined, the curing agent plays a decisive role in the processability of the epoxy resin composition and the final performance of the cured product. Classification of epoxy curing agents 1. Classification by acid-base properties Type Curing agent name acidity Organic anhydrides, boron trifluoride and its complexes alkali Aliphatic diamines, polyamines, aromatic polyamines, dicyanodiamines imidazoles, modified amines   2. Classification by reactivity and chemical structure Curing agent Apparent curing agent Addition reaction Polyamine Simple amine Straight chain fatty amine DETA，TETA，DEPA，TEPA Polyamides Polyamides with different amine values Aliphatic amine MDA，IPDA Aromatic amine m-XDA, DDM, m-PDA, DDA Modified amine Anhydride Monofunctional group PA, THPA, HHPA, MeTHPA, MeHHPA, MNA, DDSA, HET Bifunctional group PMDA, BTDA, TMEG, MCTC Carboxyl group TMA, PAPA Polyphenol PN Polythiol PM, PS Catalyst reaction Anionic polymers DMP-30, 2E4MZ Cationic Polymers BF3∙MEA Latent curing agent Dicyandiamide Organic acid hydrazide Ketimine microcapsules   3. Classification by curing temperature Curing Temp. Curing agent type Curing agent name 0-20°C Low temperature curing agent Polythiols, aliphatic polyamines or promoters, aromatic polyamines or promoters 20-40°C Normal temperature curing agent Polyamide, tertiary amine 60-100°C Medium temperature curing agent Dibasic aminopropylamine, imidazole, tertiary amine salts, aliphatic amines 100-150°C Medium and high temperature curing agent Anhydride or promoter, BF3-ammonium salt, dicyandiamide/promoter, imidazole derivatives, hydrazides 150°C+ High temperature curing agent Aromatic polyamines, polyphenols, acid anhydrides   4. Classification by different usage Curing agent Curing at room temperature Heavy Duty Anti-corrosion Coatings Adhesives for civil engineering and construction Civil Engineering Coatings FRP General Adhesives Alicyclic polyamines Denatured polyamines Straight chain aliphatic polyamines Polyamides, polythiols Heat curing Electrically insulating material Acid anhydride, imidazoles, BF3 complexes Laminated materials Dicyandiamide, aromatic polyamines, linear phenolic resins Coatings   Tank materials Amino resins, methyl phenolic resins Powder material Dicyandiamide, aromatic polyamines, acid anhydrides Moulded material Linear phenolic resins Adhesives Aromatic polyamines, anhydrides, imidazoles, BF3 amine complexes     Structure and properties of curing agents A comprehensive understanding of the properties and characteristics of polyamine curing agents with the same functional group but different chemical structures is very important for the selection of curing agents. The main characteristics (color, ripeness, duration of use, etc.) also show a certain regularity. Color: (good) alicyclic->aliphatic->amide->aromatic amine(bad) Maturity: (low) alicyclic->aliphatic->aromatic->amide(high) Application period: (Long) Aromatic->Amide->Alicyclic->Aliphatic (Short Curability: (Fast) Aliphatic->Alicyclic->Amide->Aromatic (Slow) Irritation: (Strong) Aliphatic->Aromatic->Alicyclic-Amide (Weak) Gloss: (Excellent) Aromatic->Alicyclic->Polyamide->Aliphatic amide (Poor) Flexibility: (Soft) Polyamide->Aliphatic->Alicyclic->Aromatic (Rigid) Adhesion: (Excellent) Polyamide->alicyclic->aliphatic->aromatic (Good) Acid resistance: (Excellent) Aromatic->Alicyclic->Aliphatic->Polyamide (Inferior) Water Resistance: (Excellent) Polyamide->Aliphatic Amine->Aliphatic Cyclic Amine->Aromatic Amine (Good)     Development trend of curing agent Curing agent as a core substance to play the value of epoxy resin, the nature of the cured product depends on the performance of the curing agent, so the road of research on the curing agent has far-reaching significance. From the research of curing agent to date, combined with the current situation at home and abroad, curing agent is currently facing some of the following challenges and changes. The development of high activity and excellent heat resistance curing agent. The use of modified polyether amine, aliphatic amine or mixed compound to prepare high activity and heat resistance curing system. Due to the traditional epoxy resin in the curing performance is poor, especially low toughness, brittle, greatly affecting its use, so improve the performance of epoxy resin needs to improve the toughness. Improve the curing environment, overcome the volatility and toxicity of amine curing agent, and promote the development of room temperature curing agent by modifying amine with physical or chemical method. Improve the adaptability and specialty of epoxy resin in special environments, to meet the special environments such as humid, underground low temperature environment or underwater of reservoir dam repair. Curing agent and curing technology matching, will be a variety of curing technology (heat curing, microwave curing, light curing) combined with the selection of the appropriate curing agent may be able to get a comprehensive performance of the curing product. Heating type latent curing agent has great potential, can continue to study the dicyandiamide and its modified products, organic acid hydrazide, boron - amine complex, imidazole, microcapsules and other latent curing agent.