Polyetheramine D230 (CAS: 9046-10-0) is a linear polymer with a polypropylene glycol backbone and amino groups at the terminals, having a molecular weight of approximately 230 g/mol. Thanks to its unique molecular structure and properties, it is widely used as a curing agent for epoxy resins. The following is an in-depth discussion of its application in epoxy resin curing agents:
1）Excellent Flexibility: The ether bonds in the molecular chain of polyetheramine D230 enable it to impart good flexibility and impact resistance to cured epoxy resin products. It effectively enhances the crack resistance of epoxy resins, making them suitable for scenarios subject to dynamic stress or impact loads, such as wind turbine blades and automotive components.
2）Low Viscosity: Polyetheramine D230 has a low viscosity, facilitating easier mixing with epoxy resins. It reduces the system viscosity and minimizes solvent usage, which is beneficial for environmental protection and construction processes—especially for applications requiring low viscosity, such as spraying and potting.
3）Low-Temperature Curing Performance: Polyetheramine D230 can cure epoxy resins at relatively low temperatures, even as low as -10°C. This is crucial for engineering projects conducted in low-temperature environments, such as outdoor construction in winter or temperature-sensitive application scenarios.
4）Good Humidity and Heat Resistance: The cured epoxy resin exhibits excellent resistance to humid and hot conditions, making it suitable for applications in moist environments—such as marine coatings and anti-corrosion coatings for underground projects. It effectively resists the degradation of coating and material performance caused by humid and hot environments.
5）Superior Color and Appearance: After curing epoxy resin, polyetheramine D230 yields colorless, transparent, and high-gloss products without the whitening phenomenon commonly seen with other amine curing agents. This gives it unique advantages in fields requiring high appearance quality, such as crafts and decorative coatings.
The curing reaction between polyetheramine D230 and epoxy resin is relatively slow, requiring a long time at room temperature. For example, a mixture of E-51 epoxy resin and D230 at a ratio of 100g:30g needs 36 hours to cure at 25°C. To accelerate the curing speed, heat curing can be adopted, such as 3 hours at 60°C or 1 hour at 80°C.
1）Coatings Industry: In floor coatings, polyetheramine D230 serves as a curing agent to produce solvent-free epoxy floor coatings with environmental friendliness and wear resistance. In marine coatings and anti-corrosion coatings (e.g., wind turbine blade coatings), it provides excellent corrosion resistance and weatherability.
2）Adhesives Industry: It is used to prepare structural adhesives for applications in automotive, aerospace, and other fields. With its high toughness and adhesion, it ensures the reliability of component connections. It also performs well in electronic potting adhesives, offering good electrical insulation and thermal stability.
3）Composites Industry: It is applied in the preparation of carbon fiber-reinforced epoxy resin composites, such as fishing rods, golf clubs in sports equipment, and automotive lightweight components. It enhances the strength and toughness of composites while reducing their weight.
Polyetheramine D230 may cause irritation to the skin and eyes. Direct contact should be avoided during use, and operators must take appropriate protective measures, such as wearing gloves and goggles.
