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The molecular weight of quality Polyamide hardeners is usually between 500 and 9000. According to the different properties of the diamines involved in the reaction and the different mixing ratios of the dimer acid and the diamines in the reaction, the properties of the polyamides produced will also be different.
In recent years, the most widely used quality Polyamide hardeners on the market are polyamide 650 or polyamide 651. Polyamide 650 is generally prepared from dimer acid and diethylenetriamine, while polyamide 651 is generally prepared from dimer acid and triethylenetetramine.
According to the application, product performance and process conditions, we can choose suitable quality Polyamide hardeners. Generally, quality Polyamide hardeners with small amine value have high viscosity and are mostly suitable for bonding. Quality Polyamide hardeners with large amine value and low viscosity are mostly suitable for casting and composite materials.
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E-mail： sales@hanepoxy.com
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