Amines, acid anhydrides, polyamines
The main components of curing agents include amines, acid anhydrides, polyamines, etc.
Curing agent is a type of substance or mixture that promotes or controls the curing reaction. It is mainly used in the resin, plastic, adhesive and coating industries to cause cross-linking between polymer molecules. Common curing agent ingredients are:
Amines: including aliphatic amines, alicyclic amines and aromatic amines. Aliphatic amines have high reactivity, can be quickly cured at room temperature or low temperature, and are relatively insensitive to humidity; alicyclic amines can also be cured at room temperature and have a certain tolerance for humidity; aromatic amines are more sensitive to humidity.
Acid anhydride: reacts with epoxy resin to form an ester bond, has excellent electrical properties and chemical resistance, and is widely used in electronics and electrical appliances.
Polyamine: Aliphatic polyamine cured products have excellent adhesiveness, alkali resistance, and water resistance; aromatic polyamines are also excellent in chemical resistance and have excellent anti-rust effects.
In addition, the type and composition of the curing agent have a significant impact on its performance, including mechanical properties, heat resistance, water resistance and corrosion resistance. For example, aromatic curing agents are excellent in gloss but are highly irritating; aliphatic curing agents are less irritating but have poor gloss.
