Introduction of phenolic amine coatings

The phenolic amine coating is a kind of high-performance coating based on phenolic amine curing agent.

Phenolic amine curing agent usually refers to the modified amine curing agent of phenol, aldehyde and polyamine by Mannich condensation reaction (Mannich reaction).

This chemical reaction involves the condensation of compounds containing active hydrogen with formaldehyde and binary amines to produce compounds containing phenolic hydroxyl, amino (-NH2), and secondary amino (-NH-) groups. These functional groups can improve the reaction speed of phenolic amine curing agent and meet the needs of low temperature and wet environment.

The performance of phenolic amine curing agent can be adjusted according to the different types of phenols, aldehydes and amines, reaction ratio and reaction process. Common polyamines include fatty amines (such as ethylenediamine, Hexamethylene diamine, diethylenetriamine), polyether amines, aromatic amines, and alicyclic amines.

The modification of these polyamines makes phenolic amines cured with different performance characteristics:

1. The cured material modified by fatty amine has good flexibility, water resistance and adhesion.

2. The toughness of the cured material modified by polyether amine is higher

3. The curing agent modified by aromatic amine has excellent heat resistance and acid and alkali corrosion resistance.

Alicyclic amine modified curing agent, light color, good gloss, good weather resistance.

Phenolic amine curing agent also reduces the volatile irritation and toxicity of organic amines, and the ratio range of epoxy resin is wide, which can control the curing reaction speed. In addition, the phenolic skeleton introduced in the phenolic amine structure improved the heat resistance of the cured material, and the phenolic hydroxyl group promoted the reactivity of the curing agent and reduced the assimilation reaction temperature.

Application of phenolic amine coatings

Phenolic amine coatings are widely used in many fields due to their excellent properties:

1. Industrial corrosion protection: phenolic amine coating has good chemical resistance and acid and alkali corrosion resistance, suitable for corrosion protection in industrial environment.

2. Ships: In the manufacture and repair of ships, phenolic amine coatings provide lasting anti-corrosion and anti-fouling properties.

3. Container: Container is exposed to harsh environment for a long time, phenolic amine coating can protect it from corrosion.

4. Floor coating: phenolic amine floor coating has excellent wear resistance and chemical resistance, suitable for industrial floor.

5. Adhesive: phenolic amine is also used in the manufacture of structural adhesives, building structural adhesives, automotive sealant and electronic packaging to provide high strength and durable bonding.