In terms of hue, alicyclic group is shallow and basically transparent, while aliphatic group and aromatic group have significant coloring degree. In terms of viscosity, there are also great differences. The alicyclic group is only a fraction of Pa · s, while polyamide is very viscous, up to several Pa · s, and most aromatic amines are solid. The length of application period is exactly opposite to the curing property. The aliphatic group has high reactivity, while the alicyclic group, amide and aromatic group decrease in turn.
What are the functions of curing agent
Hard: the Mohs hardness of the treated concrete floor will reach 8, increasing by about 200%;
Wear resistance: solidify various components in the concrete into hard and dense entities, and increase the wear resistance to about 6 times;
Friction: surface friction increased by 22.5%;
Dust prevention: chemical reaction occurs with silicate in concrete to form a compact whole and prevent surface dust;
Skid resistance: prevent salt and alkali components from precipitating from the surface, so as to prevent slippage and efflorescence of concrete surface;
Compression resistance: the treated sample is 40% stronger than the untreated sample, and the bending strength is more than twice as high;
Impermeability: it can effectively penetrate into the concrete to lock pores, and prevent water, oil and other dirt from penetrating into the concrete;
: Effectively prevent chloride ion and ultraviolet radiation, and concrete will not be affected by exposure to electromagnetic or water mist;
Corrosion resistance: the corrosion resistance of treated concrete floor is greatly improved;
Adhesion: the adhesion with epoxy resin is increased by 21.9%, and the adhesion with paint is basically unchanged;
Curing force: during the one day curing process of concrete, the water retention rate increases by 94.5% to prevent cracking;
Brightness: the treated concrete floor will have a marble like luster, and the longer you use it, the better the gloss;
Therefore, aliphatic amines, aliphatic epoxides and polyamides are mostly used, especially the coatings and adhesives used in winter have to be used together with polyisocyanates, or polyisocyanates with foul smell are used. As for medium temperature curing agent and high temperature curing agent, the choice should be based on the heat resistance of the object to be landed and the heat resistance, adhesion and drug resistance of the cured object.
The adhesive property, alkali resistance and water resistance of the cured product of aliphatic polyamine are excellent. Aromatic polyamines are also excellent in drug resistance. As the nitrogen element of amino group forms hydrogen bond with metal, it has excellent antirust effect. The higher the amine concentration, the better the antirust effect.
Curing agent, also known as curing agent, hardener and setting agent, can harden, seal and strengthen concrete; Its variety has a great influence on the mechanical properties, water resistance, heat resistance and corrosion resistance of cured products.
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