The composition of putty and the role of its various components

Putty is a coating used to fill, level and repair defects on building surfaces. The main components include the following:

1. Expansion agent: The expansion agent can make the putty form a film quickly after construction, and produce a certain degree of volume expansion after drying, so as to fill the surface defects and improve the smoothness of the putty.

2. Filler: Filler is the main component in putty, which can fill the pores and depressions on the building surface, so as to achieve surface leveling and repair. Common fillers include gypsum powder, dolomite powder, talc powder, quartz powder, etc.

3. Adhesives: Adhesives can bond the fillers to form a hard film layer and tightly bond with the base layer. Common adhesives include polyvinyl alcohol, polyacrylates, epoxies, and the like.

4. Moisture : Moisture is the solvent and reaction medium of putty, which can promote the drying and hardening of putty, and affect its viscosity and fluidity.

The role of each component in putty

1. The expansion agent can promote the putty to quickly form a film, and produce a certain degree of volume expansion after drying, fill the surface defects and improve the smoothness of the putty.

2. Filler is the main component of putty, which can fill the pores and depressions on the building surface, so as to achieve surface leveling and repair.

3. The adhesive can make the fillers adhere to each other, form a hard film layer, and be closely combined with the base layer, thereby improving the adhesion and durability of the putty.

4. Moisture is the solvent and reaction medium of putty, which can promote the drying and hardening of putty, and affect its viscosity and fluidity. Moisture can also help fillers and binders mix evenly, reduce the viscosity of putty during construction, and improve its fluidity and coating performance.

To sum up, the various components in the composition of putty cooperate with each other to play the role of filling, leveling and repairing the defects of the building surface.