Effect of polyvinyl alcohol powder on coating

Polyvinyl alcohol powder is widely used in chemical industry, building materials, architectural coatings, daily chemical industry, food pharmaceutical and other industries. Due to the unique characteristics of polyvinyl alcohol, as long as a small amount of polyvinyl alcohol powder is added to the architectural coating, the performance of the coating can be greatly improved. Let's focus on common coatings as an example to see the impact of the addition of polyvinyl alcohol powder on the coating.

The first is lime calcium based putty. Adding a little polyvinyl alcohol can significantly improve the cohesive strength, adhesion and water resistance of the putty coating, reduce the use of lime calcium powder, and significantly improve the phenomenon of delamination and scar during grinding. Improve the surface fineness of putty after polishing, and the effect is very ideal. Adding polyvinyl alcohol powder to the cement-based exterior wall putty can improve the cement setting speed, improve the early strength of the putty, have good film-forming property, excellent durability, and it is not easy to remove the powder after thinning.

Add 6kg of polyvinyl alcohol powder to a ton of heavy calcium and appropriate amount of cellulose (both hydroxypropyl and carboxymethyl) to obtain ordinary putty powder with far better quality than starch and 821. This kind of putty is intermediate in hardness between gray calcium putty and starch putty, and has excellent scraping performance. The two putty are far inferior to their adhesion, flexibility, grinding fineness and durability. If combined with gypsum powder and retarding technology, we can get more high-grade excellent home decoration putty powder. This kind of putty powder has long service life and good decorative effect, and will become the development direction of putty industry in the future.

In the quick sol water powder, polyvinyl alcohol powder is the main binder, which is combined with an appropriate amount of hydroxypropyl methyl cellulose, supplemented by an appropriate amount of thickening and complexing agent, to achieve a high-performance water powder that is convenient for environmental protection, has high bonding strength, can be mixed with cement gypsum for wet wall leveling, and can be used as a separate batch of double flying powder without de powdering. Adding polyvinyl alcohol powder to dry powder mortar has good film forming property. When it is used in combination with cellulose ether water retaining agent, it can improve the flexibility and water retention of various cement mortar and gypsum building materials, improve the bonding strength of mortar, and effectively prevent peeling, cracking and hollowing.

Finally, we can see that the addition of polyvinyl alcohol powder has a great impact on the coating. Not only the coating mentioned above, but also the addition of polyvinyl alcohol powder in other fields will play the same role. It can be seen that the role of polyvinyl alcohol powder is quite large.