Recently, there have been frequent inquiries from clients regarding putty powder, such as its tendency to pulverize or its inability to achieve strength. It is known that adding cellulose ether is necessary to make putty powder, and many users do not add dispersible latex powder. Many people do not add adhesive powder to save costs, but this is also the key to why ordinary putty is prone to pulverization and product quality issues!
Ordinary putty (such as 821 putty) is mainly made of white powder, a little starch glue, and CMC (hydroxymethyl cellulose), and there are also those made of methyl cellulose and double fly powder. This type of putty has no adhesion and is not water resistant.
After dissolving cellulose and water, it can absorb water and expand. The water absorption rate of products from different manufacturers is different, and cellulose plays a water retaining role in the putty. After drying, the putty only temporarily has a certain strength, but over time, it will gradually lose powder, which is closely related to the molecular structure of cellulose itself. This type of putty is loose, has high water absorption, is prone to powdering, lacks strength, and elasticity. If topcoat is applied on it, low PVC is prone to blistering; High PVC is prone to dehydration, shrinkage, and cracking; Due to its high water absorption rate, it affects the film formation and construction effect of the topcoat.
To improve the above issues with putty, you can adjust the putty formula and add some redispersible latex powder to improve the later strength of the putty. Choose a high-quality hydroxypropyl methyl cellulose HPMC with quality assurance. Hydroxypropyl methyl cellulose has a water retention rate of high-quality cellulose, which can fully hydrate the putty raw material and improve the quality of the putty.
What will be the impact on putty powder if the amount of redispersible latex powder added during the putty production process is insufficient, or if inferior putty specific latex powder is used?
The insufficient amount of redispersible latex powder added to putty is the most direct manifestation of loose putty layer, surface powdering, high paint consumption when applying topcoat, poor leveling, rough surface after film formation, and difficulty in forming a dense paint film. Such walls are prone to peeling, blistering, peeling, and cracking of the paint film. If inferior putty powder is chosen, the degree of harm to people’s bodies caused by harmful gases such as formaldehyde generated on the wall is obvious.
To change the current situation, it is necessary to remove all inferior putty without leaving any residue, and then purchase qualified putty and latex paint! In order to avoid unnecessary losses, customers should try to choose products from large brands with quality assurance for the convenience of putty selection.
longou Company specializes in the production and sales of wood fibers, starch ether, hydroxypropyl methyl cellulose, redispersible latex powder
Post time: Sep-06-2023