Hydroxypropyl methylcellulose for wall spraying!
Hydroxypropyl methylcellulose for wall spraying!
Hydroxypropyl methylcellulose products for construction are widely used to improve the performance of hydraulic construction materials, such as cement and gypsum. In cement-based mortars, it improves water retention, prolongs correction and open times, and reduces sagging.
a. Water retention
Hydroxypropyl methylcellulose for construction prevents moisture from penetrating into the wall. An appropriate amount of water stays in the mortar, so that the cement has a longer time to hydrate. The water retention is proportional to the viscosity of the cellulose ether solution in the mortar. The higher the viscosity, the better the water retention. Once the water molecules increase, the water retention decreases. Because for the same amount of construction-specific hydroxypropyl methylcellulose solution, an increase in water means a decrease in viscosity. The improvement of water retention will lead to the extension of the curing time of the mortar being constructed.
b. Improve construction
The application of hydroxypropyl methylcellulose HPMC can improve the construction of mortar.
c. Lubricating ability
All air-entraining agents act as wetting agents by lowering surface tension and helping the fines in the mortar to disperse when mixed with water.
d. Anti-sagging
A good sag-resistant mortar means that when applied in thick layers there is no danger of sag or downward flow. Sag resistance can be improved by construction-specific hydroxypropyl methylcellulose. The construction-specific hydroxypropyl methylcellulose produced by Shandong Chuangyao Company can provide better anti-sagging properties of mortar.
e. Bubble content
High air bubble content results in better mortar yield and workability, reducing crack formation. It also lowers the intensity value, causing a “liquefaction” phenomenon. Air bubble content usually depends on stirring time.
Advantages of hydroxypropyl methylcellulose in building material construction:
Hydroxypropyl methylcellulose has its unique properties in the application of building materials, from mixing to dispersion to construction, as follows:
Composite and configuration:
1. It is easy to mix with dry powder formula.
2. It has the characteristics of cold water dispersion.
3. Suspend solid particles effectively, making the mixture smoother and more uniform.
Dispersion and mixing:
1. The dry blend formula containing hydroxypropyl methylcellulose can be easily mixed with water.
2. Quickly obtain the desired consistency.
3. The dissolution of cellulose ether is faster and without lumps.
Online construction:
1. Improve lubricity and plasticity to enhance machinability and make product construction more convenient and faster.
2. Enhance the water retention characteristics and prolong the working time.
3. Helps prevent the vertical flow of mortar, mortar and tiles. Prolong the cooling time and improve work efficiency.
Finished performance and appearance:
1. Improve the bonding strength of tile adhesives.
2. Enhance the anti-crack shrinkage and anti-cracking strength of mortar and board joint filler.
3. Improve the air content in the mortar and greatly reduce the possibility of cracks.
4. Improve the appearance of finished products.
5. It can enhance the vertical flow resistance of tile adhesives.
Hydroxypropyl methylcellulose (HPMC) is a non-ionic cellulose ether made from pure cotton through a series of chemical processes. Hydroxypropylmethylcellulose (HPMC) is an odorless, tasteless, non-toxic white powder that can be dissolved in cold water to form a transparent viscous solution. It has the properties of thickening, binding, dispersing, emulsifying, film-forming, suspending, adsorbing, gelling, surface active, maintaining moisture and protecting colloid.
