Application of hydroxypropyl methyl cellulose in building materials

1. Dosage of hydroxypropyl methylcellulose
Propyl Methyl Cellulose (HPMC) is a non-ionic cellulose ether made from a natural polymer material cellulose as a raw material through a series of chemical processes. Hydroxypropyl methylcellulose (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, adhesion, dispersion, emulsification, film formation, suspension, adsorption, gelation, surface activity, moisture retention and protective colloid.
2. What is the main purpose of HPMC?
HPMC is widely used in construction materials, coatings, synthetic resins, ceramics, medicine, food, textile, agriculture, cosmetics, tobacco and other industries. HPMC can be divided into: building grade, food grade and medicine grade according to usage. At present, most of the domestic production is construction grade. In the construction grade, the amount of putty powder is very large, about 90% is used for making putty powder, and the rest is used for cement mortar and glue.
3. The application of hydroxypropyl methyl cellulose in building materials
Mortar plastering mortar
High water retention can fully hydrate the cement. Significantly increase the bonding strength. At the same time, it can properly increase the tensile and tensile strength and shear strength. Greatly improve the construction effect and work efficiency.
2. Water resistant putty
The main function of cellulose ether in putty is to retain water, bond and lubricate, to avoid the phenomenon of cracking or de-powdering caused by excessive water loss, at the same time increase the adhesion of putty, reduce the sagging phenomenon during construction, and make the construction smoother. Effortless.
3. Interface agent
Mainly used as a thickening agent, it can improve the tensile strength and shear strength, improve the surface coating, enhance the adhesion and bonding strength.
4. External thermal insulation mortar
Cellulose ether plays a key role in bonding and increasing strength in this material, making the mortar easier to coat, improving work efficiency, and having anti-sagging ability. Higher water retention performance can extend the working time of the mortar, improve shrinkage resistance Crack resistance, improve surface quality and increase bonding strength.
5. Tile adhesive
The higher water retention does not need to pre-soak or wet tiles and substrates, which significantly improves its bonding strength. The slurry can be constructed for a long period, fine, uniform, easy to apply, and has good slip resistance.
6. Caulking agent
The addition of cellulose ether makes it have good edge adhesion, low shrinkage and high abrasion resistance, protect the base material from mechanical damage, and avoid the negative impact of water penetration on the entire building.
7. Self-leveling material
The stable viscosity of cellulose ether guarantees good fluidity and self-leveling ability, controlling the water retention rate to enable it to solidify quickly and reduce cracking and shrinkage.

Post time: May-29-2020