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HPMC  advantages and application

External thermal insulation system-choosing an appropriate amount of HPMC can maximize the bonding strength and smooth construction of the bonding mortar, and improve work efficiency.

Tile adhesive-HPMC’s good water retention, enhanced adhesion,

The viscosity of HPMC is inversely proportional to temperature, that is, the viscosity increases as the temperature decreases. We usually say that the viscosity of a product refers to the result of testing its 2% aqueous solution at a temperature of 20 degrees Celsius.

Instant HPMC disperses quickly in cold water and disappears in the water. At this time, the liquid has no viscosity, because HPMC is only dispersed in water without real dissolution. In about 2 minutes, the viscosity of the liquid gradually increased, forming a transparent viscous colloid.

1. The pure HPMC is in a fluffy visual state, with a small bulk density, ranging from 0.3-0.4g/ml; adulterated HPMC has better fluidity and feels heavier, which is obviously different from the original appearance.

2. The aqueous solution is clear and has high light transmittance, and the water retention rate is ≥97%; the adulterated HPMC water solution is turbid, and the water retention rate is difficult to reach 80%.

Cellulose ether HPMC will prolong the setting time of cement paste or mortar and delay the hydration kinetics of cement, which is beneficial to increase the operation time of cement-based materials, improve the consistency of mortar and the loss of concrete slump over time, but it is also possible It will delay the construction progress, especially the mortar and concrete used in low temperature environment.

Hydroxypropyl methylcellulose HPMC cold water (instant type): It is surface treated with glyoxal and quickly dispersed in cold water, but it is not really dissolved, the viscosity comes up, and the aqueous solution becomes clear and transparent. Really dissolved.

Extract 2.0g of hydroxypropyl methylcellulose HPMC sample dried to constant weight into a beaker, add 98ml of 80~90℃ hot water to make a 2.0% (g/g) solution, stir for about 20min, then put in ice Cool in the bath for 50min, continue to mix during the cooling process, remove air bubbles,

Hydroxypropyl methyl cellulose HPMC is one of the most commonly used additives in dry mortar. Cellulose ether plays an important role in dry mortar. After the cellulose ether in the mortar is dissolved in water, it guarantees gelation due to surface activity.