The advanges of HPMC & MHEC in dry mix mortar products
November 22nd 2024
Redispersible polymer powder is a water-soluble re-dispersible powder. This powder can be quickly re-dispersed into an emulsion after contact with water. Due to the high bonding capacity and unique properties of redispersible polymer powder, such as water resistance, constructability and thermal insulation, they have a wide range of applications. So how can we identify the quality of redispersible polymer powder?
Film method: take 100g of redispersible polymer powder dissolved in 100ml of water, after 2 minutes of full mixing, stir again, pour the solution on a piece of flat clean glass, glass placed in a ventilated shaded place. After sufficient drying, remove it. Observe the removed polymer film, the higher the transparency, the better the quality. Then pull the film moderately, the better the elasticity, the better the quality. Then cut the film into strips, immersed in water, 1 day later to observe, the less dissolved by water, the better the quality.
Dissolution method: take a certain quality of redispersible polymer powder for full mixing, quietly observed for 5 minutes, in principle, the less insoluble matter precipitated to the bottom layer, the better the quality of redispersible polymer powder, this method is simple and easy to implement.
Ash method, take a certain quality of redispersible polymer powder weighed and placed in a metal container, warmed to about 500 degrees, after 500 degrees of high temperature burning, cooled to room temperature, weighing again. The lighter the weight, the better the quality.
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