Do You Understand the Role of Starch Ether in Mortar ...
Do You Understand the Role of Starch Ether in Mortar ...
The Role of Starch Ether in the Mortar
ruyuan are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.
- Thicken the mortar, increase the sag resistance, sag resistance, and rheology of the mortar
For example, in the construction of tile adhesive, putty, and plastering mortar, especially now that mechanical spraying requires high fluidity, for example, it is imperative in a gypsum-based mortar (machine sprayed gypsum needs high fluidity but will cause severe sagging. Starch ether can make up for this defect).
Liquidity and sag resistance are often contradictory, and the increase in fluidity will bring about a decline in sag resistance. The mortar with rheological properties can well solve the contradiction that when an external force is applied, the viscosity will decrease, and the workability and pumpability will be enhanced. When the external force is withdrawn, the viscosity will increase and improve the sag resistance.
For the current trend of increasing tile area, adding starch ether can improve the tile adhesive slip resistance.
- Extend opentime
It can meet the requirements of special tile adhesives for tile adhesives with extended opening hours (Class E, extend from 20min to 30min to reach 0.5MPa).
- Improved surface properties
Starch ether can make the surface of gypsum-based and cement mortar smooth, easy to apply, and has an excellent decorative effect. It is significant for plastering mortars and thin-layer decorative mortars such as putty.
The Mechanism of Action of Starch Ether
Additional reading:How to Choose a Slurry Pump 101
Why Lost Foam?
7 Top Membrane Diffusers for Wastewater Treatment.
For more information, please visit starch ether manufacturer.
When starch ether is dissolved in water, it will be evenly dispersed in the cement mortar system. Because starch ether molecules have a network structure and are negatively charged, they will adsorb positively charged cement particles. As a transition bridge, the cement can be connected to give the slurry a more considerable yield value, improving the anti-sagging or anti-slip effect.
Hydroxypropyl Starch Ether
Hydroxypropyl Starch Ether
SE-301
Hydroxypropyl Starch Ether can impart unique properties to cement and gypsum based products. It has the similar chemical structure with Hydroxypropyl Methylcellulose(HPMC) that not only provide Hydroxypropyl Methylcellulose(HPMC)-like function, but also has good compatibility with other building additives. In combination with Hydroxypropyl Methylcellulose(HPMC), Hydroxypropyl Starch Ether can play a better thickening effect, with better crack resistance and improve workability. And by adding starch ether, the cost of the mortar formulation can be significantly reduced.
Item Standard Appearance White to yellow powder Moisture ≤10% pH 7.0~9.0（5% solution） Viscosity 500-1200mPa.s (5% solution) Solubility Soluble in waterThe properties of starch ether in dry mortar are as follows:
- Due to the special chemical structure of starch ether, Hydroxypropyl Starch Ether can effectively prevent the hanging phenomenon of thick layer of mortar, which has a good improvement effect on the sliding of the tile, the hanging of thick layer and other undesirable phenomenon;
- Adding appropriate amount of Hydroxypropyl Starch Ether in the mortar can delay the opening time of it. The water retention of starch ether can be kept stable with the increase of temperature. Therefore, the product can not only improve the water retention performance of the mortar, but also compensate the rapid retention of the water retention capacity of the ordinary water retention agent with the increase of the temperature;
- Hydroxypropyl Starch Ether has a fast thickening function for mortar, which can improve the rheology of spray mortar and plaster mortar;
- Hydroxypropyl Starch Ether can effectively prevent the stratification/segregation of the mortar, which can be well used in self-leveling mortar;
Hydroxypropyl starch ethers are added in the following materials:
- Inner and outer wall putty powder of various types(cement, gypsum base);
- Various types of(tile, stone) binders;
- All kinds of facing mortar and plaster mortar, especially the exterior wall insulation mortar.
The starch ether produced by Sidley Chemical can replace of AVEBE starch ether CASUCOL 301, it has excellent performance in mortar and can greatly reduce the cost.
If you want to learn more, please visit our website CAS 9049-76-7.