This material is a special high molecular polymer powder made after spray drying. After the powder comes into contact with water, it can become an emulsion again, and has the same properties as emulsion. After the water evaporates, it can form a film. The film has high flexibility, high weather resistance, and high adhesion to various base layers.
Therefore, Redispersible polymer powder is an indispensable raw material in dry-mixed mortar, which can improve performance and strength, improve the bonding of dry-mix mortar with various substrates, and improve the flexibility, compressive strength, and abrasion resistance of dry-mix mortar. In addition, If mixed with water-repellent latex powder, it can make dry-mix mortar waterproof.
Cellulose ether, the raw material is high purity cotton, after alkali treatment and special etherification becomes Cellulose ether.
Cellulose ether plays a role of thickening, water retaining, improve workability, improve mortar bonding.
Cellulose ether with different viscosity has different uses. Cellulose ether are chemically stable, can prevent mildew, have good water retention effect, and are not affected by changes in PH value. The viscosity can be used from 400 to 200,000mPas. Mainly to increase the leveling and construction properties of dry mortar, and appropriately reduce the amount of cement.
In addition, cement mortar has a solidification period, during which it needs artificial curing to keep it moist. Due to the water retention of cellulose, the water required for mortar coagulation can be obtained from the water retention of cellulose ether, so it can be coagulated without special maintenance.
The role of Cellulose fiber in dry mortar is to control shrinkage, resist cracking. When Cellulose fiber is dispersed in water, it is in the form of short fibers. For example, when building walls with soil in China, wheat straw and rice straw are added to resist cracking. When using Cellulose fiber, it is best to choose pure materials without impurities. When identifying Cellulose fiber, you can turn the Cellulose fiber to see if there is any dust left. The more the powder, the worse the quality. Or put a little Cellulose fiber into the water to observe, the better the dispersibility, the better the quality, which shows that if it is added to dry mortar, it is also easy to disperse and will not form a mass.
1.Starch ether is usually used in combination with HPMC, which shows a good synergistic effect between the two. Adding an appropriate amount of starch ether into HPMC can significantly improve the anti-sag and anti-slip properties of mortar, with a high yield value.
2.In the mortar containing HPMC, adding an appropriate amount of starch ether can significantly increase the consistency of the mortar, improve the flow performance, and make the construction smoother and scraping smoother.
3.In the mortar containing HPMC, adding an appropriate amount of starch ether can increase the water retention of the mortar and extend the opening time.
4.Starch ether is a chemical modified starch ether soluble in water, compatible with other additives in dry mortar, widely used in ceramic tile adhesive, repair mortar, plaster, internal and external wall putty, gypsum base caulking and filling materials, interface agent, masonry mortar. The characteristics of starch ether mainly lie in: Anti-sagging; Improve workability, operating more smoothly; Extend opening time.
Post time: Jun-15-2021