Cellulose ether is a cellulose derivative, because of its unique properties, has a wide range of uses. HPMC hydroxypropyl methyl cellulose and MHEC methyl hydroxyethyl cellulose are widely used in dry mortar industry, paint coatings, detergents and oil drilling.In China, the main raw material of cellulose ether is worsted cotton. The main production process includes: raw material preparation, alkalization, etherification, dissolubilization and post-treatment.
The water retention performance of cellulose ether (HPMC,MHEC) mainly comes from its own solubility and dehydration. Although the molecular chain of cellulose contains a large number of hydroxyl groups with strong hydration properties, it is insoluble in water because of the high crystallinity of the structure of cellulose. The hydration capacity of hydroxyl groups alone is not sufficient to break the strong intermolecular hydrogen bonds and van der Waals forces. So it just expands, it doesn't dissolve in water. When a substituent is introduced into a molecular chain, not only does the substituent break the hydrogen bond, but it also breaks the hydrogen bond between the chains due to the wedging of the substituent between the adjacent chains. The larger the substituents, the greater the distance between the molecules. The greater the effect of hydrogen bond breaking, the cellulose lattice expands, the solution enters, cellulose ether becomes water-soluble, forming a high viscosity solution.
The homogeneity, stability and workability of all fresh mortars are improved by use of cellulose ethers.For dry mortars we offer modified and non-modified Celopro® grades of both MHEC and MHPC.
In construction industry, these products are responsible for
● Water retention
● Consistency● Adhesion