In ready-mixed mortar, the added amount of cellulose ether added is very low. But it can significantly improve the performance of wet mortar, which is affecting the performance of mortar construction the main additive. Reasonable selection of different varieties, different viscosity, different particle size, different viscosity degree and added amount of cellulose ether. To produce and play a positive impact on the improvement of dry powder mortar performance.
At present, many masonry and plastering mortar water retention performance is not good.
A few minutes will appear water slurry separation. Water retention is an important performance of cellulose ether, but also many domestic dry mortar manufacturers. Especially in the southern high temperature area manufacturers concerned about the performance. The factors affecting the water retention effect of dry powder mortar include the amount of cellulose added, viscosity, particle fineness and the temperature of the use environment.
The properties of cellulose ethers depend on the species, number, and distribution of the substituents. The classification of cellulose ether is also classified according to the type of substituents, etherification degree, dissolution performance and related applied energy. According to the type of substituent on the molecular chain, it can be into single ether and mixed ether. Our usual MC is single ether, and HPMC is ether. Methyl cellulose ether MC is the product of [C O H7O2 (OH) 3-h (OCH3) H] x, HPMC is part of the hydroxyl group on the unit is replaced by methxy group, and [C6H7O2 (OH) 3-m-n m (OCH3) m [OCH2CH (OH) CH3] n] x HEMC, which is widely used and sold in the market.
From the dissolution performance can be into ionic type and non-ionic type. Water-soluble non-ionic cellulose ether is mainly of two series of alkyl ether and hydroxyalkyl ether. Ionic CMC is mainly used in synthetic detergent, textile, printing and dyeing food and petroleum exploitation. And non-ionic MC, HPMC, HEMC and so on are mainly in building materials, latex coatings, medicine, daily chemistry and other aspects. Use as thickener, water retaining agent, stabilizer, dispersant and film forming agent.