Hydroxyethyl methyl cellulose (HEMC)





Hydroxyethyl methyl cellulose (HEMC) is prepared by introducing ethylene oxide substituent (MS0.3~0.4) into methyl cellulose (MC). Its salt resistance is better than that of unmodified polymer, and the gel temperature of HEMC is also higher than that of MC.

Shape retention: because the highly concentrated aqueous solution of the product has special viscoelastic properties compared with other polymer aqueous solutions, its addition has the ability to improve the shape of extruded ceramic products.

Water retention property: the product has the hydrophilicity and the high viscosity of its aqueous solution, which is a highly effective water retention agent.

Hydroxyethyl methyl cellulose (HEMC) is soluble in water and some organic solvents, and can be dissolved in cold water. Its maximum concentration only depends on viscosity. The solubility changes with viscosity. The lower the viscosity, the greater the solubility. Some products are soluble in binary organic solvents and organic solvent water systems.

Technical indicators:

Viscosity range 2500-3000,

Molecular weight range 90000~120000mPa. s,

The actual molecular weight is 100000

Product application: ◆ Cement based plastering mortar: 1. Improve uniformity, make plastering mortar easier to apply, and improve anti vertical flow capacity. Enhance mobility and pumpability to improve work efficiency. 2. It has high water retention, prolongs the working time of mortar, improves the working efficiency, and helps the mortar to form high mechanical strength during the solidification period. 3. Control the air infiltration, so as to eliminate the micro cracks of the coating and form an ideal smooth surface.

◆ Gypsum plastering mortar and gypsum products: 1. Improve the uniformity, make the plastering mortar easier to be coated, and improve the anti vertical flow ability to enhance the fluidity and pumpability, so as to improve the work efficiency. 2. It has high water retention, prolongs the working time of mortar, and produces high mechanical strength during solidification. 3. Form a high-quality surface coating by controlling the consistency of mortar.

◆ Masonry mortar: 1. Enhance the adhesion with the masonry surface, and enhance the water retention, so as to improve the strength of the mortar.

2. Improve the lubricity and plasticity to improve the construction performance. Use the "Baoquan Brand" cellulose ether reinforced mortar, which is easier to apply, saves time, and improves cost efficiency. 3. There are models with special high water retention, which are suitable for bricks with high water absorption.

◆ Plate joint filler: 1. Excellent water retention, which can prolong cooling time and improve work efficiency. High lubricity, making application easier and smoother. 2. Improve the shrinkage resistance and crack resistance, and improve the surface quality. 3. Provide a smooth and even texture, and make the bonding surface more cohesive.

◆ Ceramic tile adhesive: 1. Make the dry mixing ingredients easy to mix without producing lumps, thus saving working time. Because the application is faster and more effective, it can improve the constructability and reduce costs. 2. The tiling efficiency is improved by prolonging the cooling time. Provides excellent adhesion. 3. Specially developed models with high skid resistance are available.

◆ Self leveling floor material: 1. Provide viscosity, which can be used as anti precipitation additive. 2. Enhance mobility and pumpability, thereby improving the efficiency of flooring. 3. Control the water retention to greatly reduce cracking and shrinkage.

◆ Water based paint and paint remover: 1. The storage life is extended by preventing solid precipitation. It has excellent compatibility with other components and high biological stability. 2. The dissolution is fast without lumps, which is helpful to simplify the mixing process. Cold water dispersion type products can make mixing faster and more convenient without producing lumps. 3. Produce favorable flow characteristics, including low splash and good leveling, which can ensure excellent surface finish and prevent paint sagging. 4. Enhance the viscosity of water-based paint remover and organic solvent paint remover, so that the paint remover will not flow out of the workpiece surface.

◆ Extruded concrete plates: 1. Enhance the processability of extruded products, with high bonding strength and lubricity.

2. Improve the wet strength and adhesion after extrusion.

Salt resistance: the product is non-ionic cellulose ether and not a polyelectrolyte, so it is relatively stable in aqueous solution in the presence of metal salt or organic electrolyte, but excessive addition of electrolyte can cause gel and precipitation.

Surface activity: As the aqueous solution has the surface activity function, it can be used as colloid protector, emulsifier and dispersant.

Hot gel: when the product aqueous solution is heated to a certain temperature, it becomes opaque, and gel forms precipitation, but when it is cooled continuously, it returns to the original solution state. The temperature at which this gel and precipitation occurs mainly depends on their lubricants, suspending aids, protective colloids, emulsifiers, etc.

Metabolism: Metabolize inert and low odor and fragrance. Because they will not be metabolized and low odor and fragrance, they are widely used in food and medicine.

Mold resistance: It has good mold resistance and good viscosity stability during long-term storage.

PH stability: the viscosity of the product aqueous solution is almost not affected by acid or alkali, and the PH value is relatively stable in the range of 3.0-11.0.

Low ash content: since the product is non-ionic, it is effectively refined by washing with hot water during preparation, so its ash content is very low.

Shape retention: because the highly concentrated aqueous solution of the product has special viscoelastic properties compared with other polymer aqueous solutions, its addition has the ability to improve the shape of extruded ceramic products.

Water retention property: the product has the hydrophilicity and the high viscosity of its aqueous solution, which is a highly effective water retention agent.

Other characteristics: thickener, film-forming agent, adhesive, lubricant, suspending agent, protective colloid, emulsifier, etc.




Storage, transportation and packaging: Store indoors in a ventilated and dry place, and pay attention to moisture. Prevent rain and sun during transportation. 5kg/barrel.

Safety precautions: The product has the risk of dust explosion. When handling in large quantities or in bulk, be careful to avoid dust deposition and suspension in the air. Do not approach heat, sparks, flame and static electricity. Avoid methyl cellulose powder and contact with eyes. Wear filter mask and safety goggles during operation. When the product is wet, it is very slippery. The scattered methyl cellulose powder should be cleaned in time and anti-skid treatment should be done.