Hydroxyethyl cellulose (HEC) is a white or light yellow, odorless, non-toxic fibrous or powdery solid, which is prepared by etherification reaction of alkaline cellulose and ethylene oxide (or chlorohydrin). Nonionic soluble cellulose ethers. Since HEC has good properties of thickening, suspending, dispersing, emulsifying, bonding, film-forming, protecting moisture and providing protective colloid, it has been widely used in oil exploration, coatings, construction, medicine, food, textile, papermaking and polymer Polymerization and other fields. 40 mesh sieving rate ≥ 99%;
Appearance: white to light yellow fibrous or powdery solid, non-toxic, tasteless, soluble in water. Insoluble in common organic solvents.
Hydroxyethyl cellulose thickener
The viscosity changes slightly in the range of PH value 2-12, but the viscosity decreases beyond this range. It has the properties of thickening, suspending, binding, emulsifying, dispersing, maintaining moisture and protecting colloid. Solutions in different viscosity ranges can be prepared. Unstable under normal temperature and pressure, avoid humidity, heat, and high temperature, and have exceptionally good salt solubility for dielectrics, and its aqueous solution allows high concentrations of salts to remain stable
Important properties:
As a non-ionic surfactant, hydroxyethyl cellulose has the following properties in addition to thickening, suspending, binding, floating, film-forming, dispersing, water retention and providing protective colloid:
1. HEC is soluble in hot water or cold water, and does not precipitate at high temperature or boiling, so that it has a wide range of solubility and viscosity characteristics, and non-thermal gelation;
2. It is non-ionic and can coexist with a wide range of other water-soluble polymers, surfactants, and salts. It is an excellent colloidal thickener for high-concentration electrolyte solutions;
3. The water retention capacity is twice as high as that of methyl cellulose, and it has better flow regulation.
4. Compared with the recognized methyl cellulose and hydroxypropyl methyl cellulose, the dispersing ability of HEC is the worst, but the protective colloid ability is the strongest.
Application field
Used as adhesive, surfactant, colloidal protective agent, dispersant, emulsifier and dispersion stabilizer, etc. It has a wide range of applications in the fields of coatings, inks, fibers, dyeing, papermaking, cosmetics, pesticides, mineral processing, oil extraction and medicine.
1. It is generally used as a thickener, protective agent, adhesive, stabilizer, and additive for the preparation of emulsions, jellies, ointments, lotions, eye cleaners, suppositories, and tablets. It is also used as a hydrophilic gel and skeleton Materials, preparation of matrix-type sustained-release preparations, and can also be used as a stabilizer in food.
2. Used as a sizing agent in the textile industry, and as an auxiliary agent for bonding, thickening, emulsifying, and stabilizing in the electronics and light industry sectors.
3. It is used as thickener and fluid loss reducer for water-based drilling fluid and completion fluid, and the thickening effect is obvious in brine drilling fluid. It can also be used as fluid loss reducer for oil well cement. It can be cross-linked with polyvalent metal ions to form a gel.
4. This product is used as a dispersant for the polymerization of petroleum water-based gel fracturing fluid, polystyrene and polyvinyl chloride, etc. by fracturing. It can also be used as an emulsion thickener in the paint industry, a hygrostat in the electronics industry, a cement anticoagulant and a moisture retention agent in the construction industry. Ceramic industry glazing and toothpaste binder. It is also widely used in printing and dyeing, textiles, papermaking, medicine, hygiene, food, cigarettes, pesticides and fire extinguishing agents.
5. As surfactant, colloidal protective agent, emulsification stabilizer for vinyl chloride, vinyl acetate and other emulsions, as well as latex tackifier, dispersant, dispersion stabilizer, etc. Widely used in coatings, fibers, dyeing, papermaking, cosmetics, medicine, pesticides, etc. It also has many uses in oil exploration and machinery industry.
6. Hydroxyethyl cellulose has surface active, thickening, suspending, binding, emulsifying, film-forming, dispersing, water-retaining and protective functions in pharmaceutical solid and liquid preparations.
7. It is used as a polymeric dispersant for exploiting petroleum water-based gel fracturing fluid, polyvinyl chloride and polystyrene. It can also be used as an emulsion thickener in the paint industry, a cement anticoagulant and moisture retaining agent in the construction industry, a glazing agent and a toothpaste adhesive in the ceramic industry. It is also widely used in industrial fields such as printing and dyeing, textiles, papermaking, medicine, hygiene, food, cigarettes and pesticides.
Product Performance
1. HEC is soluble in hot water or cold water, and does not precipitate at high temperature or boiling, so that it has a wide range of solubility and viscosity characteristics, and non-thermal gelation;
2. It is non-ionic and can coexist with other water-soluble polymers, surfactants and salts in a wide range. It is an excellent colloidal thickener for solutions containing high-concentration dielectrics;
3. The water retention capacity is twice as high as that of methyl cellulose, and it has better flow regulation;
4. Compared with the recognized methyl cellulose and hydroxypropyl methyl cellulose, the dispersing ability of HEC is the worst, but the protective colloid ability is the strongest.
How to use HEC？
added directly at production time
1. Add clean water to a large bucket equipped with a high shear mixer.
2. Start to stir continuously at low speed and slowly sieve the hydroxyethyl cellulose into the solution evenly.
3. Continue stirring until all particles are soaked.
4. Then add antifungal agent, alkaline additives such as pigments, dispersing aids, ammonia water.
5. Stir until all the hydroxyethyl cellulose is completely dissolved (the viscosity of the solution increases significantly) before adding other components in the formula, and grind until the finished product.
Post time: Dec-29-2022