Hydroxyethyl cellulose (HEC) is a white or light yellow, odorless, non-toxic fibrous or powdery solid prepared by etherification of alkaline cellulose and ethylene oxide (or chlorohydrin). Nonionic soluble cellulose ethers. Because HEC has good properties such as thickening, suspending, dispersing, emulsifying, bonding, film-forming, protecting moisture and providing protective colloids, it has been widely used in skin care ,oil exploration, coatings, construction, medicine and food, textiles, papermaking and polymers. Polymerization and other fields. 40 mesh sieving rate ≥ 99%;
Appearance properties: white to light yellow fibrous or powdery solid, non-toxic, odorless, easily soluble in water. Insoluble in general organic solvents.
Hydroxyethyl cellulose
In the range of PH value of 2-12, the viscosity change is small, but the viscosity decreases beyond this range. It has the properties of thickening, suspending, bonding, emulsifying, dispersing, retaining moisture and protecting colloid. Solutions of different viscosity ranges can be prepared. It is unstable under normal temperature and pressure, avoiding humidity, heat and high temperature, and has exceptionally good salt solubility for dielectrics, and its aqueous solution is allowed to contain high concentrations of salts and is stable
Important properties: As a non-ionic surfactant, hydroxyethyl cellulose has the following properties in addition to thickening, suspending, binding, flotation, film-forming, dispersing, water retention and providing protective colloids:
1. HEC is soluble in hot or cold water, and does not precipitate at high temperature or boiling, making it have 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, and is an excellent colloidal thickener containing 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 has the strongest ability.
Application area folding
Used as adhesive, surfactant, colloid protective agent, dispersant, emulsifier and dispersion stabilizer. It has a wide range of applications in coatings, inks, fibers, dyeing, papermaking, cosmetics, pesticides, mineral processing, oil extraction and medicine.
1. Generally used as thickening agent, protective agent, adhesive, stabilizer and additive for preparing emulsion, gel, ointment, lotion, eye clearing agent, suppository and tablet, also used as hydrophilic gel, skeleton materials, preparation of skeleton sustained-release preparations, and can also be used as a stabilizer in food.
2. It is used as sizing agent in textile industry, bonding, thickening, emulsifying, stabilizing and other auxiliaries in electronics and light industry sectors.
3. Used as thickener and filtrate reducer for water-based drilling fluid and completion fluid, and has obvious thickening effect in saltwater drilling fluid. It can also be used as a fluid loss control agent for oil well cement. It can be cross-linked with polyvalent metal ions to form gels.
4. This product is used as a dispersant for water-based gel fracturing fluids, polystyrene and polyvinyl chloride in oil fracturing production. It can also be used as emulsion thickener in paint industry, humidity sensitive resistor in electronic industry, cement coagulation inhibitor and moisture retaining agent in construction industry. Glazing and toothpaste adhesives for the ceramic industry. It is also widely used in printing and dyeing, textile, papermaking, medicine, hygiene, food, cigarettes, pesticides and fire extinguishing agents.
5. Used as surfactant, colloid protective agent, emulsion 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 extraction and machinery industry.
6. Hydroxyethyl cellulose has surface activity, thickening, suspending, binding, emulsifying, film-forming, dispersing, water retention and providing protection in pharmaceutical solid and liquid preparations.
7. It is used as a dispersant for the exploitation of petroleum water-based gel fracturing fluid, polyvinyl chloride and polystyrene. It can also be used as emulsion thickener in paint industry, cement coagulation inhibitor and moisture retention agent in construction industry, glazing agent and toothpaste adhesive in ceramic industry. It is also widely used in printing and dyeing, textile, papermaking, medicine, hygiene, food, cigarettes and pesticides and other industrial fields.
Product performance folding
1. HEC is soluble in hot 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. The non-ionic itself can coexist with a wide range of other water-soluble polymers, surfactants and salts, and is an excellent colloidal thickener containing high-concentration dielectric 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 has the strongest ability.
How to fold
Join directly in production
1. Add clean water to a large bucket equipped with a high-shear mixer.
2. Start stirring continuously at low speed and slowly sieve the hydroxyethyl cellulose into the solution evenly.
3. Continue stirring until all particles are soaked through.
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.
The role of hydroxyethyl cellulose in the chemical composition of cosmetics? The water-soluble polymer compounds used in cosmetics are mainly divided into two categories: natural and synthetic.
Natural water-soluble polymer compounds include: starch, plant gum, animal gelatin, etc., but the quality is unstable, easily affected by climate, geographical environment, limited yield, and easily deteriorated by bacteria and mold.
Synthetic water-soluble polymer compounds include polyvinyl alcohol, polyvinylpyrrolidone, etc., which have stable properties, low skin irritation and low price, so they have replaced natural water-soluble polymer compounds and become the main source of colloid raw materials.
It is further divided into semi-synthetic and synthetic water-soluble polymer compounds.
Semi-synthetic water-soluble polymer compounds are often used: methyl cellulose, ethyl cellulose, sodium carboxymethyl cellulose, hydroxyethyl cellulose, and guar gum and its derivatives.
Synthetic water-soluble polymer compounds are commonly used: polyvinyl alcohol, polyvinylpyrrolidone, acrylic acid polymer, etc.
These are used in cosmetics as adhesives, thickeners, film formers, and emulsion stabilizers.
Post time: Nov-11-2022