Hydroxyethyl cellulose
Hydroxyethyl cellulose
Firstly hydroxyethyl cellulose (HEC) is a white or light yellow, odorless, non-toxic fibrous or powdery solid. It is prepared by etherification of alkaline cellulose and ethylene oxide (or chlorohydrin). Nonionic soluble cellulose ethers.
Because HEC has good properties of thickening, suspending, dispersing, emulsifying, bonding, film forming, protecting moisture and providing protective colloids, it has been widely used in petroleum exploitation, coatings, construction, pharmaceutical, textile, paper and polymer. Fields such as polymerization. 40 mesh screening rate ≥99%;
Basic Information
Chinese name: Hydroxyethyl cellulose
Chinese synonym:including 2-hydroxyethyl ether cellulose; 2-hydroxyethyl cellulose; hydrogen oxyethyl cellulose; cellulose hydroxyethyl ether
English name: HEC（Hydroxyethyl Cellulose）
English synonym:Hydroxyethyl cellulose ether; Hydroxyethyl ether cellulose; Natrosol、Natrosol 240JR、 Natrosol 250 H、Natrosol 250 HHR、 Natrosol 250 M、Natrosol L 250、 Natrosol LR
CAS: 9004-62-0
MDL: MFCD00072770
InChI: 1S/C4H10O2S2/c5-1-3-7-8-4-2-6/h5-6H, 1-4H2
Common classification:
Chemicals>Carbohydrates>Cellulose; Fine Chemicals>Coating Aids>Coating Thickeners;Fine Chemicals>Food Additives>Thickeners
Physical and chemical properties
9004-62-0 structural formula
Molecular formula: C2H6O2·x
Melting point: 288-290 ° C (dec.)
Density: 0.75 g/mL at 25 ° C (lit.)
Softening temperature: 135-140 ° C
Performance density: 0.35-0.61g/ml
Decomposition temperature: 205-210 ° C; so slow burning rate
Equilibrium temperature: 23 ° C; 6% at 50% rh, 29% at 84% rh.
Appearance: This product is white to light yellow fibrous or powdery solid, non-toxic, tasteless
Solubility: H2O: ≤ 5 wt. % at 20 ° C soluble in water. so do not dissolve in common organic solvents. It has the properties of thickening, suspending, bonding, emulsifying, dispersing, and retaining moisture. Solutions of different viscosity ranges can be prepared. It has an exceptionally good salt solubility to the electrolyte.
Form:powder
Merck: 4673
Appearance traits: white to light yellow fibrous or powdery solid, non-toxic, odorless, soluble in water.Meanwhile do not dissolve in common organic solvents.
Hydroxyethyl cellulose
The pH value changes little in the range of 2-12, but the viscosity decreases beyond this range. It has the properties of thickening, suspending, bonding, emulsifying, dispersing, retaining moisture and protecting colloids. Solutions of different viscosity ranges can be prepared.So it is unstable under normal temperature and pressure, avoids humidity, heat, high temperature, and has excellent salt solubility to the dielectric. The aqueous solution is allowed to contain a high concentration of salts and is stable.
Application field
Similarly used as an adhesive, surfactant, colloidal protective agent, dispersant, emulsifier and dispersion stabilizer. For example it has a wide range of applications in the fields of coatings, inks, fibers, dyeing, paper, cosmetics, pesticides, mineral processing, oil recovery and medicine.
（1）
Generally used as thickeners, protective agents, adhesives, stabilizers and additives for the preparation of emulsions, gels, ointments, lotions, eye drops, suppositories and tablets, also used as a hydrophilic gel, skeleton The material and the preparation of the skeleton type sustained-release preparation can also be used as a stabilizer for foods.
（2）
For example adhesives for thickening, thickening, emulsifying and stabilizing in the sizing agent, electronics and light industry sectors of the textile industry.
（3）
It is used as a thickener and fluid loss additive for water-based drilling fluids and completion fluids, and has a thickening effect in brine drilling fluids. that can also be used as a fluid loss additive for oil well cement. It can be crosslinked with polyvalent metal ions to form a gel.
（4）
This product is use in the fracturing method to extract petroleum water-based gel fracturing fluid, meanwhile polystyrene and polyvinyl chloride and other polymeric dispersing agents. It can also be used as a latex polymer thickener in the paint industry, a moisture sensitive resistor in the electronics industry, a cement retarder and a moisture retaining agent in the construction industry. Ceramic industry glazing and toothpaste adhesives. Also widely used in printing and dyeing, textile, paper, medicine, health, food, cigarettes, pesticides and fire extinguishing agents.
（5）
As a surfactant, colloidal protective agent, emulsion stabilizer for the combination of vinyl chloride, vinyl acetate and other emulsions, as well as tackifiers, dispersants, dispersion stabilizers of latex. Widely used in coatings, fiber, dyeing, paper, cosmetics, medicine, pesticides, etc. There are also many uses in the oil extraction and machinery industries.
（6）
Similarly Hydroxyethyl cellulose has surface activity, thickening, suspension, adhesion, emulsification, film formation, dispersion, water retention and protection in pharmaceutical solid and liquid preparations.
（7）
A dispersing agent for the polymerization of petroleum water-based gel fracturing fluid, polyvinyl chloride and polystyrene. It can also use as a latex thickener in the paint industry, as a cement retarder and moisture retainer in the construction industry, as a glazing agent in the ceramic industry and as a toothpaste adhesive. Also widely used in printing and dyeing, textile, paper, medicine, health, food, cigarettes and pesticides and other industrial fields.