Hydroxyethyl cellulose (HEC) is a white or pale yellow, tasteless, non-toxic fibrous or powdered solid. Prepared by alkaline cellulose and ethylene oxide (or chloroethanol) by etherification reaction. Is a non-ionic soluble cellulose ethers. Because of its excellent thickening, suspension, construction, medicine, food, textile, paper making and polymer polymerization reaction. HEC has been widely used in oil exploitation, coatings, construction, emulsification and bonding, film formation, water protection and protective colloid protection.
As a hydroxyethyl cellulose, it has the following properties besides thickening, suspension, adhesion, floating, film, formation, dispersion, water retention and providing protective colloids:
1. HEC is soluble in hot water or cold water, high temperature or boiling without precipitation. So that it has a wide range of soluble and viscosity characteristics, and non-thermal gel;
2. Its own non-ionic type can coexist with other water-soluble polymers in a large range, surfactants and salts. And it is an excellent colloidal thickener containing a high concentration of electrolyte solution;
3. The water retention capacity is twice higher than that of methyl cellulose, and it has good flow regulation.
4. The dispersion ability of HEC is the least possible compare with the recognized methylcellulose and hydroxypropyl methylcellulose, but it has the strongest ability to protect the colloids.
Hydroxyethyl cellulose was used method
Added directly during production. Add water to large drums with high shstirmixer. Start to stir at a low speed and slowly evenly sieve the hydroxyethyl cellulose into the solution. Continue stirring until all the particles . Then add lightning protection agent, alkaline additives such as pigments, dispersing additives, ammonia water. Stir until all the hydroxyethyl cellulose is completely dissolve (the viscosity of the solution increases significantly) before adding the other components in the formula and grind until formed.