Views: 2 Author: Site Editor Publish Time: 2022-11-09 Origin: Site
Difference Between Hydroxyethyl Cellulose and Hydroxypropyl Methyl Cellulose
Hydroxyethyl cellulose (HEC) product introduction:
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. 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.
2. 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;
3. 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;
4. The water retention capacity is twice as high as that of methyl cellulose, and it has better flow regulation.
Uses: Generally used as thickening agent, protective agent, adhesive, stabilizer and additive for the preparation of emulsions, jellies, ointments, lotions, eye cleansers, suppositories and tablets, also used as hydrophilic gels, skeletons It can also be used as a stabilizer in food, etc.
Hydroxypropyl methylcellulose (HPMC) product introduction:
1. Construction industry: As a water-retaining agent and retarder for cement sand slurry, it makes the sand slurry pumpable. Used as a binder in plastering slurry, gypsum, putty powder or other building materials to improve spreadability and prolong operation time. It is used as a paste for ceramic tile, marble, plastic decoration, as a paste enhancer, and it can also reduce the amount of cement. The water retention of HPMC can prevent the slurry from cracking due to drying too fast after application, and enhance the strength after hardening.
2. Coating industry: As a thickener, dispersant and stabilizer in the coating industry, it has good compatibility in water or organic solvents. as a paint remover.
3. Ceramic manufacturing: widely used as a binder in the manufacture of ceramic products.
4. Ink printing: as a thickener, dispersant and stabilizer in the ink industry, it has good compatibility in water or organic solvents.
5. Polyvinyl chloride: It is used as a dispersant in the production of polyvinyl chloride, and it is the main auxiliary agent for the preparation of PVC by suspension polymerization.
6. Plastic: used as molding release agent, softener, lubricant, etc.
7. Others: This product is also widely used in leather, paper products, fruit and vegetable preservation and textile industries.
The application fields of hydroxypropyl methyl cellulose are more and more extensive, and the price of hydroxypropyl methyl cellulose is much cheaper than that of hydroxyethyl cellulose.