The main uses and differences of hydroxypropyl methylcellulose HPMC and hydroxyethyl cellulose HEC
Carboxymethyl cellulose, hydroxypropyl methyl cellulose, and hydroxyethyl cellulose with industrial monosodium glutamate are used in the largest amount. The most difficult to distinguish among these three types of cellulose is hydroxypropyl methylcellulose and hydroxyethyl cellulose. Below we will distinguish these two types of cellulose through their use and function.
As a non-ionic surfactant, hydroxyethyl cellulose has the following properties in addition to the functions of suspending, thickening, dispersing, floating, bonding, film forming, water retention and providing protective colloid:
1. HEC itself 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 solutions containing high-concentration electrolytes.
2. 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.
3. The water retention capacity is twice as high as that of methyl cellulose, and it has better flow regulation.
4. HEC is soluble in hot water or cold water, and does not precipitate at high temperature or boiling, which makes it have a wide range of solubility and viscosity characteristics, and non-thermal gelation.
HEC use: generally used as a thickener, protective agent, adhesive, stabilizer and preparation of emulsion, jelly, ointment, lotion, eye clear.
Hydroxypropyl methylcellulose (HPMC) application introduction:
1. Coating industry: It is used as a thickener, dispersant and stabilizer in the coating industry, and has good compatibility in water or organic solvents. As a paint remover.
2. Ceramic manufacturing industry: It is widely used as a binder in the manufacture of ceramic products.
3. Others: This product is also widely used in leather, paper products, fruit and vegetable preservation and textile industries, etc.
4. Ink printing: It is used as a thickener, dispersant and stabilizer in the ink industry, and has good compatibility in water or organic solvents.
5. Plastic: used as forming release agent, softener, lubricant, etc.
6. Polyvinyl chloride: It is used as a dispersant in the production of polyvinyl chloride, and it is the main auxiliary agent for preparing PVC by suspension polymerization. the
7. Construction industry: As a water-retaining agent and retarder of cement sand slurry, it can make the mortar pumpable. In plaster, gypsum, putty powder or other building materials as a binder to improve spreadability and prolong work time. It can be used as paste tile, marble, plastic decoration, paste reinforcement, and can also reduce the amount of cement. The water-retaining performance of HPMC prevents the slurry from cracking due to drying too quickly after application, and enhances the strength after hardening.