The difference between hydroxypropyl methyl cellulose and hydroxyethyl cellulose
Hydroxypropyl methyl cellulose (HPMC)
Application:
1. Construction industry: as the water retaining agent and setting retarding agent of water and sediment slurry, the sand slurry has pumping property.Be in plaster mortar, gesso makings, be putty pink or other building materials serves as adhesive, improve daub sex and lengthen can operate time.Used as paste ceramic tile, marble, plastic decoration, paste reinforcement, can also reduce the amount of cement.HPMC's water retention performance makes the paste will not crack due to drying too fast after coating, and enhance the strength after hardening.
2. Ceramic manufacturing industry: widely used as adhesive in ceramic products manufacturing.
3, coating industry: in the coating industry as thickener, dispersant and stabilizer, in water or organic solvents have good compatibility.As paint remover.
4, ink printing: in the ink industry as thickener, dispersant and stabilizer, in water or organic solvents have good compatibility.
5, plastic: for forming mold release agent, softener, lubricant, etc.
6, polyvinyl chloride: polyvinyl chloride production as dispersant, is the main additive suspension polymerization preparation of PVC.
7, others: this product is also widely used in leather, paper products, fruits and vegetables fresh and textile industry
Hydroxyethyl cellulose (HEC)
Hydroxyethyl cellulose, as a non-ionic surfactant, has the following properties in addition to thickening, suspension, adhesion, floatation, film formation, dispersion, water retention and protection of colloidal effects:
1, HEC can be dissolved in hot or cold water, high temperature or boiling without precipitation, so it has a wide range of solubility and viscosity properties, and non-thermal gelatability;
2, itself non-ionic can coexist with a wide range of other water-soluble polymers, surfactants, salts, is an excellent colloidal thickener containing high concentration of electrolyte solution;
3, water retention capacity is twice higher than methyl cellulose, with better flow regulation,
4. Compared with recognized methyl cellulose and hydroxypropyl methyl cellulose, the dispersion ability of HEC is the worst, but the protective colloid ability is the strongest.
USES: generally used as thickener, protectant, adhesive, stabilizer and additive for preparing emulsions, gels, ointments, lotions, eye cleansers, suppository and tablet, also used as hydrophilic gels, framework materials, preparation of framework type slow-release preparations, and also used as stabilizer in food.
