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What is the difference between HPMC and HEC?

Released on May. 25, 2022

HPMC is hydroxypropyl methyl cellulose ether and HEC is hydroxyethyl cellulose ether.

 

Introduction of hydroxypropyl methyl cellulose (HPMC).

1. Construction industry: used as water retention agent and retarder for water and slurry slurry to make slurry pumping. In plaster, plaster, putty powder or other construction materials as a binder to improve the effect of smearing and extend the operating time. Used for pasting tile, marble, plastic decoration, paste enhancer, also can reduce the amount of cement. HPMC water retention properties so that the slurry will not crack after construction due to too fast drying, enhance the strength after hardening. 

2. Ceramic manufacturing: widely used as adhesives in the manufacture of ceramic products.

3. Coating industry: used as thickener, dispersant and stabilizer in coating industry, with good solubility in water or organic solvents. As paint stripper.

4. Ink printing: in the ink industry as a thickener, dispersant and stabilizer, good solubility in water or organic solvents.

5. Plastics: used as molding release agent, softener, lubricant, etc.

6. PVC: As the main auxiliary for PVC production dispersant, suspension polymerization preparation of PVC. 7、Other: The product is also widely used in leather, paper products industry, fruit and vegetable preservation and textile industry.

What is the difference between HPMC and HEC?cid=7

 

Hydroxyethyl cellulose (HEC) Introduction.

As a non-ionic surfactant, HEC hydroxyethyl cellulose has the following properties in addition to thickening, floating, up-floating, film formation, dispersion, water retention and protection of colloids.

 

1. HEC dissolves in hot or cold water and does not precipitate in heat or boiling, giving it a wide range of solubility and viscosity properties, and non-thermal gel.

2. its non-ionic type can coexist with a variety of other water-soluble polymers, surfactants, salts, and is an excellent colloidal thickener containing high concentrations of electrolyte solutions.

3. water retention capacity is twice as high as methyl cellulose, with good flow regulation ability. 

4. HEC dispersion ability compared with the recognized methyl cellulose, hydroxypropyl methyl cellulose dispersion ability is the worst, but the strongest colloidal protection ability.

 

Uses: Generally used as thickener, protectant, binder, stabilizer and additive for the preparation of emulsions, gels, ointments, lotions, eye cleansers, suppositories and tablets, also used as hydrophilic gels, skeletal materials, skeletal type retardant preparation, also used as a stabilizer in food.

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