Common types of methyl hydroxyethyl cellulose (HEMC) are mainly distinguished by their degree of substitution, viscosity, dissolution rate, and application areas. Different manufacturers may use slightly different names, but the core parameters are comparable. Below are some typical types widely used in industry:
Common HEMC Type Classifications and Characteristics:
LH Series (e.g., LH55, LH55RR)
Produced by manufacturers such as Shandong Xinrun, this is a low to medium viscosity type. A 2% aqueous solution has a viscosity of approximately 50-60 mPa·s, suitable for self-leveling mortars, tile adhesives, and other applications requiring high fluidity. It dissolves quickly and is suitable for rapid dispersion in cold water.
S Type (Surface-Treated)
After special surface modification treatment, it can disperse rapidly in cold water without agglomeration, but complete dissolution is slower. The pH needs to be adjusted to 8-10 to achieve rapid dissolution. It is suitable for high-end building material systems with stringent requirements for water retention and stability.
General-Purpose Type (HEMC-G)
Meets national standard general specifications, with a substitution degree MS = 0.3~0.4 and a 2% solution viscosity range of 80-120 mPa·s. Widely used in masonry mortar, putty powder, and water-based coatings, offering high cost-effectiveness and the largest market share.
High Water Retention Type (HEMC-HS)
Designed for high-temperature environments, achieving a mortar water retention rate of over 90% after 24 hours, significantly superior to ordinary MC products. Suitable for summer exterior wall plastering or construction in dry areas.
Oilfield Drilling Type (HEMC-O)
Possesses excellent salt resistance and high-temperature stability, maintaining stable viscosity even at 120℃ and high salinity environments. Used for thickening and water loss control in oil drilling fluids.
Food/pharmaceutical grade (HEMC-FP)
With a purity of over 99%, meeting GRAS and pharmacopoeia standards, used in oral sustained-release formulations, ice cream anti-melting agents, etc., to control ice crystal growth or achieve zero-level drug release.
