The key difference between HPMC and MHEC is that the gel temperature of HPMC is around 60 – 75°C, depending on the group content and different production techniques, whereas the gel temperature of MHEC is usually above 80°C.
The term HPMC stands for Hydroxypropyl Methylcellulose, whereas the term MHEC stands for Methyl Hydroxyethyl Cellulose. These two are important as construction chemicals that can be used as thickeners, retaining agents, and air getters. Mainly, they are used in dry mix mortars of cement and gypsum to improve bond strength, workability, and retain water levels.
