For people who have just come into contact with hydroxypropyl methyl cellulose, it is not clear which fields to use and what kind of hydroxyethyl methyl cellulose. Here is a brief introduction to some common sense used: 1. How about the viscosity of HPMC? Putty powder is usually 100,000, and mortar needs more than 150,000. Moreover, the most important role of HPMC is water retention, followed by thickening. In putty powder, only good water retention, low viscosity (about 70,000) is also possible. Of course, higher viscosity, relative water retention is better. When the viscosity exceeds 100,000, the effect of viscosity on water retention is not significant. 2. What are the primary technical objectives of HPMC? The content and viscosity of HPMC are the two goals that most users are concerned about. High hydroxypropyl content, water retention is usually better. Viscosity, water retention, relative (rather than affirmative) is better, and viscous, better used in cement mortar. 3. What are the main materials of HPMC? The main materials of HPMC are refined cotton, chloromethane and propylene oxide. In addition, tablet base, acid, toluene and isopropanol. 4. Is there any relationship between putty powder dropping and hydroxypropyl methyl cellulose? Putty powder dropping is mainly related to the quality of ash and calcium, but not to HPMC. Low calcium content of grey calcium and inappropriate CaO and Ca (OH) 2 share of grey calcium will form powder dropping. Assuming that HPMC has something to do with it, it is the poor water retention of HPMC, which will cause powder dropping. 5. What is the reason for the odor of HPMC? Hydroxypropyl methyl cellulose produced by solvent method is using toluene and isopropanol as solvents. Assuming that the washing is not very good, there will be some residual flavor. |
