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A few questions about HPMC

June 27, 2022by admin

1. How to choose a suitable hydroxypropyl methylcellulose (HPMC) for different purposes?

The application of putty powder: the requirements are low, the viscosity is 100,000, it is enough, the important thing is to keep the water well. Application of mortar: high requirements, high viscosity, 150,000 is better. Application of glue: instant products are required with high viscosity.

2. HPMC is non-ionic cellulose ether, so what is non-ionic?

In layman’s terms, non-ions are substances that do not ionize in water. Ionization refers to the process by which an electrolyte is dissociated into free-moving charged ions in a specific solvent (such as water, alcohol). For example, the salt we eat every day, sodium chloride (NaCl), dissolves in water and ionizes to produce freely moving sodium ions (Na+) that are positively charged and chloride ions (Cl) that are negatively charged. That is, when HPMC is placed in water, it does not dissociate into charged ions, but exists in the form of molecules.

3. What is the gel temperature of hydroxypropyl methylcellulose related to?

The gel temperature of HPMC is related to its methoxy group content, the lower the methoxy group content↓, the higher the gel temperature↑



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