Some common problems in cellulose application (2)

1. What is the main role of HPMC in Putty powder and whether chemistry occurs?

Answer: HPMC plays three roles in thickening, water retention and construction of Putty powder. Thickening: Cellulose can thicken to suspend, keep the solution uniform up and down, and resist flow hanging. Water retention: make Putty powder dry slowly and assist lime calcium to react under the action of water. Construction: cellulose has lubricating effect and can make Putty powder have good workability. HPMC does not participate in any chemical reaction, but only plays an auxiliary role.

2. HPMC is Nonionic cellulose ether, so what is Nonionic cellulose ether?

A: Generally speaking, nonions are substances that are not ionized in water. In other words, HPMC is placed in water and does not dissociate into charged ions, but exists in the form of molecules.

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

Answer: the gel temperature of HPMC is related to its methoxy content. The lower the methoxy content, the higher the gel temperature.

4. Is the powder loss of Putty powder related to HPMC?

Answer: The powder loss of Putty powder is mainly related to the quality of lime and calcium, but not to HPMC. The low calcium content of lime calcium and the inappropriate proportion of CaO and Ca (OH) 2 in lime calcium will cause powder loss. If it has something to do with HPMC, then if HPMC has poor water retention, it will also cause powder loss.