Cement Based Tile Adhesive Mortars Additives Redispersible Polymer Powder Vae/RdpMay 26th 2023
HPMC manufacturer-Temperature of hydroxypropyl methyl cellulose gel
Many users rarely pay attention to the problem of hydroxypropyl methyl cellulose gel temperature. Now, viscosity is generally used to distinguish hydroxypropyl methyl cellulose, but for some special environments and special industries, the viscosity of products is not enough. Here is a brief introduction of hydroxypropyl methyl cellulose gel temperature.
The content of methoxy group is directly related to the etherification degree of cellulose ether. The content of methoxy group can be adjusted by controlling the formula, reaction temperature and reaction time. At the same time, the degree of etherification affects the degree of substitution of hydroxyethyl or hydroxypropyl. Therefore, generally, the high gel temperature of cellulose ether water retention will be a little worse. This production process needs to be explored, so the price of cellulose ether is not low if the methoxy content is low. On the contrary, the price will be higher.
The gel temperature is determined by methoxy, and the water holding capacity is determined by hydroxypropyl. There are only three replaceable groups on cellulose. Find out your appropriate temperature and water retention, and then determine the type of cellulose.
Gel temperature is a critical point in the application of cellulose ether. When the ambient temperature exceeds the gel temperature, the cellulose ether will precipitate from water and lose its water retention. The cellulose ether gel temperature in the market can basically meet the needs of mortar environment (except for special environment). Personally, it is not necessary to pay special attention to the performance index of gel temperature when mortar is applied, the gel temperature is determined by methoxy group, and water retention is determined by hydroxypropyl group. The lower the methoxy content, the higher the gel temperature, the better the water retention and stability.
The content of hydroxypropyl cellulose hydroxypropyl group produced by SLEOCHEM is 25%. Gel temperature is a critical point in the application of cellulose ether. When the ambient temperature exceeds the gel temperature, the cellulose ether will precipitate from the water and lose its water holding capacity, while the bio ether cellulose gel temperature of 65 degrees can basically meet the requirements of mortar. For the needs of putty use environment (except special environment), if you purchase SLEOCHEM products, please inform in advance if you have special requirements.