What important role does hydroxypropyl methylcellulose have?
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Author : Ada
Update time : 2023-02-12 18:32:40
What is hydroxypropyl methylcellulose? Hydroxypropyl methylcellulose, also known as Hypromellose, is one of the non-ionic cellulose mixed ethers. It is a semi-synthetic, inactive, viscoelastic polymer often used in ophthalmology as a lubricant in ophthalmology or as an excipient or excipient in oral drugs. Appearance: white or white fibrous or granular powder; stability: solid is flammable and incompatible with strong oxidant; particle; 100 pass rate greater than 98.5%; 80 pass rate 100%. Special size 40-60 mesh; carbonization temperature: 280-300℃; apparent density: 0.25-0.70g/cm3 (usually around 0.5 g/cm3), specific gravity 1.26-1.31; discoloration temperature: 190-200℃; surface tension: 2% aqueous solution 42-56 dyne/cm; dissolution performance: soluble in water and some solvents, such as the appropriate proportion of ethanol/water, propane alcohol/water, etc. The aqueous solution is surface-active. High transparency, stable performance, gel temperature of different specifications, solubility changes with the viscosity, the lower the solubility, different specifications of HPMC has different performance, the dissolution of HPMC in water is not affected by pH value; HPMC with methoxy content decrease, gel point increase, water solubility decrease, surface activity also decreases; HPMC also has the thickening ability, low salt resistance, pH stability, water retention, dimensional stability, excellent film forming, and extensive enzyme resistance, dispersion and bonding characteristics.
Main uses of hydroxypropyl methylcellulose Hydroxypropyl methylcellulose (HPMC) applications 1, construction mortar plastering mortar High water retention can make the cement fully hydration, significantly increasing the bond strength. It can improve the tensile resistance and shear strength, improve the construction effect, and improve work efficiency. 2. Water-resistant putty In putty, hydroxypropyl methylcellulose cellulose ether mainly plays the role of water retention, bonding, and lubrication, to avoid cracking and dehydration caused by rapid water loss, at the same time, enhance the adhesion of putty, reduce the flow phenomenon in construction, and make the construction is relatively smooth. 3, paint plaster series In the gypsum series products, hydroxypropyl methylcellulose ether mainly plays the role of water retention, increasing lubrication, and so on. At the same time, it has a certain slow coagulation effect, which solves the problems of drum cracking and initial strength in the construction process, and can extend the working time. 4. Interface agent Mainly used as a thickening agent, it can improve tensile and shear strength, surface coating, and adhesion and bonding strength. 5, external wall thermal insulation mortar Hydroxypropyl methylcellulose cellulose ether in this material focus on the role of bonding, increasing strength, making mortar easier to coat, improve work efficiency. At the same time, more vertical flow resistance and higher water retention performance can extend the working time of mortar, improve the resistance to shrinkage and crack resistance, improve surface quality, and improve the bond strength. Price of hydroxypropyl methylcellulose The different price of hydroxypropyl methylcellulose purity is also different. The market price of hydroxypropyl methylcellulose is in the process of dynamic change. The price of hydroxypropyl methylcellulose can be found on our company's official website. If you need it, you can ask us at any time. Hydroxypropyl methylcellulose supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including molybdenum Silicide, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective hydroxypropyl methylcellulose, you are welcome to contact us or inquire at any time.
