Hydroxy Propyl Methylcellulose Putty Powder Uses Hydroxy Propyl Methylcellulose

Hydroxy Propyl Methylcellulose Putty Powder Uses Hydroxy Propyl Methylcellulose

Hydroxy propyl methylcellulose is a water-retention additive used in dry mixed mortar, ceramic tile adhesives, plastering gypsum material, putty powder, self-levelling mortar and other building materials.hpmc 100000 cps viscosity hpmc internal and external wall putty powder uses hydroxy propyl methyl cellulose It can prevent moisture loss and improve construction performance, such as bond strength, workability and sagging resistance. It also can improve the durability of the putty and enhance its abrasion resistance, alkali resistance and impact strength. It can be dissolved in hot or cold water to form a transparent solution with a specified viscosity.

The present invention provides a process for making a hydroxy propyl methylcellulose-based putty powder. The method includes dissolving the cellulose ether in water to form a solution, adding a binder, mixing the ingredients and spray drying. The resulting putty powder has a higher water retention, lower sagging and improved leveling properties. It can be stored in a sealed moisture-proof bag.

A hpmc 100000 cps viscosity hpmc internal and external wall putty powder uses hydroxy propyl methylcellulose powder is a nonionic cellulose ether that can be dissolved in either hot or cold water to form a transparent emulsion with a specified viscosity. It is widely used in the construction industry as a retarder for cement slurry to enable mortar with pumping, to improve its water retention and reduce the amount of cement. It is a key ingredient for ceramic tile adhesives, as it increases the adhesive strength and tensile strength of the bond, and makes it more resistant to cracking. It is also used as a filler, to reduce the amount of cement and to make a plastering gypsum material more porous.

Another use of hpmc is in paints, to help the slurry not dry too fast after application and to enhance its strength after hardening. It is also used in other petrochemical, paint and building chemical industries as a thickener, dispersant and stabilizer.

The hpmc is less hygroscopic than polyvinylpyrrolidone (PVP) and methylcellulose (MCC), and it minimizes the particle agglomeration during spray drying and enhances the uniformity of the particles. It can also prevent agglomeration of other additives during spray drying, such as water-repellent agents and anti-caking additives.

A DSC curve of a hydrated raw hpmc 3 cP sample is shown in Figure 2. The peak associated with crystallization is absent, while the melting peak is clearly visible. This indicates that the hydrates form strong hydrogen bonds with the hydroxyl groups of cellulose chains, and thus greatly reduces the contribution of moisture to hydrolysis reactions. This effect is more pronounced for low NFW content samples.

Tags:cellulosic hpmc | high viscosity hpmc | high water retention hpmc thickener agent ceramic grade cellulose ether honeycomb ceramics hpmc