Gypsum Special Grade HPMC

Hydroxypropyl methyl cellulose (HPMC) is a non-ionic cellulose ether obtained by cellulose alkalization, etherification, neutralization and washing.

HaoShuo HPMC has good thickening, dispersing, emulsifying, film-forming properties, etc. It is the first choice for production of high quality building materials additives.

Properties of Gypsum Special Grade HPMC

To meet the needs of environmental protection, Our product with high water retention, dispersion, good fineness, good work ability, easy dissolution characteristics. It is widely used in building base materials.It has good water retention and improve the workability. It can also prolong the open time and improve sag resistence.

Plaster plaster, bonding plaster, caulking plaster

Plaster materials are divided into whitewashed plaster, bonding plaster, and caulking plaster. Gypsum products have various different features. In addition to gypsum and related fillers, the key issue is that the added cellulose ether additives play a leading role. Since gypsum is divided into hydrated gypsum, anhydrous gypsum and semi-hydrated gypsum, different gypsum has different effects on the performance of the product, so thickening, water retention, and retardation determine the quality of gypsum building materials. The common problem of these materials is hollowing and cracking, and the initial strength cannot be reached. To solve this problem, it is to choose the type of cellulose and the compound utilization method of retarder. In this regard, hydroxypropyl methyl 30000-60000cps is generally selected, and the addition amount is between 1.5%-2%. It is water retention, retardation and lubrication. Notice to choose HPMC with high water retention.

HPMC water retention mechanism

HPMC is a polymer material with a three-dimensional network structure. There are many hydroxyl groups on the cross-linked network structure. The hydroxyl groups are hydrophilic groups. When it comes into contact with water, the hydrophilic groups will interact with water molecules. Combines into hydrogen bonds and absorbs large amounts of water through chemical adsorption.

The role of HPMC in gypsum products

Shrinkage resistance, hollow resistance and crack resistance

Good sag resistance

Good workability

Good water retention

Environmental protection

More information via https://www.hpmcfactory.com/