Hydroxypropyl methylcellulose (HPMC) is a semi-synthetic compound obtained from lignin by oxidation, methylation and hydroxypropyylation. It is a water-soluble polymer that can form colloidal solutions in water. Due to its good water solubility, viscosity adjustment performance, degradation performance and other characteristics, HPMC is widely used in building materials, cosmetics, food, medicine and other fields.

Performance index
The following are common performance indicators of hydroxypropyl methyl cellulose:

Viscosity: Viscosity is one of the most basic performance indicators of hydroxypropyl methyl cellulose, which can affect its rheological properties and use effects in coating, cement mortar and other applications.

Solid content: The solid content of hydroxypropyl methyl cellulose can affect its use effect and cost, and the common solid content is 4%-12%.

Thermal stability: The thermal stability of hydroxypropyl methyl cellulose at high temperatures can affect its stability when applied to high temperatures.

Water solubility: The water solubility of hydroxypropyl methyl cellulose can affect its dispersion and rheological properties in water-based coatings, cement mortars and other applications.

pH value: The pH value of hydroxypropyl methyl cellulose has a certain impact on its stability and use effect.

Performance index of hydroxypropyl methyl cellulose

Degree of esterification and hydroxypropyl: The degree of esterification and hydroxypropyl methylcellulose can affect its use effect and performance in different applications.

Water absorption: The water absorption of hydroxypropyl methyl cellulose can affect its solubility and use effect in dry powder materials.

Rheological properties: The rheological properties of hydroxypropyl methyl cellulose in coatings, adhesives and other applications can affect its compatibility and use effect with other materials.

As a reminder, different types of hydroxypropyl methylcellulose may need to be tested for their specific properties, and the specific test methods and instruments may also vary depending on the type of hydroxypropyl methylcellulose.