The ANS Panel considered that the read-across from methyl cellulose and carboxymethyl cellulose to other modified celluloses bearing similar simple substituents (including HPMC) was justified.
The present assessment is based on data submitted by the applicant in the form of a technical dossier5 in support of the authorisation request for the use of HPMC as a feed additive.
Solubility: HPMC is practically insoluble in absolute ethanol, ether, and acetone. HPMC is soluble in cold water and insoluble in hot water. HPMC will get gel when the temperature is up to 55-75. Hydroxypropyl methylcellulose after gelation is like jelly. This gel is related to methoxy content.
The particle size and shape are critical factors that influence the redispersibility of the final product, and they are controlled by adjusting the spray-drying conditions such as the inlet and outlet temperatures, feed rate, and nozzle design The particle size and shape are critical factors that influence the redispersibility of the final product, and they are controlled by adjusting the spray-drying conditions such as the inlet and outlet temperatures, feed rate, and nozzle designredispersible polymer powder manufacturing process.
hpmc uses. It provides excellent adhesion, flexibility, and durability to the paint film, making it resistant to water, chemicals, and abrasion. HPMC is also used in the production of adhesives, sealants, and mastics, where it helps to improve their flexibility, workability, and adhesion.HPMC gel is used in cementitious products such as mortars and grouts to enhance the material’s water retention, workability and overall properties.
However, in general, higher viscosity results in better water retention. Therefore, many dry mortar manufacturers opt for medium viscosity cellulose (75,000-100,000) as a substitute for low-medium viscosity cellulose (20,000-40,000) to reduce the required dosage, considering cost factors.
