Gas phase method: The gas phase method is to add additives or diluents during the reaction process, and the alkali fibers and EO react in the gas phase. The cotton fibers were soaked and activated in 18.5% NaOH solution, then pressed and crushed and placed in the reactor.

As a non-ionic surface agent, hydroxyethyl cellulose has the following properties in addition to thickening, suspending, binding, flotation, film-forming, dispersing, water retention and providing protective colloids

Whiteness: Although whiteness cannot determine whether HPMC is easy to use, and if a brightener is added in the production process, it will affect its quality. However, most of the good products have good whiteness.

In the production of synthetic resins such as polyvinyl chloride (PVC), polyvinylidene chloride and other copolymers, suspension polymerization is most commonly used and it is necessary to stabilize the hydrophobic units suspended in water.

Take the required amount of hot water, put it into a container and heat it to above 85°C, and gradually add this product under slow stirring. The cellulose floats on the water at first, but is gradually dispersed to form a uniform slurry. Cool the solution. Or heat 1/3 or 2/3 of the hot water to abo......

Hydroxypropyl methylcellulose is easily soluble in cold water, but difficult to dissolve in hot water. But its gelation temperature in hot water is significantly higher than that of methyl cellulose. The dissolution in cold water is also greatly improved compared with methyl cellulose.