Hydroxypropyl methyl cellulose (HPMC) is a cellulose mixed ether variety whose output, dosage and quality have been rapidly increasing in recent years. Non-ionic cellulose mixed ether made by other processes.
HPMC has good dispersing, emulsifying, thickening, cohesive, water-retaining and gum-retaining properties. It is soluble in water, and can also be dissolved in ethanol and acetone below 70%. HPMC with special structure can also be directly dissolved in ethanol. HPMC can be widely used as film coating, sustained release agent and binder for pharmaceutical preparations, and can also be widely used in petrochemicals, building materials, ceramics, textiles, food, daily chemicals by using its thickening, dispersing, emulsifying and film-forming properties. , synthetic resin, medicine, paint and electronics and other fields.
The production process of HPMC can be divided into two categories: gas phase method and liquid phase method. At present, developed countries such as Europe, the United States and Japan use more gas-phase process, using wood pulp as raw material (cotton pulp is used to produce high-viscosity products), alkalization and etherification are carried out in the same reaction equipment, and the main reaction is a horizontal reaction. The kettle has a central horizontal stirring shaft and a side rotating flying knife specially designed for the production of cellulose ether, which can obtain a good mixing effect.
Industry analysts from Xinsijie said that with the continuous growth of the economy and the continuous improvement of the quality of life of the people, the demand for hydroxypropyl methylcellulose in the Chinese market has continued to increase. For a long time, my country’s hydroxypropyl methylcellulose market demand is mainly concentrated in the fields of construction and coatings. With the continuous development of downstream industries, the demand for hydroxypropyl methylcellulose in the food and pharmaceutical fields has begun to expand rapidly. In the future, the construction, food and pharmaceutical industries will be an important driving force for the growth of my country’s hydroxypropyl methylcellulose market.
Post time: Nov-03-2022