Hydroxypropyl methylcellulose (HPMC) is a non-ionic cellulose ether obtained by a series of complex chemical processing, mainly using natural polymer material refined cotton as the main raw material. A wide range of applications, which is mainly used in the construction industry - dry powder building materials.
aspartic acid 1520 is a non-ionic cellulose ether obtained by a series of complex chemical processing, mainly using natural polymer material refined cotton as the main raw material. A wide range of applications, which is mainly used in the construction industry - dry powder building materials such as water-resistant putty powder, putty paste, tempered putty, paint glue and thermal insulation mortar. Customers need customization. OEM and ODM is samely appliable in cellulose ether powder.
The main functions of hydroxypropyl methylcellulose in putty powder are as follows:
1. After hydroxypropyl methylcellulose is dissolved in the putty powder, the methoxy and hydroxypropyl groups on its molecular chain will react with the aluminum ions and calcium ions in the putty powder, and then a viscous gel will be formed. And it is filled in the voids of the putty powder, which greatly improves the compactness of the putty powder, and has the effect of reinforcement and flexible filling. However, when the composite matrix is ​​compressed, the polymer cannot play a rigid supporting role, thereby reducing the strength and the compression-folding ratio of the putty powder.
2. After hydration of hydroxypropyl methylcellulose, a thin latex film will be formed between the putty powder particles. This film has a sealing effect, which will improve the surface dryness of the putty powder to a certain extent. Because hydroxypropyl methylcellulose has good water retention properties, enough water molecules are kept inside the putty powder, which ensures the hydration and hardening of the putty powder and the complete development of the strength, thereby improving the putty powder. At the same time, the cohesiveness of the putty powder is improved, so that the putty powder has good flexibility and plasticity, and the deformation and shrinkage of the putty powder can also be reduced.
3. The water retention of putty powder mainly refers to the function of putty powder to lock and retain water. The higher the viscosity of hydroxypropyl methyl cellulose ether, the better the water retention. This is mainly because the cellulose structure contains hydroxyl and ether bonds, and the oxygen atoms on the hydroxyl and cellulose ether bonds associate with water molecules to form hydrogen bonds, so that free water becomes bound water, and entangles water to retain water.
4. The air-entraining effect of hydroxypropyl methylcellulose is mainly due to the fact that cellulose is also a kind of surfactant. The interfacial activity of cellulose ether mainly occurs at the gas-liquid-solid interface, first is the introduction of bubbles, followed by wetting and dispersion. Cellulose contains alkyl groups, which can significantly reduce the surface tension and interfacial energy of water, resulting in the formation of many smaller closed bubbles during the stirring process of the aqueous solution.
5. The finer the particles of hydroxypropyl methylcellulose, the better the water retention. The surface of the coarse-grained cellulose will dissolve immediately after contacting with water, and a gel phenomenon will be formed. The glue wraps the material, thereby preventing the water molecules from continuing to penetrate, and sometimes it cannot be dispersed and dissolved evenly after a long time of stirring, forming a turbid flocculent agglomeration or solution. The fine particles will disperse and dissolve immediately after contacting with water to form a uniform viscosity.
The hydroxypropyl methyl cellulose(HPMC), HEMC and the redispersible polymer powder RDP are our main hot products. Since the company was founded in 2010, which has always been adhering to the people-oriented, the principle of sincerity. The company continued to deepen the reform, the comprehensive implementation of quality management, product quality is stable, the company pays special attention to the production and business operation in the quality of the products.