Industry knowledge

Application of HPMC in Synthetic Resin Polymerization

By |2022-11-18T08:00:04+00:00November 18th, 2022|Industry knowledge|

Around the 1970s, HPMC began to be used alone or in combination with other dispersants as a protective colloid for the polymerization of synthetic resins. The resulting polymer had more uniform particle shape, low bulk density, better fluidity, thermal stability and processability. Vinyl chloride polymerization, butadiene, acrylonitrile and styrene copolymerization, HPMC or composite system can

Application of hydroxypropyl methylcellulose

By |2022-11-16T06:31:07+00:00November 16th, 2022|Industry knowledge|

Hydroxypropyl methylcellulose is a white, odorless and tasteless powder with different solubility in cold water and hot water. Products with high methoxyl content are insoluble in hot water above 85°C. Products with medium methoxyl content are insoluble in hot water above 65°C. Products with low methoxyl content are insoluble in hot water above 60°C. Ordinary

Viscosity of Hydroxypropyl methylcellulose (HPMC)

By |2022-11-10T09:02:06+00:00November 10th, 2022|Industry knowledge|

The viscosity of the hydroxypropyl methylcellulose solution depends on the following factors: 1. Molecular weight (or degree of polymerization) and concentration of cellulose ether, solution temperature, shear rate and test method. 2. The higher the degree of polymerization of cellulose ether, the larger the molecular weight, and the higher the viscosity of its aqueous solution;

The advantages of hydroxypropyl methylcellulose in the field of building materials

By |2022-11-08T07:12:00+00:00November 8th, 2022|Industry knowledge|

Performance: 1. Easy to mix with dry powder formula. 2. It has the characteristics of cold water dispersion. 3. Effectively suspend solid particles, making the mixture more smooth and uniform. Mix: 1. Dry blend formulations containing cellulose ethers can be easily mixed with water. 2. Get the desired consistency quickly. 3. The dissolution of cellulose

Control of Viscosity and Purity of Hydroxypropyl Methylcellulose

By |2022-11-03T02:36:55+00:00November 3rd, 2022|Industry knowledge|

According to the application needs of the product, there are usually very wide requirements for the viscosity and purity of HPMC. Under the same degree of substitution, the viscosity has a certain effect on the gel temperature: the lower the viscosity, the higher the gel temperature; the higher the viscosity, the lower the gel temperature.

Production process of hydroxypropyl methylcellulose (4)

By |2022-10-31T07:07:36+00:00October 31st, 2022|Industry knowledge|

4. Homogeneous method (dissolution method) production process of HPMC In the alkali leaching, slurry and gas-solid processes, the reaction system is in a multiphase state, which aggravates the uncertainty of the product structure. The structure determines the properties, and the properties determine the application. Therefore, the randomness and inhomogeneity of the type, position and number

Production process of hydroxypropyl methylcellulose (3)

By |2022-10-27T06:55:27+00:00October 27th, 2022|Industry knowledge|

3. The gas phase method (gas-solid method) production process of HPMC Add the pulverized cellulose fine powder into a horizontal reactor with a strong stirring device, directly add a certain amount of lye, etherifying agent and a small amount of recovered low Buddha point by-products, without adding an organic solvent. The etherification reaction was completed

Production process of hydroxypropyl methylcellulose (2)

By |2022-10-25T02:54:12+00:00October 25th, 2022|Industry knowledge|

HPMC liquid phase production process is also called slurry process. It is characterized by using acetone, isoacetone, tert-butyl ketone, toluene, 1,2-methoxyethane or a mixture of lower hydrocarbons and a small amount of lower alcohol as a solvent (or called a dispersant) to make cellulose and alkali, chlorine Methane, propylene oxide, etc. are fully contacted in

Production process of hydroxypropyl methylcellulose (1)

By |2022-10-20T07:22:19+00:00October 20th, 2022|Industry knowledge|

There are many kinds of HPMC production processes, mainly including the following four. We will give you a brief introduction in four articles. 1. The production process of the alkali leaching method (step-by-step method) of hpmc Add the flaky cellulose that has not been pulverized into a special dipping machine, and conduct an alkalization reaction

What is HPMC? HPMC uses

By |2022-10-14T07:14:28+00:00October 14th, 2022|Industry knowledge|

HPMC is the abbreviation of hydroxypropyl methylcellulose, which is a non-ionic cellulose alkyl hydroxyalkyl mixed ether obtained by alkalization, etherification, neutralization and washing of cellulose. As a non-ionic cellulose mixed ether with excellent performance, HPMC, like other cellulose ethers such as CMC, MC, HEC, CMHEC, HEMC, HBMC, etc., has good dispersion, floweriness, thickening, adhesion, water

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