PVA Fiber for Concrete
PVA fiber for concrete (or mortar) is an ideal environment-friendly cement reinforcement material, because of its unique molecular structure, it has good affinity with cement, and has good alkali resistance and weather resistance. Adding PVA fibers to cement concrete (or mortar) can effectively control the cracks caused by plastic shrinkage and temperature changes in concrete […]
Application and characteristics of polyvinyl alcohol thickener
In the paper industry, it is also widely used, because it can not only improve the wear resistance, folding resistance and tear resistance of paper, but also improve gloss, smoothness and printing adaptability. When used in construction glue, it can improve the fluidity of the original product, increase the consistency and make it easier for […]
Application of HPMC in Chemical Industry
Polymerization of vinyl chloride and vinylidene: As a suspension stabilizer and dispersant during polymerization, it can be used together with vinyl alcohol (PVA) hydroxypropyl cellulose (HPC) to control particle shape and particle distribution. Adhesive: As the adhesive of wallpaper, it can usually be used together with vinyl acetate latex paint instead of starch. Pesticides: when […]
HPMC pharmacology and toxicology
Hypromellose is a part of methyl and part of polyhydroxypropyl ether of cellulose. It can be dissolved in cold water to form a solution with a certain viscosity, and its properties are close to the viscoelastic substances (mainly mucin) in tears. Therefore, it can be used as artificial tears. Its mechanism of action is as […]
Effect of temperature on water retention of HPMC
Hydroxypropyl methylcellulose can be mixed with water-soluble polymer compounds to form a homogeneous, higher-viscosity solution. Such as polyvinyl alcohol, starch ether, vegetable gum, etc. The adhesion of hydroxypropyl methyl cellulose to mortar construction is higher than that of methyl cellulose. Hydroxypropyl methylcellulose is more resistant to enzymes than methylcellulose, and its solution enzymatic degradation is […]
Characteristics of HPMC
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. Hydroxypropyl methylcellulose is stable to acid and alkali, and its aqueous solution […]
Dissolution method of HPMC
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 […]
Suspension Polymerization of HPMC
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. As a water-soluble polymer, HPMC product has excellent surface activity and acts as a colloid protective agent, which can effectively prevent […]
How to simply and intuitively identify the quality of hydroxypropyl methylcellulose hpmc?
(1) 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. (2) Fineness: The fineness of HPMC is generally 80 mesh and 100 mesh, and 120 mesh is less. Most […]
Important properties of HEC
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: HEO is soluble in hot or cold water, and does not precipitate at high temperature or boiling, so that it has a wide range of solubility and viscosity characteristics, […]
