Precautions for construction and application of hydroxypropyl methylcellulose

Precautions for construction and application of hydroxypropyl methylcellulose
r br Hydroxypropyl methylcellulose
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br Physical and chemical properties<>
br
br Appearance White or off-white powder.
Particle size
mesh pass rate is greater than
mesh pass rate is greater than
.
Carbonization temperature
℃
Apparent density/
usually around
,
specific gravity
.
Color change temperature
℃
Surface tension
Aqueous solution is
soluble in water and some solvents
such as ethanol, water, propanol, water and trichloroethane in appropriate proportions wait. Aqueous solutions are surface active. <>
br < Precautions for construction and application of hydroxypropyl methylcellulose
Main uses<>
b This product is industrial grade
and is mainly used in the production of polyvinyl chloride It is used as a dispersant and is the main additive in suspension polymerization preparation. In addition, in the production of other petrochemical coatings, building materials, paint removers, agricultural chemicals, inks, textiles, printing and dyeing, ceramics, paper, cosmetics and other products, it is used as a thickener, stabilizer, emulsifier, excipient, water-retaining agent, film-forming agent, etc. The application in synthetic resin can make the products have the characteristics of regular and loose particles, suitable specific gravity, and excellent processing performance, thus basically replacing gelatin and polyvinyl alcohol as dispersants. In addition, in the construction process of the construction industry, it is mainly used in mechanized construction such as wall building, stucco decoration, and caulking. Especially in decorative construction, it is used to paste ceramic tiles, marble, and plastic decorations. It has high bonding strength and can also reduce the amount of cement. Used as a thickening agent in the coating industry, it can make the layer bright and delicate without powder removal, and improve the leveling performance. <>
br Dissolution method<>
br
br Take the required amount of hot water, put it into a container and heat it to above
℃, gradually add this solution while stirring slowly. The cellulose initially floats on the surface of the water, but is gradually dispersed to form a uniform slurry. The solution is cooled with stirring.
Or heat the hot water to above, add cellulose to obtain a hot water slurry, then add the remaining amount of cold water, keep stirring, and cool the resulting mixture.
Precautions for storage and transportation of four packages
Various viscosities
Wan Wan
Wan Wan Wan
Wan Wan Wan, packed in cardboard drums lined with polyethylene film, each Net weight of barrel
Protect from sun, rain and moisture during storage and transportation.
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Precautions for construction and application of hydroxypropyl methylcellulose