Physicochemical property
1.Appearance: White or kind of white powder.
2.Particle size: 100 mesh pass rate is greater than 98.5%, 80 mesh pass rate is greater than 100%.
3. Carbonization temperature: 280-300℃.
4.Apparent density:0.25-0.70 g/cm.(Usually around 0.5g/g/cm³), specific gravity 1.26-1.31.
5. Color change temperature:190-200℃.
6. Surface tension: 42-56dyn/cm in 2% aqueous solution.
7. Soluble in water and some organic solvents, such as appropriate proportion of ethanol, water, dichloroethane, etc. An aqueous solution has surface
activity.High transparency, stable performance, different specifications of product gel temperature is different, solubility changes with viscosity, the
lower the viscosity, the greater the solubility, different specifications of HPMC its performance has a certain difference, HPMC in water dissolution
is not affected by the PH value.
8.HPMC also has the thickening ability, salt drainage, low ash content, PHstability, water retention, excellent film formation, and a wide range of
enzyme resistance, dispersion and cohesiveness.
Main uses
This product is industrial grade HPMC, mainly used as dispersant in the production of PVC, is the main additives for the preperation of
PVC by suspension polymerization. In addition, in the production of other petrochemical, building materials, paint removal agent,agriculruml
chemicals, ink, textile printing and dyeing, ceramics, paper, cosmetics and other products as thickening agent, stabilizer, emulsifier, excipient,
water retaining agent, film forming agent, etc. The application in synthetic resin can make the product has the characteristics of regular, loose,
depending on specific gravity, excellent processing performance, so as to basically replace gelatin and polyvinyl alcohol as dispersant. In
addition, in the construction process of the construction industry, mainly used for building walls, stucco, caulking and other mechanized
construction. Especially in decorative construction, used for pasting tile, marble, plastic decoration, paste strength is high, but also can reduce
the amount of cement. Used in the coating industry as a thickening agent, can make the coating bright and fine, do not depowder, improve
leveling performance. Used in plaster gypsum, bonding gypsum, caulking gypsum, water resistant putty can significantly improve its water
retention, bond strength, etc.
Dissolution methods
1,Take the required amount of water and heat it in a container to more than 85℃.Gradually add the product under
slow stirring. Cellulose floats on the water surface at first, but is gradually dispersed by water to form a uniform slurry. Let cool
under stirring until clear.
2,Heat 1/3-2/3 of the total water to more than 85℃, add cellulose, get hot water slurry, and then add the remaining
amount of cold water, keep stirring and cooling to get a uniform solution.
3, After the surface treatment of the product, can be stirred directly into cold water to dissolve, for rapid dissolution,
available ammonia or alkali water PH8-10, the product will quickly dissolve, forming a solution.
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