Product Information

Hydroxy Propyl Methyl Cellulose (HPMC)

Appearance	white or white-like fibrous or granular powder; odorless
Solubility	HPMC can not dissolve in grain alcohol, aether and acetone without water in them and can dissolve into clear or slight feculent colloidal solution, also dissolve into some Organic solvents and the mixed solvent of water and organic solvent
Granularity	100 mesh sieve pass rate > 98.5%; 80 mesh sieve pass rate is 100%.
Apparent density	0.30 - 0.70 g/cm3, density: 1.26 -1.31g/cm3

Product uses

Quality Concrete Chemical can be used as thickening agent, dispersant emulsifying agent and film-forming agent
etc. Industrial grade products are well used in household chemicals, electronics synthetic rubber building and paint

The characteristics of the product

(1).Salt resistance: HPMC is non-ionic cellulose ether, not polyelectrolyte, so it is relatively stable in aqueous solutions when
metal salt or organic electrolyte is available, but excessive electrolyte can produce gel and sediment.
(2).Surface activity: HPMC solution has the function of surface activity, which can be used as colloid protecting agent, emulsifying agent and dispersant.
(3). Thermal gelation: HPMC solution can become .opaque and produce gel and sediment when Concrete Chemical Admixtures is heated to a certain temperature,but it will be restored to its initial solution state during continuous cooling. The temperature that forms gel and sediment mainly depends on its type, concentration and heating rate.
(4). PH stability: acid or alkaline conditions almost cannot affect the viscosity of HPMC solution, and PH value is relatively
stable in the range of 3.0-11.0
(5). Water retentivity: PCE Liquid Raw Materials is a kind of water preserving agent with high efficiency. Reducing Concrete Additive is widely used in ceramics, building
material and many other aspects.
(6). Cohesiveness: as a king of cementing material with high property, HPMC is used for paint, paper making, tobacco products and ceramics products.

The use of the product

When HPMC products are directly added to water, condensation appears, and then dissolves. However, it takes a long time and difficult for dissolution. According to the usage, the client can choose the most convenient approach from the following three suggestions for dissolution methods:
(1). Hot water method: add the amount of 1/3 or 2/3 water needed in the container, heat to over 80°℃. As not dissolve in the hot water, HPMC is distributed evenly in the hot water at the beginning of dissolution; add remaining cold water or ice water into hot-water slurry, and then stir and cool it.
(2). Power fixed method: HPMC powder particles and equivalent or even larger amount of other power can be dispersed well by dry-blending, then dissolve it with water. At the moment, HPMC can dissolve but not condensate
(3). Organic solvent wetting method: pour HPMC into organic solvent. For example, alcohol, glycol or oil is pre-dispersed or wetted, then dissolve it with water; HPMC also can be smoothly dissolved.

Product notes

the surface-treated HPMC can be dampened down by cold water first, then add ammonia water or alkaline water until PH value reaches between 8-10, which forms viscosity.

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Product Categories : Other Concrete Admixtures