HPMC: hydroxypropyl methyl cellulose

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[Abstract]:

HPMC:

Hydroxypropyl methyl cellulose. This product is non-ionic cellulose ether, the appearance is white powder, odorless tasteless, soluble in water and most polar organic solvents and the appropria

HPMC:

Hydroxypropyl methyl cellulose. This product is non-ionic cellulose ether, the appearance is white powder, odorless tasteless, soluble in water and most polar organic solvents and the appropriate proportion of ethanol/water, propanol/water, dichloroethane, in ethyl ether, acetone, anhydrous ethanol insoluble, in cold water swelling into clear or slightly cloudy colloidal solution. Aqueous solution has surface activity, high transparency and stable properties. HPMC has the property of hot gel. The product aqueous solution is heated to form gel precipitation, and then dissolved after cooling. The gel temperature of products of different specifications is different. The solubility varies with the viscosity. The lower the viscosity, the greater the solubility. The HPMC of different specifications has certain differences in its properties. Graininess: the passing rate of 100 mesh is greater than 100%. Heap density: 0.25-0.70g/ (usually around 0.4g/), specific gravity: 1.26-1.31. Color changing temperature: 180-200℃, carbonization temperature: 280-300℃. HPMC has thickening ability, salt discharge, PH stability, water retention, dimensional stability, excellent film-forming and extensive enzyme resistance, dispersion and adhesion. 1. Construction industry: as a water-retaining agent and retarder of water and sediment slurry, the slurry is pumped. Apply mortar, plaster, putty powder, or other building materials as a binder to improve smearing and extend operating time. Be used as pasting ceramic tile, marble, plastic adornment, pasting intensifier, still can reduce cement dosage. HPMC water retention performance so that the paste in the daub will not dry too fast and crack, enhance the strength after hardening. 2. Ceramic manufacturing: widely used as adhesive in the manufacture of ceramic products. 3. Coating industry: the coating industry as a thickener, dispersant and stabilizer, in water or organic solvents are good intermiscibility. As a paint remover. 4. Ink printing: in the ink industry as a thickener, dispersant and stabilizer, in water or organic solvents are good intermiscibility. 5. Plastics: for forming release agent, softener, lubricant, etc. 6. Polyvinyl chloride: used as dispersant in the production of polyvinyl chloride, it is the main auxiliary agent for the preparation of PVC by suspension polymerization. 7. Others: this product is also widely used in leather, paper products, fruit and vegetable preservation and textile industries. 8. Pharmaceutical industry: coating materials; Membrane material; Controlled polymer materials for sustained-release preparations; Stabilizing agent; Suspended aid; Tablet adhesive; Increases the goo

1. All models can be added to the material by dry mixing; 2. When it is needed to be added directly to the aqueous solution at room temperature, it is better to use cold water dispersion, and generally 10-90 minutes to thicken; 3. For ordinary models, after stirring and dispersing with hot water, it can be dissolved after adding cold water and stirring; 4. If caking occurs when dissolving, it is because the stirring is not sufficient or ordinary model is directly added to cold water, so it should be stirred quickly. 5. If bubbles are generated during dissolution, they can be left to stand for 2-12 hours (the specific time is determined by the solution consistency) or removed by means of vacuumization and pressure, or an appropriate amount of defoaming agent can be added

Cellulose ether: cellulose ether