Description
Introduction of HPMC
Hydroxypropyl methyl cellulose is a kind of white or slightly yellowish powder, odorless, tasteless, and non-toxic. The product can be dissolved in cold water to form a transparent viscous solution. The aqueous solution of this product has surface activity so that it has emulsification, protective colloids and relative stability. PH Stability: the aqueous solution viscosity of this product is relatively stable in the range of PH 3.0—11.0. As the product is non-ionic, and in the preparation process can be effectively purified by washing with hot water, it has a very low ash content. Hydroxypropyl methylcellulose products can fully meet the standards for use of medicine, food, construction and personal care products.
Technical Data:
| Appearance | White or yellowish powder |
|---|---|
| hydroxypropoxy content （wt%） | 4.0-32.0 |
| Methoxyl content（wt%） | 16.5.0-30.0 |
| Fineness | 80 mesh-98% |
| PH Value | 5.0-8.5 |
| Ash Content（wt%） | ≤5 |
| Loss on drying（wt%） | ≤5 |
| Viscosity （Brookfield RVT2%, 20℃） | 100-80000mPa.s |
Physical and Chemical Properties:
1. Carbonization temperature: 280-300 ° C
2. Density: 370-380g/l
3. Surface tension: 2% aqueous solution is 42-56dyn/cm
4. Solubility: soluble in water and some solvents, such as ethanol/water, propanol/water, etc. in appropriate proportions.
5. No ionic charge: It is non-ionic, it does not combine with metallic salts and ionic organics to form insoluble precipitates.
6. Thermal gel property: Gel will be formed when the aqueous solution of cellulose is heated to a certain temperature, and a solution will be after cooling.
7. PH value stability: it has a wide range of pH values.
8. Water retention: It has excellent water retention properties, making the moisture not easy to lose or be absorbed too quickly by the substrate. Some special grades work well in high-temperature environments.
9. Thickening: its aqueous solution system has the thickening property, and the consistency is related to the viscosity of the product used and the type of compound.
10. Film formation: It can be made into a transparent, tough, soft film with excellent resistance to grease.
11. Adhesion: It can be used as a binder for tile adhesives, pigments, tobacco products, paper products, coating, etc.
12. Suspension: It can prevent the precipitation of solid particles because the formation of the sediment can be inhibited.
13. Protective colloid: It can prevent small granules or particles from forming a mass.
14. Emulsification: The emulsion liquid can be stabilized by reducing the surface and interfacial tension and thickening the aqueous phase.
15. Anti-sagging: It can improve the thixotropy of the product so that the finished product does not slip even at considerate thickness.
16. Wetting ability: Cellulose has the property of wetting the substrate, no curling even if applied to a special substrate.
17. Open time: It can extend the hardening time of the product, make the raw materials fully hydrated, and improve the tensile strength and flexibility of the product.
Type and Application of Industrial Grade HPMC
Application Fields:
1.Binder: Used as a thickener and binder in the adhesive formulation.
2.Ceramic: Gives lubricity, water retention and increases the original strength of the ceramic embryo.
3.Building materials: Mixing into cement, so that cement mortar, plaster, and gypsum ingredients have water retention properties and improve their workability.
4.Cosmetics: Regulate rheology to give the product the right viscosity, emulsification, stability, lubricity and foam stability, and surfactant compatibility.
5.Leather: It is used as a thickener and water-retaining agent for leather surface protective rubber when it is processed and dried during leather processing.
6.Latex coating: as a protective colloid, thickener, and pigment dispersant
7.Paint stripper: Conducive to the compatibility of water and organic solvents, thickener in blade coating, and rinse-off paint remover
8.Paper products: Film-forming agent for surface sizing or oil repellent coatings.
9.Plywood: Adjusting the rheology of the binder
10.Various resins and rubbers: fiber-reinforced plastic molding release agent, water-based coating emulsifiers, thickeners, and stabilizers.
11.Textiles: as a textile sizing material, thickeners, and stabilizers in printing paste or latex paints.
Packaging & Storage & Shelf Life:
Packaging: 25 kg/bag (customized packaging and weight available)
Inner: PE plastic film bag, outer: PP woven bag.
Storage: Store in a ventilated, cool, dry environment, to prevent the sun and rain.
Shelf life: 12 months since the production date.
Remark: Please make a test before use if the product is out of the expiring date.
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