- Time：2023/8/31Posted：SHANDONG KUNDU CHEMICAL CO.,LTD.
What is hydroxypropyl methylcellulose?
Hydroxypropyl methylcellulose is a white, odourless, tasteless powder made chemically through the modification of cellulose.
Cellulose is a natural polymer – long chains or structures made up of many, many molecules strung together.
The Application of HPMC in Hand Sanitizer
In the production process of hand sanitizer, adding an appropriate amount of Hydroxypropyl methyl cellulose can effectively thicken. In addition, Hydroxypropyl methyl cellulose is a non-ionic chemical that will play an irreplaceable role in the application of other thickeners, such as stronger stability, cold resistance, anticoagulation, and electrolyte resistance , better fluidity and a more brushed feel, plus the use of Hydroxypropyl methyl cellulose in hand sanitizer resists irritation and makes hand sanitizer gentler. At the same time, it has good water retention and film-forming properties for hand skin. Its biggest advantage is that it is safe, non-toxic and easy to biodegrade. Secondly, adding Hydroxypropyl methyl cellulose to the hand sanitizer can also improve the foam, provide rich foam, make the hand sanitizer better in contact with human hands, and use less hand sanitizer to achieve better cleaning results.
Sources:
The starting materials for manufacturing HPMC are selected from pure cotton cellulose. The synthetic process incorporates treatment of alkali cellulose with propylene oxide and methylene chloride in an organic solvent-water mixture. The whole process is automatic and monitored by machines. This product does not contain any additives, animal organs, lipids or oils.
Physical properties:
1. Appearance: HPMC is a nonionic cellulose ether, white grayish-white powder or granule，odorless and flavorless, soluble in cold water, glacial acetic acid, ethanol, methanol and propylene glycol, slightly soluble in acetone depending on the degree of substitutions, practically insoluble in hot water, ethylene glycol and toluene. HPMC is dissolved in a mixture of 10% methanol and 90% methylene chloride to form colloidal solutions.
2. The solution of HPMC has surface activity, high transparency, and stable performance. When heated at certain temperature, the solution becomes cloudy or forms flocculent gel. However, the solution becomes clear again after cooling. Different types of HPMC have different gelation temperatures. The solubility varies with the viscosity. The lower the viscosity, the higher solubility it has. The different types of HPMC are different in some properties and their solubility in water is not affected by pH.
3. Particle sizes：100% pass rate in 100 mesh.
4. Apparent density：0.25-0.70 g/mL (usually about 0.5 g/mL)，specific density 1.26-1.31mL.
5. Color change temperature：190-200℃; Carbonization temperature：280-300℃.
6. Surface tension：42-56 dyn/cm (2% aqueous solution).
7. The higher methoxy content in HPMC, the lower gelation temperature, and the higher solubility in water and surface activity.
8. HPMC has some other characteristics, for example, thickening property, pH stability, retention of water, excellent film-forming property, good disperse and adhesion ability.
HPMC specification
Item Type Specification Methoxy (%) 19.0-24.0 27.0-30.0 28.0-30.0 Hydroxypropoxy (%) 4.0-12.0 4.0-7.5 7.0-12.0 Gel temperature 70.0-90.0 62.0-68.0 58.0-64.0 Appearance White or slightly yellowish powder Ash content (%) Max. 5.0 Bulk density 0.30 ~ 0.50 g/cm3 Particle Size min.92% pass through 80 mesh Loss on drying Max.5 Viscosity 320-200,000 mPa.s it can be customized according customer needs. Surface treatment Cold water instant type:surface treated Non-instant type:without surface treatment * Viscosity, Brookfield RV, 2% solution (20℃)
Applications:
Applications KDOCEL HPMC 30M KDOCEL HPMC 40M KDOCEL HPMC 60M KDOCEL HPMC 75M KDOCEL HPMC 100M KDOCEL HPMC 150M KDOCEL HPMC 200M KDOCEL HPMC 400 KDOCEL HPMC 100ML KDOCEL HPMC 100MY KDOCEL MH-PM4 Wall Putty Skim Coat ★★ ★★ ★★ ★★★ ★★★ ★★★ Tile Adhesives ★★ ★★ ★★★ ★★★ ★★★ ★★★ Cement-Based Plasters/Render ★★ ★★ ★★ ★★★ ★★★ ★★★ Gypsum-Based Plasters/Render ★★ ★★★ ★★★ ★★★ Tile Grouts Joint Filler ★★★ ★★★ Repair Mortar Crack Filler External insulation and finish systems (EIFS) ★★★ Shandong Kundu Chemical Co., Ltd. is specialized in Hydroxypropyl Methyl Cellulose (HPMC) production, sales and export trade.
As one of the world top-level supplier for cellulose ether, our products can be widely used in food, pharmaceutical, tile adhesive, paint, coatings, inks, self-leveling, dry-mixed mortar, ceramics, oil-drilling, daily-use chemical etc.
For more information about HPMC, welcome to contact us. We will be happy to help you out!
