Hydroxypropyl methylcellulose (HPMC)

Product Description

Hydroxypropyl methylcellulose (HPMC) belongs to the group of cellulose ethers in which hydroxyl groups have been substituted with one or more of the three hydroxyl groups present in the cellulose ring (Fig. 3.10). HPMC is hydrophilic (water soluble), a biodegradable, and biocompatible polymer having a wide range of applications in drug delivery, dyes and paints, cosmetics, adhesives, coatings, agriculture, and textiles.

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Specification

ITEMSSPECIFICATIONSAppearanceWhite PowderDecomposition Temperature200minSolid Content98%Discoloration Temperature190-200&#;Viscosity400mPa.sPH Value5~8Density1.39g/cm3Carbonization temperature280-300&#;TypeIndustrial gradeSurface tension42-56dyne/cm for 2% aqueous solution

USES

HPMC is used primarily in construction materials like tile adhesives and renders where it is used as a rheology modifier and water retention agent.

Functionally HPMC is very similar to HEMC (hydroxy ethyl methyl cellulose) Trade names include Methocel and Walocel. The global leading producer is now DuPont, formerly manufactured under Dow Wolff Cellulosics GmbH.

(Hydroxypropyl)methyl cellulose use as thickener for aqueous and non-aqueous systems, clear films with grease resistance, binders, lubricants, steric stabilizer and water retention aid. Dissolves in water, undergoes reversible gelation upon heating, non-ionic, does not complex with ionic species and is surface actuce and enzyme resistant. Solutions are pseudoplastic.

Package

25kg woven bag with liner

Hydroxypropyl Methyl Cellulose (HPMC)

Product Description

Hydroxypropyl methyl cellulose (HPMC) or hypromellose, is a cellulose-based polymer for film coating, wet granulation, and hard capsule manufacturing. It is practically insoluble in hot water, anhydrous ethanol, and dissolves in cold water, resulting in a colloidal solution.

Product Properties

1 . Resistance to salting : Hydroxypropyl methyl cellulose (HPMC) is a nonionic cellulose ether and it is not a polyelectrolyte . The aqueous solution of Hydroxypropyl methyl cellulose (HPMC) is comparatively stable even in the presence of metal salts or organic electrolytes . However, when the concentration of electrolytes exceeds a certain limit, gelation and precipitation may result .

2 . Surface activity : An aqueous solution of Hydroxypropyl methyl cellulose (HPMC) has a high surface activity and functions as a protective colloid agent , emulsion stabilizer and dispersant .

3 . Thermal gelation :An aqueous solution of Hydroxypropyl methyl cellulose (HPMC) will gel or precipitate when heated to a certain temperature , but it reverts to the original solution state on subsequent cooling . The temperature at which gelation or precipitation occur depends on the type of HPMC , its concentration and the rate of heating .

4 . pH stability :The viscosity of an aqueous solution of HPMC is hardly affected by acid or alkali , and the product can develop an original viscosity in the range of 3 . 0~11 . 0 . Therefore , the solution viscosity tends to keep stable during prolonged storage .

5. Water retention :Hydroxypropyl methyl cellulose (HPMC) is a high effective water retention agent . Its pharmaceutical grade product can be widely used in food, cosmetics and many other fields .

6 . Film forming :Hydroxypropyl methyl cellulose (HPMC) provides a strong , flexible and transparent film having a good barrier property against oil and grease .In food application , this property is often utilized for water retention and oil adsorption .

7 . Cohesiveness (Binding property) : Hydroxypropyl methyl cellulose (HPMC) , as a high performance binder, can also be used for molding food and medicine .

Technical Index

Table 1

Item

  Specifications HPMC F E J K

Loss on drying, %

  5.0MAX Residue on ignition,% 1.5MAX Heavy metals,ppm 20MAX PH 5.0~8.0 Bacterium cfu/gram MAX Mold 100cfu/gram MAX Viscosity (2% solution),mPa.s refer to Table 2 ppm 3MAX

Table 2

Level

Specific range (mPa.s)

Level

Specific range (mPa.s)

5

4~9

~

15

10~20

~

25

20~30

~

50

40~60

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~

100

80~120

~

400

300~500

~

800

600~900

~

~

~

~

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Application

*Any other special requirement for the product can be satisfied through the negotiation between Supplier and Buyer.

Hydroxypropyl methyl cellulose (HPMC) is used as adhesive, solutizer in tablet, film-forming reagents in pharmaceutical coating,delayed-release and controlled-release tablets or capsules, thickener and water-binding agent in liquid formulation, component in eye drop.
 

Packaging & Shipping

                                    With pallet                                                            25kg/drum                                                   25kg/bag

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