Hypromellose (HPMC)

Product description

the hypromellose is Methyl cellulose propylene glycol ether, in which the hydroxypropyl and methyl groups are combined by ether bonds and cellulose's anhydrous glucose ring. It is a white to grayish white cellulose powder or granule, similar to Methyl cellulose, it is soluble in cold water and insoluble in hot water. Its solubility in organic solvents is better than that in water, and it can be dissolved in anhydrous methanol and ethanol, chlorinated hydrocarbons, ketones and other organic solvents. Soluble in water, its aqueous solution has surface activity, forms the film after drying, after heating and cooling, in turn undergoes the reversible conversion from Sol to Gel. In cold drinks can be used alone, but also with other emulsifiers, stabilizers, the maximum amount of cold drinks 1% . In recent years, it has been widely used as dispersant, thickener, adhesive, excipient, capsule, oil-resistant coating and Filler in petrochemical, paper making, leather, textile printing and dyeing, medicine, food, cosmetics, etc. .

2.Product specifications

 2.Product specifications

Note: viscosity of 1% aqueous solution at 20 ° C. 2% water solution at 20 ° C.

Product Properties

(1) properties: This product is a white or slightly yellow powder, and odorless, tasteless, non-toxic.

(2) water solubility and thickening ability: this product can be dissolved in cold water to form a transparent viscous solution.

(3) dissolution in organic solvents: Because it contains a certain amount of hydrophobic methoxyl, the product can be soluble in some organic solvents, but also soluble in water and organic mixture of solvents.

(4) salt resistance: as this product is non-ionic and non-polymeric electrolytes, it is relatively stable in metal salts or organic electrolytes in aqueous solutions.

 (5) surface activity: The aqueous solution of this product has surface activity, making it emulsifying, protecting colloid and relative stability.

(6) thermal gelation: When heated to a certain temperature above the water solution can become opaque, the formation of precipitation, so that the solution lost viscosity. But it cools and then changes back to the original solution. The temperature at which condensation and precipitation occur depends on the type of product, the concentration of the solution, and the heating rate.

 (7) low ash content: Because this product is non-ionic, in the preparation process can be washed with hot water effectively refined, so its ash content is very low.

(8) Ph stability: The viscosity of the aqueous solution of this product is relatively stable in the range of PH 3.0 ~ 11.0.

(9) water retention: Because this product is hydrophilic and its aqueous solution is high viscosity. It is added to mortar, gypsum, paint and so on, in products to maintain a high water retention effect.

 (10) shape preserving: compared with other water-soluble polymers, the aqueous solution of this product has special viscoelastic properties. Its addition has the ability of improving the shape invariability of the extruded ceramic products and so on.

 (11) lubricity: The addition of this product can reduce the friction coefficient and improve the lubricity of extruded ceramic products and cement products.

(12) film-forming: this product can produce a strong flexible, transparent sheet, has good oil resistance and ester resistance

5. Packing and transportation

Packing: double-layer Bag, Outer Composite Paper Bag, inner polythene film bag, each bag net weight 25kg. Storage and transportation: Store in a dry, ventilated place indoors, pay attention to moisture-proof. Rain and Sun Protection during transportation.

6.Safety Issues

(1). The product is at risk of dust explosion. When handling in bulk or bulk, be careful to avoid dust deposition and suspension in the air, away from heat, sparks, flames, and static electricity.

(2) . Avoid Methyl cellulose, powder and contact with eyes. Wear a filter mask and safety goggles.

(3) . The product is very slippery when wet. The spilled Methyl cellulose and powder should be cleaned in time, and anti-skid treatment should be done.