Product Description

Hydroxypropyl methylcellulose (INN name: Hypromellose), also simplified as hydroxypropyl methylcellulose (HPMC), is a variety of nonionic cellulose mixed ethers. It is a semi-synthetic, inactive, viscoelastic polymer .This product is industrial grade HPMC, mainly used as the dispersing agent for PVC production and as the main assistant used in producing PVC suspension polymerization.

It is also used as thickener, stabilizer, emulsifier, excipient, water retention agent, and film-forming agent etc.in producing petrochemicals, building materials, paint removers, agricultural chemicals, inks, textiles, ceramics, paper. cosmetics and other products.

Physicochemical Properties

1. Exterior: White or off-white powder

2. particle size: the passing rate of 80 mesh is 100% the passing rate of 100 mesh is more than 99.5%

3. Charring density:280-300ºC

4. Apparent density: 0. 25-0.70g/cm(usually around 0.5g/cm), the proportion is 1.26-1.31

5. Thermochromic temperature: 190-200ºC

6. Surface tension: 2% of aqueous solution is 42-56dyn/cn.

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 80 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°C; Carbonization temperature:280-300°C.
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.
 

Application

1. Construction industry: As a water-retaining agent and retarder of cement mortar, it makes the mortar pumpable. Used as a binder in plaster, gypsum, putty powder or other building materials to improve application and prolong operation time It can be used to paste ceramic tiles, marble, plastic decoration, paste reinforcement, and reduce the amount of cement. HPMC's water-retaining properties prevent the paste from cracking because it dries too quickly after application, enhancing the strength after hardening.
2. Detergent manufacturing industry: HPMC is used in washing mainly to prevent the removed dirt by detergents from re-deposition on the fabric. Furthermore, adding carboxyl methyl cellulose in the production of detergents can have effective thickening effects on the detergent slurry and liquid soap, as well as can stabilize the structure of components.
3. Coating industry: as thickener, dispersant and stabilizer in coating industry, it has good compatibility in water or organic solvents. As a paint remover.

Packing and shipping
 

Hydroxypropyl Methyl Cellulose(HPMC) Packing:

25 kg kraft paper compound bag, inside with PVC plastic bags

Storage and Delivery:

Prevent rain and sunny, prevent fire and damp, airtight ventilation preservation, according to non-dangerous goods shipping.

Company profile
 

Shijiazhuang Xinweite Building Materials Co.,Ltd local at Jinzhou City,Hebei Province,China.

Professional in producing the HPMC,HEMC and RDP that using for the line of construction,Industry and Chemical. Xinweite company is a research and development production and marketing into a business with a number of highly qualified technical, rich superb technical personnel to advanced management and unique technology.We provide the construction additives with the best price and service to our customers, such as Re-dispersible emulsion powder,Hydroxypropyl Methyl Cellulose. We can meet different type of products according to our customer requirements.Xinweite serve customers around the world.

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