Hydroxypropyl Methylcellulose is non-ionic cellulose ether, in the shape of white powder, odorless and tasteless.
CAS Number:9004-65-3
HS: 3912 90
Einecs : 220-971-6
Molecular Formula: C12H20O10
Molecular Weight: 324.2848
1. Solubility
The product is soluble in water and part of solvents such as alcohol-water and propyl alcohol-water solvents in an appropriate proportion. The aqueous solution owns surface activity, high transparency and stable properties. Products of different specifications have different gelation temperatures and the solubility changes with the viscosity. The lower the viscosity is, the higher the solubility will be. HPMC products with different specifications also have difference in properties and the dissolution of HPMC in water doesn?t get affected by the pH value.
As the methoxyl content decreases, the gel point of HPMC rises; the water solubility decreases and the surface activity will accordingly reduce.
Besides, HPMC has thickening capacity, salt tolerance, low ash content, pH stability, water-retaining property, dimensional stability, excellent film-forming ability, extensive resistance to enzymes, dispersibility and cohesiveness.
2. Application
1). Hydroxypropyl Methylcellulose in the Construction Industry
As the water-retaining agent and retarder of cement mortar, it enables mortar to own pumping capability. In cement mortar, gypsum slurry, putty powder or other building materials, it can function as adhesives to enhance smearing capacity and prolong operable time. In ceramic tiles, marble and plastic decoration, HPMC can be used as pasting strength agent and reduce the cement content. Water retention capacity of HPMC helps to prevent the crazing of slurry resulting from drying quickly and to enhance the strength after hardening.
2). Hydroxypropyl Methylcellulose In the Ceramic Manufacturing Industry
In the ceramic production, it is widely used as adhesives.
3). Hydroxypropyl Methylcellulose In the Coating Industry
In the coating industry, it acts as thickening, dispersing and stabilizing agents. It has good solubility to water or organic solvents and can also function as the paint remover.
4). Hydroxypropyl Methylcellulose In Ink Printing
In the printing ink industry, it functions as thickening, dispersing and stabilizing agents, and has good solubility to water or organic solvents.
5). Hydroxypropyl Methylcellulose In Plastics
In plastics, it can act as the release agent for shape formation, softeners and lubricants.
6). In PVC (Polrvinyl Chloride)
In the production of PVC, it can act as the dispersing agent and is a main additive in producing PVC by suspension polymerization.
7). In Other Industries
The products can also be widely used in leather, paper products, preservation of fruits and vegetables and textile industry.
8). In the Pharmaceutical Industry
It can be used as coating materials, membrane materials, speed-control polymer materials for sustained-release preparation, stabilizers, suspending agents, tablet adhesives and tackifying agents.
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