Hydroxypropyl Cellulose for Wall Putty Application

Introduction of Hydroxypropyl Cellulose

Chemical Properties of Hydroxypropyl Cellulose
White or slightly yellow or gray granules or fibrous powder. Odorless and tasteless, combustible, thermoplastic. Dissolves in water into transparent to milky white viscous colloidal solution. Soluble in ethanol, insoluble in ether. Insoluble in water above 38℃.
Uses of Hydroxypropyl Cellulose
Emulsifier, film agent, protective colloid, stabilizer, suspending agent, thickener. In Japan, 70% of it is used in medicine as tablet binder and film coating. UsesPharmaceutical industry as binder and film-forming agent, in cosmetics, coatings, ink industry as film-forming agent, dispersant, stabilizer, thickener, etc.
1, used as adhesive: in the pharmaceutical field, this product is mainly used as a binder, such as tablets Chemicalbook, granules, fine particles of the binder, generally 1-5% of the weight of the agent, choose RT-L or RT-J type.
2, used as film coating materials for tablets, HPC has excellent film-forming properties, the resulting film is tough and elastic, can be compared with plasticizers, by mixing with other anti-temperature coating agents, can further improve the performance of the film. Generally use RT-L type.
3、It is used as thickener of elixir, Additive of detergent and stabilizer of emulsion. Generally RT-M type is used.
4、It can be used as skeleton material for the preparation of skeleton sustained-release tablets, sustained-release pills and double-layer sustained-release tablets, and RT-M type is generally used.
5、It can be used as gel agent in ethanol occasion and as ointment base.

Preparation method of Hydroxypropyl Cellulose
(1) Treatment of cellulose with alkali and propylene chloride;
(2) Treating wood pulp or lignin pulp with high concentration of sodium hydroxide impregnation to produce alkaline cellulose solution, filtering and pressing this solution to remove the excess sodium hydroxide, and then further reacting with propylene oxide to obtain it.

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(1)Polymers：Polymerisation is the process by which the repeating units that make up a polymer are linked together by covalent bonds.Polymers can exist in different states depending on the phase, conformation and arrangement of their molecular chains. The two main states are amorphous and crystalline. Polymers usually exist in a semi-crystalline form in which amorphous and crystalline phases coexist.

(2)Organic Raw Materials：It has a wide range of uses, which can be divided into three aspects: first, it is used as a raw material for the production of polymer chemical products, i.e., monomers for polymerisation reactions; second, it is used as a raw material for other organic chemical industries, including fine chemical products; and third, it is used as a solvent, refrigerant, antifreeze, and gas adsorbent. Basic organic chemical industry is the basis for the development of the production of various organic chemical products, is the main component of the modern industrial structure.