01 Hydroxypropyl Methyl Cellulose
1. Cement mortar: Improve the dispersion of cement-sand, greatly improve the plasticity and water retention of mortar, have an effect on preventing cracks, and enhance the strength of cement.
2. Tile cement: improve the plasticity and water retention of pressed tile mortar, improve the adhesion of tiles, and prevent chalking.
3. Coating of refractory materials such as asbestos: as a suspending agent, fluidity improving agent, and also improves the bonding force to the substrate.
4. Gypsum coagulation slurry: improve water retention and processability, and improve adhesion to the substrate.
5. Joint cement: added to joint cement for gypsum board to improve fluidity and water retention.
6. Latex putty: improve the fluidity and water retention of resin latex-based putty.
7. Stucco: As a paste to replace natural products, it can improve water retention and improve the bonding force with the substrate.
8. Coatings: As a plasticizer for latex coatings, it can improve the operability and fluidity of coatings and putty powders.
9. Spraying paint: It has good effect on preventing the sinking of cement or latex spraying materials and fillers and improving fluidity and spray pattern.
10. Secondary products of cement and gypsum: used as an extrusion molding binder for cement-asbestos and other hydraulic substances to improve fluidity and obtain uniform molded products.
11. Fiber wall: Due to the anti-enzyme and anti-bacterial effect, it is effective as a binder for sand walls.
12. Others: It can be used as a bubble retaining agent for thin clay sand mortar and mud hydraulic operators.
02. Hydroxyethyl methylcellulose
1. In pharmaceuticals, it is used as a hydrophilic gel skeleton material, porogen, and coating agent for the preparation of sustained-release preparations. It can also be used as a thickening, suspending, dispersing, binding, emulsifying, film-forming, and water-retaining agent for preparations.
2. Food processing can also be used as, adhesive, emulsifying, film-forming, thickening, suspending, dispersing, water-retaining agent, etc.
3. In the daily chemical industry, it is used as an additive in toothpaste, cosmetics, detergents, etc.
4. Used as gelling agent for cement, gypsum and lime, water-retaining agent, and excellent admixture for powder building materials.
5. Hydroxymethylcellulose is widely used as an excipient in pharmaceutical preparations, including oral tablets, suspensions and topical preparations.
Its properties are similar to methyl cellulose, but due to the presence of hydroxyethyl cellulose, it is easier to dissolve in water, the solution is more compatible with salt, and has a higher coagulation temperature.
03. Carboxymethyl cellulose
1. Used in oil and natural gas drilling, well digging and other projects
① CMC-containing mud can make the well wall form a thin and firm filter cake with low permeability, reducing water loss.
② After adding CMC to the mud, the drilling rig can get a low initial shear force, so that the mud can easily release the gas wrapped in it, and at the same time, the debris can be quickly discarded in the mud pit.
③ Drilling mud, like other suspensions and dispersions, has a certain shelf life. Adding CMC can make it stable and prolong the shelf life.
④ The mud containing CMC is rarely affected by mold, so it must maintain a high pH value, and it is not necessary to use preservatives.
⑤ Contains CMC as a treatment agent for drilling mud flushing fluid, which can resist the pollution of various soluble salts.
⑥ CMC-containing mud has good stability and can reduce water loss even if the temperature is above 150°C.
CMC with high viscosity and high degree of substitution is suitable for mud with low density, and CMC with low viscosity and high degree of substitution is suitable for mud with high density. The choice of CMC should be determined according to different conditions such as mud type, region, and well depth.
2. Used in textile, printing and dyeing industries. In the textile industry, CMC is used as a sizing agent for light yarn sizing of cotton, silk wool, chemical fiber, blended and other strong materials;
3. Used in paper industry CMC can be used as paper smoothing agent and sizing agent in paper industry. Adding 0.1% to 0.3% of CMC in the pulp can increase the tensile strength of the paper by 40% to 50%, increase the crack resistance by 50%, and increase the kneading property by 4 to 5 times.
4. CMC can be used as a dirt adsorbent when added to synthetic detergents; daily chemicals such as toothpaste industry CMC glycerol aqueous solution is used as toothpaste gum base; pharmaceutical industry is used as a thickener and emulsifier; CMC aqueous solution is used as a float after thickening Mining and so on.
5. It can be used as adhesive, plasticizer, suspending agent of glaze, color fixing agent, etc. in the ceramic industry.
6. Used in construction to improve water retention and strength
7. Used in the food industry. The food industry uses CMC with a high degree of replacement as a thickener for ice cream, canned food, instant noodles, and a foam stabilizer for beer. Thickener, binder.
8. The pharmaceutical industry chooses CMC with appropriate viscosity as the binder, disintegrating agent of tablets, and suspending agent of suspensions, etc.
04. Methylcellulose
Used as a thickener for water-soluble adhesives, such as neoprene latex.
It can also be used as a dispersant, emulsifier and stabilizer for vinyl chloride and styrene suspension polymerization. MC with DS=2.4～2.7 is soluble in polar organic solvent, which can prevent the volatilization of solvent (dichloromethane ethanol mixture).
Post time: Jan-05-2023