polyethylene glycol PEG
Polyethylene glycol is a high molecular polymer, the chemical formula is HO(CH2CH2O )nH, non-irritating, slightly bitter taste, good water solubility, and good compatibility with many organic components. It has excellent lubricity, moisture retention, dispersibility, and adhesiveness. It can be used as antistatic agent and softener. It is used in cosmetics, pharmaceuticals, chemical fibers, rubber, plastics, papermaking, paint, electroplating, pesticides, metal processing and food It is widely used in processing and other industries.
Different properties depending on molecular weight, ranging from colorless, odorless viscous liquid to waxy solid. Those with a molecular weight of 200-600 are liquid at room temperature, and those with a molecular weight above 600 gradually become semi-solid. The properties vary with the average molecular weight. From colorless and odorless viscous liquid to waxy solid. As the molecular weight increases, its moisture absorption capacity decreases accordingly. This product is soluble in water, ethanol and many other organic solvents. Low vapor pressure, stable to heat, acid and alkali. Does not work with many chemicals. It has good hygroscopicity, lubricity and cohesiveness. Non-toxic and non-irritating.
The performance and application of polyethylene glycol are as follows:
1. Polyethylene glycol with a relatively low molecular weight can be used as a solvent, auxiliary Solvent, dispersant, o/w type emulsifier and stabilizer, used to make cement suspension, emulsion, injection, etc., also used as water-soluble ointment base and suppository base, solid waxy polyethylene glycol with high relative molecular weight is commonly used It is used to increase the viscosity and solidification of low molecular weight liquid PEG; for substances that are not easily soluble in water, this product can be used as a carrier of solid dispersant to achieve the purpose of solid dispersion. PEG4000 and PEG6000 are good coating materials and hydrophilic polishing materials , film and capsule materials, plasticizers, lubricants and pill bases for the preparation of tablets, pills, microcapsules, etc.
2, PEG-400, PEG-600, PEG-800 are used as cosmetics Substrate, lubricant and wetting agent for rubber industry and textile industry. Adding PEG-600 to the electrolyte in the metal industry can enhance the grinding effect and enhance the luster of the metal surface.
3, PEG4000, PEG6000 are used as excipients in industry, used as suppositories, Preparation of paste; used as a finishing agent in the paper industry to increase the gloss and smoothness of paper; used as an additive in the rubber industry to increase the lubricity and plasticity of rubber products, reduce power consumption during processing, and prolong the service life of rubber products .
4. Polyethylene glycol series products can be used as raw materials for ester surfactants .
5. PEG-200 can be used as a medium for organic synthesis and for those with higher requirements Heat carrier, used as humectant, inorganic salt solubilizer, viscosity regulator in daily chemical industry; used as softener and antistatic agent in textile industry; used as wetting agent in paper industry.
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