Polyethylene Glycol

Polyethylene glycols (PEGs) are condensation polymers of ethylene oxide and mono ethylene glycols or diethylene glycol with the general formula H(OCH2CH2)nOH. They are the most commercially important type of polyether. The low molecular weight compounds up to 700 are colorless, odorless viscous liquids with a freezing point from -10˚C (diethylene gycol), while polymerized compounds with higher molecular weight than 1,000 are wax like solids with melting point up to 67 °C for n=180. While PEGs with different molecular weights find use in different applications and have different physical properties (e.g. viscosity) due to chain length effects, their chemical properties are nearly identical.

I.C.C manufactures a wide range of Polyethylene Glycols. 

PEG 200

Polyglycol 200.

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PEG 300

Polyglycol 300.

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PEG 400

Polyglycol 400.

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PEG 600

Polyglycol 600.

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PEG 1500

Polyglycol 1500.

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PEG 4000

Polyglycol 4000.

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Polyglycol 200 Ph

PEG 200 Ph

Polyglycol 200 Ph

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The numbers that are often included in the names of PEGs indicate their average molecular weights, e.g. a PEG with n=9 would have an average molecular weight of approximately 400 and would be labeled PEG 400. Most PEGs include molecules with a distribution of molecular weights, i.e. they are polydisperse. PEGs are soluble in water, methanol, benzene, dichloromethane and is insoluble in diethyl ether and hexane. Polyethylene glycols are non-toxic, odorless, neutral, lubricating, nonvolatile and nonirritating and are used in a variety of industrial applications such as adhesives, ceramic, pulp and paper, metalworking, lubricants, agrochemicals, detergents and cleaners.

·         Polyethylene glycols are used in ceramic industry as carrier, binder and plasticizer. They are distributed easily in ceramic mixture to provide excellent lubrication and increase the strength. Due to Polyethylene glycols are non-toxic, there is no problem during firing operations.

·         Polyethylene Glycols are used as plasticizers to increase the lubrications and as humectants in adhesives to maintain wet-track strength. Water soluble Polyethylene glycols are used in aqueous emulsions of PVA to produce water resistant adhesives.

·         Polyethylene glycols could be used in polishes, soaps and detergents due to water solubility and inactivity toward other ingredients. The low-toxicity of them is a great advantage. They could also be used as viscosity modifiers in detergent formulations.

·         Polyethylene glycols are water soluble and good solubilizes for naturally derived insecticides. Actually they are carriers for plant hormones and herbicides. They are also used as an excipient in pesticide and insecticide formulations. Polyethylene glycols are humectants and so they are used as anti-dusting agents in formulations.

·         Polyethylene glycols are rolling agents in metalworking. They are also used in the formulations of cutting fluids, grinding fluids and in polishing compounds. Soldering fluids which are formulated using Polyethylene glycols speared easily on the surfaces also washed easily, so there is no residue after charring.

·         Polyethylene glycols are water soluble and low volatile. So they are used extensively in lubricants in metal working, plastic and rubber and textile industry.

·         Polyethylene glycols are used in the formulation of polyester resins and alkyd resins to improve the water dispersibilty in these resins. Polyethylene glycols are also used in the formulation of coatings which are water removable.

·         Polyethylene glycols are used as humectants, solvent. Lubricant, and dye carrier in ink formulations.

·         Polyethylene glycols are used as lubricant and mold release agent in synthetic and natural rubbers. After usage they can be easily removed from the surfaces by water.

·         Liquid polyethylene glycols are used as softeners in papers. They also used to impart flexibility and slip characters, and also preventing from swelling in humid weather. Solid polyethylene glycols are added as ingredients in paper coating compositions to prepare gloss and smoothness in paper. Polyethylene glycols are also used as stabilizers and plasticizers in paper industry.

·         Polyethylene glycols are lubricants, antistatic agent and softener in textiles. Most of the time esters of polyethylene glycols are used as finishing aids and processing aids in weaving, spinning and knitting of fibers and yards.

·         Polyethylene glycols are used for dimensional stabilization of wood without shrinking, cracking and drying. Soaking of woods in polyethylene glycol solutions can facilitate cutting and wood working operations.