Polyalkylene ether glycols

Adiprene [Du Pont], TM for a polyurethane rubber, the reaction product of diisocyanate and polyalkylene ether glycol. In its raw polymer form, it is a liquid of honey-like color and consistency, which is compounded chemically (to polymerize it further) and converted into products by casting and other techniques. 

TEEEs are typically produced by condensation polymerization of an aromatic dicarboxylic acid or ester with a low MW aliphatic diol and a polyalkylene ether glycol. Reaction of the first two components leads to the hard segment, and the soft segment is the product of the diacid or diester with a long-chain glycol. This can be described as a melt transesterification of an aromatic dicarboxylic acid, or preferably its dimethyl ester, with a low MW poly(alklylene glycol ether) plus a short-chain diol. ... 

Thermoplastic copolyester elastomers are generally block copolymers produced from short-chain aliphatic diols, aromatic diacids, and polyalkylene ether-diols. They are often called polyesterether or polyester elastomers. The most significant commercial product is the copolymer from butane-1,4-diol, dimethyl terephthalate, and polytetramethylene ether glycol [25190-06-1/, which produces a segmented block copolyesterether with the following structure. 

The most common BW antifoam employed today is UCON 50-HB-5100, from Union Carbide Corporation, which is the linear POP(33), POE(45) ether of butyl alcohol, or polyalkylene glycol monobutylether (PAGMBE). 

Mehra (1) [Named after the inventor] A process for extracting particular hydrocarbons from natural or synthetic gas streams using solvent extraction into polyalkylene glycol dialkyl ethers. Invented in 1982 by Y. R. Mehra at the El Paso Hydrocarbons Company, Odessa, TX. U.S. Patent 4,421,535. 

Immobilized Polvalkvlene Glvcols. Polyalkylene glycols and mono-methyl ethers of various molecular weights were heated at toluene reflux with both silica gel and alumina. Carbon analyses of the... 

Other Synthetic Fluids. Other synthetic fluids are used as heat-transfer fluids although most of them are not sold specifically for this purpose. Fluids that sometimes are used include diethylene glycol, triethylene glycol, propylene glycol, butyl carbitol, w -cymene, several silanes, several silicone fluids, some silicate fluids, other polyalkylene glycols, other oiganic ethers, and other molten salts. Fluidized solids also are used as heat-transfer media. 

Fic. 6.42. Absorbance spectra of wet and dry polyalkylene glycol ether (brake fluid) in the near infra-red region of the electromagnetic spectrum 5 ... 

Carom [Carbide aromatics extraction] A two-stage process for removing aromatic hydrocarbons from petroleum refining streams. In the first stage, the aromatics are removed by liquid-liquid extraction with a proprietary solvent (a mixture of polyalkylene glycols and a glycol ether) at ambient temperature. In the second stage, the aromatics are stripped from the solvent by steam distillation. Developed by Union Carbide Corporation first commercialized in 1986, and now licensed by UOP. Seven units had been licensed by 2002. 

Chemical lures impregnated with prey scent have been developed for different species of carnivorous fish. Lures for different game fish species are supposed to contain different chemicals, although usually not revealed on the labels of the products. The artificial lures are made of cellulose ether, a polyalkylene glycol, plasticizers, and other chemicals, and are impregnated with amino acids. 

Abstract The chemical nature and technology of the main synthetic lubricant base fluids is described, covering polyalphaolefins, alkylated aromatics, gas-to-liquid (GTL) base fluids, polybutenes, aliphatic diesters, polyolesters, polyalkylene glycols or PAGs and phosphate esters. Other synthetic lubricant base oils such as the silicones, borate esters, perfluoroethers and polyphenylene ethers are considered to have restricted applications due to either high cost or performance limitations and are not considered here. Each of the main synthetic base fluids is described for their chemical and physical properties, manufacture and production, their chemistry, key properties, applications and their implications when used in the environment. 

The ether linkages in polyalkylene glycols are responsible for the unique properties of these polymers. The carbon-oxygen bond of an ether is stronger at 351 kJ mol than the carbon-carbon bond of a hydrocarbon at 348 kJ mol and the electron-rich oxygen atoms offer many sites for co-ordination. Hydrogen... 

Fatty alcohol fatty acid ester Alkyl polyalkylene glycol ether... 

Chem. Descrip. Cl 8 alcohol polyalkylene glycol ether Uses Emulsifier for min. oils, wh. oils, textile aux., cosmetics, textile lubricants and finishes... 

Alkylbenzene sulfonate, paraffin sulfonate, secondary alkanesulfonate, soap, ethoxylated alcohol sulfate, alcohol-sulfate, dialkyldiphenylether disulfonate Ethoxylated phenol, ethoxylated alcohol, amine oxide, alkanolamide, alkyl polyglucoside, alkyl polyalkylene glycol ether Phosphate, carbonate, bicarbonate, silicate, citrate, gluconate, polyacrylate, EDTA-salt, phosphonate Alcohol, alcohol glycol ether, pine oil, rt-limonene Sodium/potassium hydroxide, alkanol-amine, ammonia, magnesium hydroxide Sodium xylenesulfonate, sodium cumene sulfonate, dialkyldiphenylether disulfonate... 

Ethers (end-groups) of such mixed polyalkylene glycols are named analogously to the post-treated (modified) polymers ... 

There is a series of polymers having a chemical structure — [(CHR) —O— which are derived as polyacetal resins, and are known as polyalkyene oxides or polyalkylene glycols. In the above structure, the polymer with R=H and M = 1 is polyoxymethylene, which is known as Delrin. This material is a high polymer of formaldehyde, which is terminated by an ether or ester function added to stabilize the final product. Other manufactured products include copolymers with ethylene oxide or propylene oxide. The IR and Raman spectra of polyoxymethylene are shown in Reference Spectrum 55. A strong peak at 1098 cm and a doublet at 936 and 900 cm in the IR spectrum are assigned to the C—O—C stretching vibration. It is not possible to determine if the sample is a homopolymer or copolymer from this spectrum. 

Glycidyl ethers of polyalkylene glycols are low viscosity epoxy resins that are useful as reactive diluents for conventional BPA epoxy resins. Their aliphatic ether backbone structure improves flexibility, elongation and impact resistance. However, heat, solvent, water, chemical and corrosion resistance are reduced. They are therefore frequently employed as a modifier rather than the sole binder. 

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