polyglycol

polyglycol

[′päl·i‚glī‚kȯl]
(organic chemistry)
A dihydroxy ether derived from the dehydration (removal of a water molecule) of two or more glycol molecules; an example is diethylene glycol, CH2OHCH2OCH2CH2OH.
References in periodicals archive ?
We also offer SERDOX[R] polyglycol ethers, SERDOLAMIDE[R] alkanolamides, andSERVOXYL[R] phosphate esters.
Fact: Polyglycol compressor fluids are generally blended with one of two types of 'Esters,' "Polyolesters" or "Diesters." These two differ drastically in their performance in a rotary screw air compressor.
The results obtained using different quantities of polypropylene glycol (Polyglycol) frother are indicated in the Fig.
According to the company, the product's main constituents are new patent pending block copolymers based on aminofunctional silicones and polyglycol. The silicone fluid segments arrange themselves in free-moving loops on the outside of the fabric and reduce friction between the fibers.
Kluber Lubrication has introduced Klubersynth GE 46-1200, a synthetic long-term gear grease for a variety of gear applications, and Klubersynth UH1 6 Series, a complete line of polyglycol gear oils available in ISO VG from 100-1,000 for a variety of industries.
9, when authorities discovered that 7,500 gallons of chemicals--mostly 4-methylcyclohexane methanol (MCHM) and PPH (polyglycol ethers), both used to clean coal--had leaked from an aging storage tank owned by Freedom Industries into the nearby Elk River.
The composition contains at least one active ingredient selected from the group consisting of triethylene glycol, dipropylene glycol, propylene glycol, triethanolarnine, and mixtures thereof, wherein at least one active ingredient reduces the partial pressure of malodorants; nonionic surfactant comprising a mixture of a hydrogenated castor oil surfactant and a polyglycol ether; quaternary ammonium salt; cosolvent selected from the group consisting of short chain monohydric alcohol; and water.
The Centers for Disease Control and Prevention (CDC) said that a storage tank that leaked a coal-cleaning chemical also contained a mixture of polyglycol ethers, or PPH.
Freedom Industries didn't report until Tuesday that a mixture of polyglycol ethers, or PPH, also entered the water system when the spill occurred.
In a typical synthesis of AACH precursors, 0.1 mmol of polyglycol (PEG)-20000 or polyglycol (PEG)-2000 was dissolved in 8mL deionized water to form a transparent solution, to which 15.0 g of Al[(N[O.sub.3]).sub.3] x 9[H.sub.2]O (Merck, 98.5%) was added under vigorous stirring.
Polyglycol ether was first introduced to poly(ethylene terephthalate) molecular chains by Du Pont Company, which had better hydrophilicity thus improving the dye ability of products (Hytrel).