Oxyethylene unit mixtures

Polydocanol is a mixture of monoethers from dodecyl alcohol and Macrogols, which contains an average of 9 oxyethylene units and is used as a local anesthetic. As this mixture of substances is not UV active, visualization by derivatization is performed with a modified Dragendorff reagent ... 

A study of the wetting power of well-purified individual POE nonionics (Cohen, 1981) showed that individual surfactants of this type, C12H25(OC2H )cOH, are better wetting agents than a Poisson distribution mixture with the same average number of oxyethylene units. Temperature increase caused an increase in... 

Studies of the soil removal properties of polyoxyethylenated straight-chain primary alcohols on cotton and Dacron-cotton permapress fabric indicate that this detergency maximum with change in the number of oxyethylene units in the POE chain is also shown on these fabrics. In liquid no-phosphate formulations built only with diethanolamine to provide an alkaline pH, optimum removal of both sebum and clay soils from Dacron-cotton permapress at 49°C in 150 ppm hard water occurs with about 5, 9, and 10 oxyethylene units for POE C9-11, C12-15, and C16-18 alcohol mixtures, respectively. For removal of the same soils from cotton at the same temperature, the optimum POE chain lengths are about two oxyethylene units larger (Albin, 1973). 

Polyoxyl 40 stearate, Emerest 2672, Lipal 39S, Mapeg S 40, Myrj 52, Myrj 52S, Peg asperse 1750-iMS. Mixture of mono-snd distearate esters of polyoxyethylene and of free POE. The average number of oxyethylene units is 40. Waxy, white to light tan solid odorless or faint fat-like odor. So] in water, ale, ether, acetone. Insol in mineral oil, vegetable oils-... 

The phase behavior of mixtures of polyoxyethylene phytosterol surfactants and paraiSn as well as ternary mixtures of the surfactants, water, and paraiSn has also been studied [18]. The objective of this work was to find creamy mixtures to be used in topical preparations. Uchegbu et al. investigated the phase behavior of cholesterol with 24 oxyethylene units with free cholesterol and hexadecyldiglycerol in order to find phases that can be used as drug delivery systems [25]. No liquid crystalline phases were found. 

A mixture of Zonyl FSN, a nonionic fluorinated surfactant, and Tergitol NP-10, a nonionic hydrocarbon-type surfactant (nonylphenol with 10 oxyethylene units Union Carbide Corp.), exhibited surface tension synergism (Fig. 4.29). The dynamic surface tension of the 1 1 mixture is lower than the dynamic surface tension of the individual components. 

Petroleum spillages can be removed from water surfaces more efficiently with the following detergent mixture [1692], which contains mainly oxyethyl-ate fatty Cio to C20 alcohols and additional oxyethylated fatty Cn to Cyj acids with an oxyethylene chain length of one to two units. It is used in the form of an aqueous 20% to 25% emulsion, which is sprayed onto a contaminated surface. 

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