Results 241 to 250 of about 32,605 (302)
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Nonionic Fluorosilicone Surfactants
Journal of Colloid and Interface Science, 1993Abstract New fluorosilicone surfactants have been prepared. The focus has been on branched disiloxane and trisiloxane hydrophobes having 3,3,3-trifluoropropyl and 3,3,4,4,5,5,6,6,6-nonafluorohexyl radicals with poly(oxyethylene) hydrophiles. Their performance as aqueous surfactants was evaluated and compared to conventional methylsiloxane surfactants
Hideki Kobayashi, Michael J. Owen
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Nonionic surfactants from fluoroalkenes
Journal of Fluorine Chemistry, 1985Abstract Perfluorinated alkenes obtained by degradation of PTFE [1] are easily attacked by nucleophiles. The reaction with poly(oxyethylenes) yields nonionic fluorosurfactants [2]: The F-nonionics I (RH) were transformed into the corresponding sulfates by sulfatation with chlorosulfonic acid.
Jürgen Schulze, Dietrich Prescher
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Nonionic Surfactants: An Overview
Tenside Surfactants Detergents, 2010Abstract Nonionic surfactants do not produce ions in aqueous solution. As a consequence, they are compatible with other types of surfactants and are excellent candidates to enter complex mixtures, as found in many commercial products. Nonionic surfactants are found today in a large variety of domestic and industrial products, such as ...
D. Bajpai, V. K. Tyagi
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Journal of the American Oil Chemists' Society, 1978
AbstractOver one billion pounds of nonionic surface‐active agents are produced per year in the U.S. alone. The oxyethylene derivatives of alcohols and alkylphenols account for 71% of this production. Methods of making these surfactants, along with descriptions of their properties and main uses in various detergents, are described.
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AbstractOver one billion pounds of nonionic surface‐active agents are produced per year in the U.S. alone. The oxyethylene derivatives of alcohols and alkylphenols account for 71% of this production. Methods of making these surfactants, along with descriptions of their properties and main uses in various detergents, are described.
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2017
Distribution of the polyoxyethylene chain polyoxyethylene alkylphenols polyoxyethylene alcohols polyoxyethylene esters of fatty acids polyoxyethylene mercaptans polyoxyethylene alkylmines nonionic surfactants containing an amide group polyol ester surfactants nonionics as intermediate for ionic surfactants.
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Distribution of the polyoxyethylene chain polyoxyethylene alkylphenols polyoxyethylene alcohols polyoxyethylene esters of fatty acids polyoxyethylene mercaptans polyoxyethylene alkylmines nonionic surfactants containing an amide group polyol ester surfactants nonionics as intermediate for ionic surfactants.
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Novel nonionic siloxane surfactants
Applied Organometallic Chemistry, 1992AbstractA new method for ethoxylation without application of pressure is described. Butynediololigo(oxyethylene) [H(OCH2CH2)nOCH2CCCH2O(CH2CH2O)nH with n=1–16] has been prepared in the presence of an electrophilic catalyst in a specially developed reciruculating apparatus. The products have been characterized by NMR and IR spectroscopy.New nonionic
R Wersig, G Sonnek, C Niemann
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Clouding of nonionic surfactants
Current Opinion in Colloid & Interface Science, 2016Nonionic surfactants have broad applications such as cleaning and dispersion stabilization, which frequently are hampered by strong temperature sensitivities. As manifested by clouding and decreased solubility with increasing temperature, the interaction between water and the oligo(oxyethylene) head-groups is becoming less favorable.
Lindman, Bjorn +2 more
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Competitive Adsorption of Nonionic Surfactant and Nonionic Polymer on Silica
Langmuir, 2007Competitive adsorption of the nonionic polymer poly(ethylene oxide) (PEO) and the nonionic surfactant of the type poly(ethylene oxide) alkyl ether from aqueous solutions on a silica surface is examined. From one-component solutions, both species readily adsorb onto silica and, in the bulk of mixed (two-component) solutions, polymer-surfactant complexes
Postmus, B.R. +3 more
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2000
Structure and nomenclature of surface-active alkyl glucosides synthesis of alkyl glucosides and alkyl polyglucosides chemical properties and derivatization of surface-active alkyl glucosides and alkyl polyglucosides surfactant properties analytical chemistry of alkyl polyglucosides ecology toxicology and dermatology application.
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Structure and nomenclature of surface-active alkyl glucosides synthesis of alkyl glucosides and alkyl polyglucosides chemical properties and derivatization of surface-active alkyl glucosides and alkyl polyglucosides surfactant properties analytical chemistry of alkyl polyglucosides ecology toxicology and dermatology application.
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Biodegradation of nonionic surfactants
Journal of the American Oil Chemists' Society, 1984AbstractThis paper discusses the biodegradability of alcohol‐based nonionics measured by the recommended legislative test procedures and how the results obtained are affected by the chemical structure of the surfactant, and thus provides guidance on the selection of materials.
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