Alkyl trimethylammonium chloride

Toluhydroquinone and methyl er -butylhydroquinone provide improved resin color retention 2,5-di-t-butylhydroquinone also moderates the cure rate of the resin. Quaternary ammonium compounds, such as alkyl trimethylammonium chloride, are effective stabilizers in combination with hydroquinones and also produce beneficial improvements in color when promoted with cobalt octoate. Copper... 

Ruff et al. in a series of publications described the synthesis of amine complexes of aluminum hydride [32, 33]. Their study investigated the reaction of these materials with typical Lewis bases in order to define the conditions for the stability of aluminum hydride derivatives in which the aluminum atom exhibits a coordination number of five. They first described methods for making tertiary alkyl amine complexes of aluminum hydride utilizing lithium aluminum hydride and an amine hydrochloride. A finely ground lithium aluminum hydride was placed together with trimethylammonium chloride (ratio 1 2). They prepared other trialkylamine alanes and the N-dialkylaminoalanes, in a similar fashion. These adducts of alane were found to sublime readily at temperatures up to 40 °C except for the tri-n-propylamine alane, which sublimed very slowly and could also be recrystallized from hexane at — 80 °C. 

Ionic surfactants, such as sodium dodecyl benzene sulphonate (NaDBS) or cetyl-trimethylammonium chloride (CTAQ), adsorb on hydrophobic particles of agrochemicals, as a result of the hydrophobic interaction between the alkyl group of the surfactant and the particle surface. As a result, the particle surface will acquire a charge that is compensated by counter ions (Na+ in the case of NaDBS and Cl in the case of CTACl), forming an electrical double layer. 

Alkyl (C12-18) trimethylammonium chloride. See Alkyl trimethyl ammonium chloride... 

Isolation of benzylalkyldimethyl-ammonium, C12 and Cig alkyl-trimethylammonium and C 6 alkylpyridinium salts from water C 2 alkyltrimethylammonium chloride, C12 alkylpyridinium chloride, C12 benzylalkyldi-methylammonium chloride separation from each other and separation by alkyl chain length Fractionation of a quaternized triethanolamine Cift/Cig ester... 

Ethoxylated methylcarboxylates Propoxyethoxy glyceryl sulfonate Alkylpropoxyethoxy sulfate as surfactant, xanthan, and a copolymer of acrylamide and sodium 2-acrylamido-2-methylpropane sulfonate Carboxymethylated ethoxylated surfactants (CME) Polyethylene oxide (PEG) as a sacrificial adsorbate Polyethylene glycols, propoxylated/ethoxylated alkyl sulfates Mixtures of sulfonates and nonionic alcohols Combination of lignosulfonates and fatty amines Alkyl xylene sulfonates, polyethoxylated alkyl phenols, octaethylene glycol mono n-decyl ether, and tetradecyl trimethyl ammonium chloride Anionic sodium dodecyl sulfate (SDS), cationic tetradecyl trimethyl ammonium chloride (TTAC), nonionic pentadecylethoxylated nonylphenol (NP-15), and nonionic octaethylene glycol N-dodecyl ether Dimethylalkylamine oxides as cosurfactants and viscosifiers (N-Dodecyl)trimethylammonium bromide Petrochemical sulfonate and propane sulfonate of an ethoxylated alcohol or phenol Petrochemical sulfonate and a-olefin sulfonate... 

The helper effects of DOPE and cholesterol appear to be hydrocarbon chain-specific. This is demonstrated in studies of their mixtures with a series of alkyl acyl carnitine esters (alkyl 3-acyloxy-4-trimethylammonium butyrate chloride) tested with CV-1 cell culture (monkey fibroblast) [127]. The influence of the aliphatic chain length (n - 12-18) on transfection in vitro was determined using cationic liposomes prepared from these lipids and their mixtures with the helper lipids DOPE and cholesterol (Fig. 30). Both helper lipids provided for significant transfection enhancements in an apparently chain-specific manner, with the highest effects found for short-chain lipids with diC12 0 and diC14 0 chains in 1 1 mixtures with the respective helper lipid. 

Cationic surfactants. Cationic surfactants, frequently belonging to alkylpyridinum, alkyl-benzyldimethylammonium and trimethylammonium types, are conunonly determined in skin care cosmetics and hair and mouth formulations, using reversed-phase LC with UV, conductivity or RI detection. Thus, Benassi et al. (1989) developed a method to analyse cetylpyridinium chloride and alkylbenzyldimethyl chloride in cosmetic products (mouthwashes, dental products. ..) by reversed-phase LC. The necessary chromatographic conditions comprise a deactivated bonded-phase column and an acetonitrile/aqueous phosphate in acid pH solution as a mobile phase. LC analysis of multicomponent het-erophasic matrixes, such as cosmetic products, drugs and foods, has been studied by Bettero et al. (1990). Ci2 i6 alkylbenzyldimethylammonium homologues were separated using UV detection after dilution in a tetrahydrofuran water solution. 

As mentioned above, several types of PMO were synthesized using different templates and different reaction conditions. So, surfactant molecules are an important factor for the synthesis of PMOs and their numerous apphcations. The surfactants employed can be divided as shown in Figure 3.8. Ionic surfactants generally include C12-C18 alkyl chains with trimethylammonium head groups such as CTAB and octadecyltrimethylammonium chloride (OTAC). Nonionic surfactants consist of alkyl polyether type molecules such the Brij surfactants and the triblock copolymers such as Pluronic PI23 and FI27. 

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