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Sucrose fatty esters

K. Tachikawa, J. Sasaki, H. Asano, and S. Nakata, Glycosyl sucrose fatty esters enzymic manufacture, JP Patent 2002105193 Chem. Abstr., 136 (2002) 278508. [Pg.290]

In a detersive system containing a dilute surfactant solution and a substrate bearing a solid polar soil, the first effect is adsorption of surfactant at the soil-bath interface. This adsorption is equivalent to the formation of a thin layer of relatively concentrated surfactant solution at the interface, which is continuously renewable and can penetrate the soil phase. Osmotic flow of water and the extrusion of myelin forms follows the penetration, with ultimate formation of an equilibrium phase. This equilibrium phase may be microemulsion rather than liquid crystalline, but in any event it is fluid and flushable from the substrate surface. This phase change effect explains the detersive behavior of sucrose fatty esters in admixture with alkylarenesulfonates (117). [Pg.3148]

Fig. 8 Preferred substitution positions for sucrose fatty esters and examples for sucrose polysaccharides... Fig. 8 Preferred substitution positions for sucrose fatty esters and examples for sucrose polysaccharides...
Sucrose fatty esters could be prepared by reacting sucrose with fatty acid esters (interesterification) in a solvent (DMF, DMSO) or emulsion process (propylene glycol). Most interesting - because it avoids hazardous solvents - is the melt process where sucrose and the fatty acid ester (e.g. methyl) are reacted together without any solvent. ... [Pg.278]

Ganem-Quintanar A, Quintanar-Guerrero D, Falson-Rieg F, Buri P (1998) Ex vivo oral mucosal permeation of lidocaine hydrochloride with sucrose fatty acid esters as absorption enhancers. Int J Pharm 173 203-210... [Pg.105]

Sucrose is predominantly associated with the food industry, but it does have industrial uses in other areas. Sucrose fatty acid esters are a mixture of mono, di, and tri esters of sucrose with fatty acids. These are use in cosmetics, shampoos, resins, inks, paper processing, and pesticides. Sucrose benzoate is used as an emulsifier and in nail polishes. Sucrose has also been used in making glues and treating leather. [Pg.270]

Fatty acid esters would be predicted to have little irritation or toxic effects. Ex vivo permeability studies conducted in porcine buccal mucosa showed significant permeation enhancement of an enkephalin from liquid crystalline phases of glycerine monooleate [32]. These were reported to enhance peptide absorption by a cotransport mechanism. Diethylene glycol monoethyl ether was reported to enhance the permeation of essential oil components of Salvia desoleana through porcine buccal mucosa from a topical microemulsion gel formulation [33]. Some sucrose fatty acid esters, namely, sucrose laurate, sucrose oleate, sucrose palmitate, and sucrose stearate, were investigated on the permeation of lidocaine hydrochloride [34], with 1.5% w/v sucrose laurate showing a 22-fold increase in the enhancement ratio. [Pg.207]

Once bearing some substituents, the decrease of polarity of the sucrose derivatives makes them soluble in less-polar solvents, such as acetone or tert-butanol, in which some lipases are able to catalyze esterifications. Unlike proteases, which necessitate most often the use of an activated acyl donor (such as vinyl or trifluoroethyl esters), lipases are active with simple esters and even the parent carboxylic acids in the presence of a water scavenger. The selectivity of the lipase-catalyzed second esterification is specific for OH-6 allowing the synthesis of mixed T,6 -diesters.123,124 For some lipases, a chain-length dependence on the regiochemistry was observed.125 Selectively substituted monoesters were thus prepared and studied for their solution and thermotropic behavior.126,127 Combinations of enzyme-mediated and purely chemical esterifications led to a series of specifically substituted sucrose fatty acid diesters with variations in the chain length, the level of saturation, and the position on the sugar backbone. This allowed the impact of structural variations on thermotropic properties to be demonstrated (compare Section III.l).128... [Pg.230]

Critical micellar concentrations (CMCs) of sucrose fatty acid esters have been determined by various methods, for mixtures and for pure derivatives (Table III).95,126,390 395 Studies on the lyotropic properties of sucrose... [Pg.262]

Scheme 43. Sucrose fatty acid esters as emulsifiers. Scheme 43. Sucrose fatty acid esters as emulsifiers.
The use of sucrose fatty acid esters of low degree of substitution as emulsifiers has been detailed in the surfactant section. They are referenced as E 473 in the European system of food additives, whereas E 472 refers to sucroglycerides. [Pg.268]

V. Molinier, P. J. J. Kouwer, J. Fitremann, A. Bouchu, G. Mackenzie, Y. Queneau, and J. W. Goodby, Self-organizing properties of monosubstituted sucrose fatty acid esters The effects of chain length and unsaturation, Chem. Eur. J., 12 (2006) 3547-3557. [Pg.277]

K. Wada, K. Onuma, T. Ushikubo, and T. Ito, Process for preparing sucrose fatty acid esters. Patent EP 275939 (1988) Chem. Abstr. 110 (1989) 173962v. [Pg.288]

A. S. Muller, J. Gagnaire, Y. Queneau, M. Karaoglanian, J. P. Maitre, and A. Bouchu, Winsor behaviour of sucrose fatty acid esters Choice of the cosurfactant and effect of the surfactant composition, Colloids Surf., A 203 (2002) 55-66. [Pg.289]

T Polat, HG Bazin, RJLinhardt. Enzyme catalyzed regioselective synthesis of sucrose fatty acid ester surfactants. J Carbohydr Chem 16 1319-1325, 1997. [Pg.226]

The additives used were anionic, amphoteric and nonionic surfactants, sucrose fatty acid esters (S1670, S970, S370),... [Pg.274]

Sodium Lignosulfonate Sucrose Fatty Acid Esters Sugar Beet Fiber Vitamin K... [Pg.1028]

Sucrose fatty acid esters can be produced by esterification of fatty acids with sucrose, usually in a solvent system. The HLB varies, depending on the number of fatty acids ester-ified to a sucrose molecule. Monoesters have an HLB value greater than 16, triesters less than 1. When the level of esterification increases to over five molecules of fatty acid,... [Pg.334]

Finally, an elegant example of a product derived from renewable raw materials is the bioemulsifier, marketed by Mitsubishi, which consists of a mixture of sucrose fatty acid esters. The product is prepared from two renewable raw materials - sucrose and a fatty acid - and is biodegradable. In the current process the reaction is catalysed by a mineral acid, which leads to a rather complex mixture of mono- and di-esters. Hence, a more selective enzymatic esterification (Fig. 1.43) would have obvious benefits. Lipase-catalysed acylation is possible [126] but reaction rates are very low. This is mainly owing to the fact that the reaction, for thermodynamic reasons, cannot be performed in water. On the other hand, sucrose is sparingly soluble in most organic solvents, thus necessitating a slurry process. [Pg.35]


See other pages where Sucrose fatty esters is mentioned: [Pg.536]    [Pg.85]    [Pg.558]    [Pg.297]    [Pg.11]    [Pg.536]    [Pg.85]    [Pg.558]    [Pg.297]    [Pg.11]    [Pg.451]    [Pg.33]    [Pg.248]    [Pg.25]    [Pg.272]    [Pg.31]    [Pg.33]    [Pg.225]    [Pg.225]    [Pg.451]    [Pg.207]    [Pg.261]    [Pg.261]    [Pg.268]    [Pg.457]    [Pg.457]    [Pg.457]    [Pg.374]    [Pg.1945]   
See also in sourсe #XX -- [ Pg.11 ]




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