Methyl ester ethoxylates composition

This chapter first examines the ethoxylation of esters and the composition of methyl ester ethoxylates. Important aspects related to the formulation of... 

Even at a lessened tendency to gel formation, methyl ester ethoxylates are influenced by the same compositional factors as other ethoxylates. As shown in Figs. 9 and 10, increasing carbon chain length and ethylene oxide content increases their tendency to form gels. 

The impact of molecular structure on the ability of methyl ester ethoxylates to lower interfacial tension has been examined elsewhere [14]. These studies show that the relative performance of methyl ester and alcohol ethoxylates and the impact of ethylene oxide content and distribution depend strongly on the composition of the soil used to determine the in-terfadal tension. 

Based on the surface property data discussed earlier, methyl ester ethoxylates would be expected to perform similarly to alcohol ethoxylates, which is indeed the case. As shown in Fig. 13, methyl ester ethoxylates are comparable to alcohol ethoxylates, as well as other commonly used surfactants (see Table 1), in their ability to remove soil from fabric. Compositional variables affect the performance of methyl ester ethoxylates and alcohol ethoxylates. Lauryl range and tallow range methyl ester ethoxylates provide the best detergency, while optimal ethylene oxide content appears to depend on soil/ cloth-type (Fig. 14). Interaction with other surfactants also affects detergency performance. As shown in Fig. 15, methyl ester ethoxylates act synergistically with alcohol ethoxylates, while the opposite can be observed with alcohol sulfate and alcohol ether sulfate. 

Hama, L, Samasoto, H., Okamoto, T. 1997. Influence of catalyst structure on direct ethoxylation of fatty methyl esters over Al-Mg composite oxide catalyst. J. Am. Oil Chem. Soc. 74 817-822. 

Hreczuch, W. 2002. Temperature-related reaction kinetics and product composition of ethoxylated fatty acid methyl esters. J. Chem. Technol. Biotechnol. 77 511-516. 

Variations in methyl ester purity or composition (unsaturation, carbon chain length distribution, etc.) do not appear to influence the ethoxylation reaction or overall ethoxylate quality. The purity of the methyl ester, however, does appear to impact color. A yellow-tinted methyl ester logically yields a yellow-tinted ethoxylate. 

Synonyms BIS-MA 2-methyl-2-propenoic acid (i-methylethylidene)di-4,i-phenylene ester Bisphenol A dimethacrylate 4,4 -isopropylidenediphenol dimethacrylate Bisphenol a dimethacrylate, ethoxylated Uses in dental restorative composite and adhesive materials A... 

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