Layered double hydroxides carboxylates

Keywords sodium carboxylate, halide, layered double hydroxide, carboxylate alkylation, microwave irradiation... 

Carlino, S. (1997). The intercalation of carboxylic acids into layered double hydroxides a critical evaluation and review of the different methods. Solid State Ionics 98, 73. 

Such layered double hydroxides can also serve as hosts for guests, such as carboxylates, sulfates, phosphates, porphyrins, and polyoxometallates that can be put in by anion exchange.85... 

A. Laskowska, M. Zaborski, G. Boiteux, O. Gain, A. Marzec, W. Maniukiewicz, Effects of unmodified layered double hydroxides MgAl-LDHs with various structures on the properties of filled carboxylated acrylonitrile-butadiene rubber XNBR, European Polymer Journal, ISSN 0014-3057 60 (November 2014) 172-185. http //dx.doi.0rg/lO.lOl6/j. eurpolymj. 2014.09.013. 

C. Nyambo, P. Songtipya, E. Manias, M. M. Jimenez-Gasco, and C. A. Wilkie, Effect of MgAl-layered double hydroxide exchanged with linear alkyl carboxylates on fire-retardancy of PMMA and PS. Journal of Materials Chemistry, 18 (2008), 4827-38. 

The monomer solution makeup involves addition and solubilization of elemental sulfur and rosin (substituted diterpenes) in the chloroprene monomer. The water solution is made in a second vessel. Deionized water, sodium hydroxide, and a dispersant are mixed to form the water solution. The dispersant is a condensation product of naphthalene-sulfonic acid and formaldehyde. The monomer and water solutions are mixed with centrifiigal pumps to form an oil-in-water emulsion. The emulsion formed by virtue of formation of the sodiiun salt of rosin and resin components (abietic and dehydroabietic acids) having hydrophobic and hydrophilic ends. The large carbon-bearing portion of sodium abietate is hydrophobic and thereby solubilizes the monomer. The sodium carboxylate portion of sodium abietate is the hydrophilic end that extends into the aqueous phase and forms the electronic double layer that is critical to emulsion stability (84,85). In the patent example, the emulsion was added to the reactor and the temperatiu-e was increased to 40°C polymerization temperatiu-e (Table 3). 

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