Isostearic acid

Alkoxy titanium acylate derivatives coordinated with a phosphite diester (phosphonate diester) can be prepared by reaction of a tetraalkyl titanate and an equal molar amount of a carboxyUc acid, such as methacrylic acid or isostearic acid, and a phosphite or phosphonate diester, such as dibutyl hydrogen phosphite (103). These materials reduce the viscosity of a composite system, improve... 

When tallow fatty acids are the feed, stearic acid (actually 60/40 C16/C18) and oleic acids are the products. Solvent separation is also used to separate stearic acid from isostearic acid when hydrogenated monomer is the feed, and oleic acid from linoleic acid when using tall oil fatty acids as feed. 

Branched-chain acids contain at least one branching alkyl group attached to the carbon chain, which causes the acid to have different physical, and in some cases different chemical, properties than their corresponding straight-chain isomers. For example, stearic acid has a melting point of about 69°C, whereas isostearic acid has a melting point of about 5°C. Some properties of commercial branched-chain acids are shown in Table 1 (1,2). 

Isostearic acid is produced from dimerization and reduction of monomeric acids (6). 

Branched-chain acids have a wide variety of industrial uses as paint driers (7), vinyl stabilizers (8), and cosmetic products (9). Cobalt and manganese salts of 2-ethyIhexanoic acid and neodecanoic acid are used as driers for paint, varnishes, and enamels litbium, magnesium, calcium, and aluminum salts of 2-ethyIhexanoic acid are used in the formation of greases and lubricants (see Driers and metallic soaps). Derivatives of isostearic acid have been used as pour point depressants in two-cycle engine oils, as textile lubricants, and in cosmetic formulations. Further industrial appHcations can be found (10). 

The clay-cataly2ed iatermolecular condensation of oleic and/or linoleic acid mixtures on a commercial scale produces approximately a 60 40 mixture of dimer acids and higher polycarboxyUc acids) and monomer acids (C g isomerized fatty acids). The polycarboxyUc acid and monomer fractions are usually separated by wiped-film evaporation. The monomer fraction, after hydrogenation, can be fed to a solvent separative process that produces commercial isostearic acid, a complex mixture of saturated fatty acids that is Hquid at 10°C. Dimer acids can be further separated, also by wiped-film evaporation, iato distilled dimer acids and trimer acids. A review of dimerization gives a comprehensive discussion of the subject (10). 

A similar reaction occurs with fatty acids (such as stearic acid) or methyl stearate, which undergo isomerization, cracking, dimerization, and oligomerization reactions. This has been used to convert solid stearic acid into the more valuable liquid isostearic acid [102] (Scheme 5.1-70). The isomerization and dimerization of oleic acid and methyl oleate have also been found to occur in chloroaluminate(III) ionic liquids [103]. 

Isostatic molding, 18 300 Isostatic refractory pressing, 21 504 Isostearic acid, physical properties, 5 35t Isotachophoresis, 9 738, 742, 748 Isotacticity, of polypropylene, 20 529 Isotactic PB resins, thermal properties of, 20 417... 

MO-5 acids, and isostearic acid, all of which melted below 45°. Water infiltrated sandy soil treated with these compounds within 4 hr and through clay containing soil within 8 hr, confirming their hydrophilic nature. The blending of these diamides into the tallow derivatives in order to lower melting points and enhance solubility causes... 

Isostearic Acid Dow Corning 531 Fluid Dow Corning 536 Fluid Kerosene... 

Is a liquid ester derived from isostearic acid that exhibits excellent oxidation and color stability. It has unique emollient, lubricating and w/o emulsification properties. 

Imiquimod is an immune response modifier. Each gram of the 5% cream contains 50 mg of imiquimod in an off-white oil-in-water vanishing-cream base consisting of isostearic acid, cetyl alcohol, stearyl alcohol, white pret-rolatum, polysorbate 60, sorbitan monostearate, glycerin,... 

Oleo-Keratin ISO. [Brooks Industries] AMP-isostearoyl hydrolyzed keratin, isostearic acid, myristyl myristate, isopropyl palmitate cosmetics ingredient... 

Priosorine. [Unichema] Isostearic acid or isostearyl alcohol emulsifier for es-tm/soBps textile softener, antistat an ticotiosion additive for sl care emulsions, sunscreen pr. ... 

EINECS 220-336-3 Isooctadecanoic acid Isostearic acid 16-Methylheptadecanoic acid 16-methylheptadecanoic acid Emersol 871 Proto-Lan IP Prisorine 3608 Imwitor 780K. Mixture of branched chain 18 carbon aliphatic acids used in cosmetics, chemicals, dispersant, softener in rubber compounds, food packaging, suppositories and ointments. Liquid d = 0.96-0.98 viscosity = 700-900 mPa s HLB=3.7 acid no = 3 max iodine no = 10 max sapon no = 240-260 LDeo (rat orl) >6 g/kg. Degussa-Huls Corp. Henkel/Emery Nissan Chem. ind. Unichema Union Camp. 

D EINECS 250-178-0 Emersol 871 Emersol 875 Emery 871 Emery 875D Halmaric MKH(R) Isooctadecanoic acid Isostearic acid EX Prisorine 3601 Prisorine 3502 Prisorine 3508 Unimac 5680. 

Isostearic acid, sorbitan ester (2 1) Sorbitan, diisooctadecanoate Sorbitan diisostearate. Auxiliary emulsifier, solubilizer, corrosion inhibitor in lubricants, metal protectants and cleaners, emulsion polymerization. Henkel/Emery. 

Isopropyl isostearate Isostearic acid, isopropyl ester 1-Methylethyl isooctadecanoate NIktol IPIS 2-Propyl isooctadecanoate Wickenol 131. Lubricant, emollient, solubilizer. CasChem. 

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