Aluminum stearate

Octadecanoic acid aluminum salt stearic acid aluminum salt. 

Aluminum stearate should be stored in a well-closed container in a cool, dry, place. It is stable under ordinary conditions of use and storage. 

Emollient emulsion stabilizer gelling agent opacifier stabilizing agent. 

Aluminum stearate is mainly used in microencapsulation and in the manufacture of ointments. It is also used in cosmetics such as mascara, moisturizers, and sunscreens. 

It should be noted that aluminum stearate can also refer to the distearate (CAS number [300-92-5]) and the monostearate (CAS number [7047-84-9]) in addition to the tristearate. The distearate exhibits the same excipient properties as the tristearate and is used in similar pharmaceutical applications. However, the monostearate is more widely used in cosmetics as a colorant. 

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Defoamers (qv) are frequentiy needed for salty muds, although in very small quantities. A common defoamer is aluminum stearate [637-12-7]. 

This group of aluminum carboxylates is characterized mainly by its abiUty to gel vegetable oils and hydrocarbons. Again, monocarboxylate, dicarboxylate, and tricarboxylate salts are important. The chemical, physical, and biological properties of the various types of aluminum stearates have been reviewed (29). Other products include aluminum palmitate and aluminum 2-ethylhexanoate (30). 

The second type of eyeliner is a soft crayon, in pencil form, that deUvers mass with minimal pressure. Products of this type may contain as much as 70% talc, 5% pigment, and 5% aluminum stearate. The Hpid portion may include squalene [111-02-4] and alkanolamides. 

Cellulose acetate Silica gel Scoured wool Sawdust Rayon waste Fluorspar Tapioca Breakfast food Asbestos fiber Cotton linters Rayon staple Starch Aluminum hydrate Kaolin Cryolite Lead arsenate Cornstarch Cellulose acetate Dye intermediates Calcium carbonate White lead Lithopone Titanium dioxide Magnesium carbonate Aluminum stearate Zinc stearate Lithopone Zinc yellow Calcium carbonate Magnesium carbonate Soap flakes Soda ash Cornstarch Synthetic rubber... 

Fatty-acid soaps Alkali, alkaline earth, and other metal soaps sodium stearate aluminum stearate Gear oils paper stock paper sizing glue solutions... 

Suspension of water soluble solids in oil can be achieved by a variety of chemical additives. Chemical suspension additives that have been suggested include alkyl mercaptophosphonic acids(174), organophylic clay plus hydroxypropyl cellulose(175), polyols(176), aluminum stearate(177), organophylic clay plus surfactant(178-181), aluminum phosphate esters(182), and acrylate copolymers(183-184). 

Dampproofing admixtures are formulated to affect the properties of the hardened concrete, and not those of concrete in its plastic state. In the case of materials based solely on calcium and aluminum stearates, stearic acid in solid or emulsion form, bitumens and hydrocarbon resins, there will be no effect on the properties of the plastic concrete with regard to air content, workability, mix design parameters, etc. When water-reducing admixtures or accelerators are included in the formulation, the effect on the concrete will be a function of the particular type of material used (see relevant section). The wax emulsions do appear to have an effect on the properties of the plastic concrete because of the lubrication effect of the very small... 

During WWII, the British used a thickened fuel called Fras which was prepared by digestion of aluminum stearate with gasoline at 50—55°(120—130°F), but this material was not as good as Napalm and more difficult to prepare (Ref 7)... 

Hydrocortisone Cortril Aluminum stearate, beeswax, pentaerythritol cocoate, petrolatum, propylene glycol... 

The structure of the wax crystal may also be controlled to some extent by the addition of substances to the oil, either before dilution with solvent or before the oil-solvent mixture is cooled. A number of materials, including aluminum stearate (9), colloidal substances of the type of bitumen (52), and highly polymerized or condensed high molecular weight paraffins (10), have been proposed as wax crystal regulators. Obviously the use of such materials will be an added expense (and will require equipment for their application). Unless a major improvement is realized, their use is not warranted however, in some cases, regulation of the crystal may be required and the use of wax crystal regulators may be justified. 

Aluminum Stearate. See under Stearates Aluminum Stearate Gels. See under Stearates Aluminum Triethyl. Same as Triethyl Aluminum Aluminum Tripropyl. Same as Tripropyl Aluminum... 

The next structural formula illustrates the course of a transesterification which proceeds smoothly and quickly if it is catalyzed with soluble aluminum salts found in the reaction medium, for instance, with basic aluminum stearate. In contrast to the conventionally catalyzed transesterifications by alkali alcoholate, the presence of free carboxylic acid does not have a negative effect. The catalyst... 

The anion is irrelevant for the catalysis. However, it participates in the reaction by producing ester. This fact confirms the correctness of the proposed reaction mechanism under discussion. If, for instance, w-butyl benzoate reacts with 2-ethylhexanol in the presence of a large quantity of basic aluminum stearate, distinctly detectable quantities of 2-ethylhexyl stearate can be found in the reaction product, and an equivalent amount of benzoic acid is found in the filtered aluminum precipitate. 

Stearate Aluminum stearate AfiCuH O , yellowish-white powder, by reaction of aluminum hydroxide suspended in hot H20. shaken with stearic acid, and then drying the pioduct. used (1) as a thickenei for lubricating oils, (2) as a drier for paints and varnishes, (3) in waterproofing textiles, paper, leather, (4) as a gloss for paper,... 

Stearic acid is used (1) in the preparation of metallic stearates, such as aluminum stearate for thickening lubricating oils, for waterproofing materials, and for varnish driers, (2) in the manufacture of "stearin candles, and is added in small amounts to paraffin wax candles. As the... 

Aluminum Stearate (or Aluminum tristearate). Al(C18H3502)(Ref2), Al(Cl8H3s02)1>5 (Ref 3), A1(C18H3502)3 (Refs 1 6) mw 313.51 to 877.35 white powder mp 115°, 117—20°(separate values) d 1.065g/cc at 30° (specific gravity 1.070). Sol in alkali, petr, turpentine oil insol in ethanol, ether and w. Forms a gel with aliphatic and aromatic hydrocarbons. Prepn is by reaction in an aq soln of A1 hydroxide, A1 or activated (with Hg chloride in methanol) A1 metal with stearic acid or Na stearate. The reaction product is filtered and dried. CA Registry No [637-12-7]... 

C.M. Cawley et al, Aluminum Stearate Gels for Use as Flame-Thrower Fuels , JInstPetr 33, 721-55 (1947) CA42, 3572 (1948)... 

W. Gallay I.E. Puddington, The Composition of Aluminum Stearate , CanJRes 26B,... 

It is believed that the conflicting study results are due to differences in the lubricant used to retard surface oxidation during milling (Dinman 1987). Stearic acid is the most commonly used lubricant in the aluminum industry the stearic acid combines with the aluminum to form aluminum stearate. Exposure to the aluminum stearate does not appear to be fibrogenic to workers (Crombie et al. 1944 Meiklejohn and Posner 1957 Posner and Kennedy 1967). In contrast, the previous and now discontinued use of a nonpolar aliphatic oil lubricant, such as mineral oil, has been associated with fibrosis (Edling 1961 McLaughlin et al. 1962 Mitchell etal. 1961 Ueda etal. 1958). 

Toluene Toluene Toluene 20% w/v petroleum resin none 20% w/v petroleum resin none 20% w/v aluminum stearate 10% w/v aluminum stearate L = 12.9 D11 L = 10 D2-2 L = 49D1-75... 

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