Tributyl Phosphate

Tributyl phosphate is a plasticizer and/or solvents for cellulose esters, lacquers, plastic and vinyl resins. It is used as a solvent extractant of rare earth metals from ores. It is used as a heat exchange media. It is also used as a pigment grinding assistant and antifoam agent. This is an organic phosphor compound, which forms stable, hydrophobic complexes with metals such as uranium. The produced complexes dissolve easily in organic solvents and supercritical CO2.

Tributyl Phosphate, is a clear, water-white, high boiling liquid. It is an effective solvent, and is used in blending of material which are difficult to dissolve. This characteristic makes Tributyl phosphate an excellent solvent for use in graphic inks and in the preparation of concentrates for use as agricultural herbicides and fungicides. It can also be used as a solvent for material gums and synthetic resins. Tributyl phosphate is also used for solvent extraction, sometimes called liquid-liquid extraction, of numerous rare earth metals. It is used as a sole agent or in combination with other chemicals for the extraction of uranium from its ores. As an efficient antifoam agent, Tributyl phosphate has no residual odour, which makes it ideal for use in paper and protective coatings. Tributyl phosphate is utilized, for example, as a defoamer in vinyl latex emulsions, rubber-based paints, casein, inks, protein- or resin-based adhesives, and textile sizings. Normally, less that 1% by weight addition is sufficient to prevent undesirable foaming. Used with a small amount of isopropanol or similar material, tributyl phosphate will destroy or prevent foam in most detergent solutions. In anti-freeze solutions of the ethylene glycol-borax type, tributyl phosphate sharply reduces foaming. It is similarly useful in the manufacture and packaging of latex paints and some floor polishes. In other applications, it is and antifoaming agent for concrete, and a defoamer and corrosion inhibitor in chromium plating.

Tributyl phosphate has been used to improve the wetting ability of mercerizing liquids and the film strength of lubricating oils. Its relatively high phosphorous content, along with good solvency, permits use in adhesives for veneer plywood applications.

Molecula Formula: C6H15O3P
CAS Number: 126-73-8
Synonyms: tri-n- Butyl phosphate; TBP