Децилдифенилфосфит

Description

Decyldiphenylphosphite is a phosphorous acid ester, a mixed alkyl aryl phosphite formed by a decyl (C10) and two phenyl radicals. There was no data in the input dump for this product, so the information below is collected from open sources by CAS number and English name.

Basic Attributes

• Chemical formula: C22H31O3P
• Molecular weight: 374.45
• Synonyms: decylphenylphosphite, diphenyldecylphosphite, phosphoric acid - decyldiphenyl ether, trade names Ferro 904, Irgafos DDPP, Stavinor DPDP

Scope of application

Like other alkyldiphenylphosphites, decyldiphenylphosphite is used as a color stabilizer and process stabilizer in the processing of thermoplastics - polycarbonate, polyurethanes, ABS plastics, polyesters and polyphenylene oxide, and also as a secondary stabilizer in PVC-based compositions and paint coatings. Phosphite stabilizers of this type prevent thermal-oxidative and photo-oxidative destruction of the polymer during processing on high-temperature equipment (extrusion, injection molding), oxidizing to the corresponding phosphates and binding hydroperoxide radicals formed in the polymer matrix under the influence of heat and light.

Chemical properties

As a trivalent compound of phosphorus (III), decyl diphenyl phosphite is easily oxidized by atmospheric oxygen to phosphate, and is also hydrolyzed in the presence of moisture to form phenol and the corresponding phosphoric acids - these reactions underlie its antioxidant effect in plastic processing: the phosphite group reduces hydroperoxides to less reactive alcohols, breaking the chain reaction of oxidative destruction of the polymer.

Storage and transportation

Store in original sealed containers, in a dry place, protected from moisture and direct sunlight - phosphites are sensitive to hydrolysis and oxidation during long-term storage in air. Transport in unopened containers that prevent contact with water. The molecular weight of 374.45 and the formula C22H31O3P are used in identifying the substance and calculating the dosage of the stabilizer in the formulations of polymer compositions, where the typical content of phosphite stabilizers is from 0.1 to 0.5 mass percent. The mixed alkylaryl structure of the molecule - a combination of one aliphatic decanoyl and two aromatic phenyl substituents at the phosphorus atom - ensures the compatibility of the stabilizer with both polar and non-polar polymer matrices. The lack of information about melting points, boiling points and hazard indicators in open sources is typical for specialized polymer additives, supplied primarily according to the manufacturer’s technical specifications, and not according to publicly available reference books. The related alkyldiphenylphosphites, isodecyldiphenylphosphite and dodecyldiphenylphosphite, differ in the length of the alkyl radical and are used in the same classes of polymers with a slightly different balance of volatility and compatibility with the polymer matrix.