Basf Se Corporation

Ciba Corporation

Walid Al-Akhdar

Sai Ping Shum

Ulrich Berens

Bruno Rotzinger

Roswell Easton King

Kai-Uwe Schoening

Franz Niklaus Windlin

Holger Ganz

Cinzia Tartarini

Alexander Dichtl

The invention relates to a compound of the formula (I-1) whereinn is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 or 25, R, R, R, R, R, R', R&#x2032;, R&#x2032;, R&#x2032;and R&#x2032;are each independently from each other H or C-C-alkyl. Compounds of the formula (I-1) or stabilizer mixtures containing compounds of the formula (I-1) are especially used for stabilization of polymers against degradation by oxidation, heat or light.

Polyglycol bis-[3-(7-tert-butyl-2-oxo-3-phenyl-3H-benzofuran-5-yl-)propanoyl] derivatives as stabilizers of organic material

A method of purifying an organic diphosphite of general formula (I)  The method comprises providing a crude organic diphosphite of general formula (I) that is at least partly dissolved in a first solvent (L1), wherein (L1) is selected from the group consisting of alkylbenzenes, aryl alkyl ethers, chlorobenzene, and mixtures thereof, and precipitating by admixing with a second solvent (L2) selected from the group consisting of linear C-C-alkanols, ethylene glycol di(C-C-alkyl) ethers, and mixtures thereof, and separating off the precipitated organic diphosphite from the solvents.

Method of purifying organic diphosphite compounds

The present invention provides for liquid antioxidant mixtures of octylated/butylated diphenylamine, phenothiazine and octadecyl (3,5-di-tert-butyl-4-hydroxyphenyl)-propionate. The antioxidant mixtures are useful for polyurethane stabilization.

Liquid antioxidant mixtures

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Oberwil, Switzerland

Walid Al-Akhdar