Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus esters
Patent
1997-06-02
1999-01-05
Ambrose, Michael G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Phosphorus esters
C07F 9141, C07F 948
Patent
active
058565507
ABSTRACT:
Described are compositions comprising (a) 25 to 99% of organic phosphite or phosphonite, based on the total weight of the composition, (b) an effective stabilizing amount of organic amine, and (c) an effective stabilizing amount of acid-binding metal salt, wherein said composition comprises no organic polymers or alkali metal phosphates as further components, as well as a process for stabilising organic phosphites or phosphonites against hydrolysis by addition of organic amine and acid-binding metal salt. The compositions are distinguished by their excellent stability to hydrolysis and have good storage stability even at high atmospheric humidity. The novel compositions and process products can be used with advantage as stabilisers for organic material against the harmful action of heat, oxygen and/or light.
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Linhart Helmut
Pauquet Jean-Roch
Quotschalla Udo
Salathe Ronald
Zingg Jurg
Ambrose Michael G.
Ciba Specialty Chemicals Corporation
Hall Luther A. R.
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