Cyclic pyrophosphites and compositions stabilized therewith

Details Cyclic pyrophosphites and compositions stabilized therewith Cyclic pyrophosphites and compositions stabilized therewith

C - Chemistry, Metallurgy

07

F

C07F 9/6578 (2006.01) C07F 9/547 (2006.01) C07F 9/6574 (2006.01) C08K 5/527 (2006.01) C08K 5/529 (2006.01)

Patent

CA 2172112

Novel cyclic pyrophosphites of formula I Image (I) are prepared from the corresponding 6-chloro and 6-oxo phosphepins or phosphocins. The cyclic pyrophosphites are effective processing stabilizers for organic materials subject to oxidative, thermal or light-induced degradation, particularly polyolefins and especially polypropylene.

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