C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 75/08 (2006.01) C07C 41/46 (2006.01) C08K 5/00 (2006.01) C08K 5/1539 (2006.01)
Patent
CA 2176288
Described are compositions protected against thermal and oxidative degradation, comprising A) a polyether polyol or mixtures of such polyols, B) at least one benzofuranone derivative of formula I Image (I), wherein either two of R1, R7, R8, R9 and R10 are each independently of the other C1-C4alkyl or C1-C4alkoxy, the others being hydrogen, or R7 to R10 are hydrogen, or at most two of these radicals are each independently of the other methyl or methoxy, and R1 is -O-CHR3-CHR5-O-CO-R6, R2 and R4 are each independently of the other hydrogen or C1-C6alkyl, R3 is hydrogen or C1-C4alkyl, R5 is hydrogen, phenyl or C1-C6alkyl, and R6 is C1-C4alkyl, C) at least one compound from group of the phenolic antioxidants, and/or D) at least one compound from group of the amino antioxidants of the secondary amine type. Polyurethane and polyurethane foams prepared therefrom are also protected against thermal and oxidative degradation, in particular against discoloration and core scorching.
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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