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US 4,233,208 AGranted
Polymer compositions stabilized with hindered phenyl secondary phosphites
AssigneeCiba-Geigy Corporation
InventorJohn D. Spivack
Life of this patent
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Abstract
Organic polymeric materials normally subject to oxidative and ultraviolet light deterioration are stabilized by incorporating therein a compound of the formula ##STR1## wherein R is hydroxyl or chlorine, Y and Y' are independently alkyl, aralkyl or halogen, and Z is independently hydrogen, halogen, alkyl or aralkyl.
Claims26
Compositions comprising a polymer normally subject to deterioration stabilized with
- (a) 0.005 to 5% of a stabilizer having the formula ##STR8## wherein R is hydroxy or chlorine,
- Y and Y' are independently alkyl having from 1 to 12 carbon atoms or aralkyl having from 7 to 12 carbon atoms, and
- Z is independently hydrogen, halogen, alkyl having from 1 to 12 carbon atoms or aralkyl having from 7 to 12 carbon atoms.
Dependencies are inferred from the claim text.