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US 4,196,117 AGranted
Alkylated 1,1'-biphenyl-2,2'-diyl phosphites and stabilized compositions
AssigneeCiba-Geigy Corporation
InventorJohn D. Spivack
Life of this patent
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Abstract
Alkylated 1,1'-biphenyl-2,2'-diyl phosphiates are prepared by reacting alkylated 2,2'-biphenol with phosphorus trichloride in an organic solvent an then reacting the intermediate with an alcohol or a thiol. Said phosphites are useful as stabilizers of organic polymers and lubricating oils, especially as process stabilzers for polyolefins, polyesters and polycarbonates.
Claims23
A 1,1'-biphenylene phosphite of the formula ##STR7## wherein R is an alkyl group of 1 to 18 carbon atoms,
- R.sup.1 is hydrogen or an alkyl group of 1 to 18 carbon atoms and
- R.sup.2 is an alkyl group of 1 to 18 carbon atoms, phenyl, phenyl substituted with up to 3 alkyl groups each having 1 to 8 carbon atoms, or a group of the formula ##STR8## where R.sup.3 is a divalent hydrocarbyl group selected from alkylene, arylene or allylene, and X is oxygen or sulfur.
Dependencies are inferred from the claim text.