Alkylated 1,1'-biphenyl-2,2'-diyl phosphites and stabilized compositions

Patent 4196117 Issued on April 1, 1980. Estimated Expiration Date:

January 3, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3297631

3415906

3558554

3796684

Hindered phenyl phosphites Patent #: 4094855
Issued on: 06/13/1978
Inventor: Spivack

Inventor

Assignee

Ciba-Geigy Corporation

Application

No. 05/866748 filed on 01/03/1978

US Classes:

524/119, Two or more phosphorus rings252/400.24, Trivalent P (e.g., phosphorous acid, phosphites, etc.)524/117, Oxygen ring atom524/583, Organic NRM additive524/585, From ethylene as sole reactant monomer524/929, Natural rubber broadly disclosed, nonclaimed558/85, Acyclic divalent chalcogen single bonded directly to the ring phosphorus (e.g., cyclic phosphites, etc.)987/40, Two or more rings contain at least one P(O) group and wherein at least two P atoms in the two rings are bonded solely to O, or wherein the compound contains two P atoms in a single ring and all bonds of the P atoms are to O (includes spiro rings) (9/6574A6)987/41, P(O) group containing ring is part of a condensed or bridged carbocyclic ring system (9/6574A4)987/47, Two or more rings contain at least one P-O bond and wherein at least two P atoms in the two rings are bonded to S (includes spiro) (9/6571A6)987/48P(O) containing ring is part of a condensed or bridged ring carbocyclic system (9/6571A4)

Examiners

Primary: Taylor, Hosea E.
Assistant: White, R. A.

Attorney, Agent or Firm

Cavalieri; Vincent J.

International Classes

C08K 5/00 (20060101)
C08K 5/527 (20060101)
C08K 5/5398 (20060101)
C07F 9/00 (20060101)
C07F 9/6571 (20060101)
C07F 9/6574 (20060101)

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.