Antioxidant aromatic fluorophosphites
Organic materials normally subject to gradual degradation in the presence of oxygen are stabilized by inclusion of an aromatic fluorophosphite having at least one benzene group bonded through oxygen to phosphorus and at least one fluorine atom bonded directly to the same phosphorus. Stabilization is improved by also including a conventional phenolic antioxidant. Many of the aromatic fluorophosphites are new compounds.
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Claims
1. An aromatic fluorophosphorus compound suitable for use as an antioxidant said compound being selected from fluorophosphorus compounds having the structure:
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
Other references
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Patent History
Patent number: RE36128
Type: Grant
Filed: Jun 13, 1991
Date of Patent: Mar 2, 1999
Assignee: Albemarle Corporation (Richmond, VA)
Inventor: Lester P. J. Burton (Wilmington, DE)
Primary Examiner: Donald G. Daus
Law Firm: Connolly + Hutz
Application Number: 7/714,441
Type: Grant
Filed: Jun 13, 1991
Date of Patent: Mar 2, 1999
Assignee: Albemarle Corporation (Richmond, VA)
Inventor: Lester P. J. Burton (Wilmington, DE)
Primary Examiner: Donald G. Daus
Law Firm: Connolly + Hutz
Application Number: 7/714,441
Classifications
Current U.S. Class:
Halogen (524/118);
Two Or More Phosphorus Atoms Directly Or Indirectly Bonded Together By Only Covalent Bonds (524/121);
Halogen (524/149);
Phosphorus Containing (544/214);
The Ring Phosphorus Is Attached Directly To Halogen Or An Acyclic Nitrogen By Nonionic Bonding (558/84);
Nitrogen Or Halogen Attached Directly To The Phosphorus By Nonionic Bonding (558/195)
International Classification: C08L 2332; C07F 9146;
International Classification: C08L 2332; C07F 9146;