Antioxidant aromatic fluorophosphites

- Albemarle Corporation

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.

Skip to:  ·  Claims  ·  References Cited  · Patent History  ·  Patent History

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
1892990 January 1933 Linner
1972599 September 1934 Perkins
2008032 July 1935 Niederi
2202877 June 1940 Stevens
2313782 March 1943 Taylor
2315556 April 1943 Soday
2364338 December 1944 Beaver
2394754 February 1946 D'Alello
2469469 May 1949 Kluge
2479948 August 1949 Luten
2538355 January 1951 Davis
2714120 July 1955 Kehe
2807653 September 1957 Filbey
2836577 May 1958 Kolka
2836609 May 1958 Kolka
2905674 September 1959 Filbey
3014950 December 1961 Birum
3060121 October 1962 Orloff
3062896 November 1962 Davis
3065275 November 1962 Goddard
3069348 December 1962 Coffield
3093587 June 1963 Ecke
3146273 August 1964 Orloff
3254050 May 1966 Baranauchas
3281506 October 1966 Shepard
3330859 July 1967 Dexter
3367980 February 1968 Zaweski
3449441 June 1969 Dewhurst
3475520 October 1969 Mitsch
3531483 September 1970 Gilles
3562338 February 1971 Zaweski
3702878 November 1972 Saito
4032602 June 28, 1977 Mazour
4094855 June 13, 1978 Spivak
4136041 January 23, 1979 Lenack
4233207 November 11, 1980 Spivak
4259492 March 31, 1981 Rasberger
4362830 December 7, 1982 Minagawa
4374219 February 15, 1983 Spivack
4522735 June 11, 1985 Chasar
4867907 September 19, 1989 Burton
4929745 May 29, 1990 Burton et al.
4962144 October 9, 1990 Babillis
5049691 September 17, 1991 Burt et al.
5061818 October 29, 1991 Burton
5136075 August 4, 1992 Burt et al.
5278209 January 11, 1994 Kliecka
5342869 August 30, 1994 Stoll
5688847 November 18, 1997 Gelbin
Foreign Patent Documents
1159078 December 1983 CAX
398574 September 1973 SUX
787412 January 1979 SUX
859369 January 1980 SUX
Other references
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