Process for preparation of dialkylphosphinic salts

Details Process for preparation of dialkylphosphinic salts Process for preparation of dialkylphosphinic salts

2004-12-17

2009-12-22

Zucker, Paul A (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus acids or salts thereof

Reexamination Certificate

active

07635785

ABSTRACT:
The invention relates to a process for preparation of salts of dialkylphosphinic acids, which comprisesa) reacting hypophosphorous acid and/or its salts with olefins in the presence of a free-radical initiator to give dialkylphosphinic acids and/or their alkali metal salts, in a solvent system, andb) reacting the dialkylphosphinic acids and/or alkali metal dialkylphosphinates obtained in a) with compounds of the metals Mg, Ca, Al, Zn, Ti, Sn, Zr, and/or Fe to give the dialkylphosphinic salts of these metals.The invention also relates to the use of the metal dialkylphosphinic salts obtained by the inventive process, in particular for preparation of flame retardants.

REFERENCES:
patent: 2957931 (1960-10-01), Hamilton et al.
patent: 3914345 (1975-10-01), Kleiner et al.
patent: 4036811 (1977-07-01), Noetzel et al.
patent: 4138433 (1979-02-01), Kleiner et al.
patent: 5780534 (1998-07-01), Kleiner et al.
patent: 6013707 (2000-01-01), Kleiner et al.
patent: 6096914 (2000-08-01), Seitz
patent: 6184405 (2001-02-01), Kleiner et al.
patent: 6207736 (2001-03-01), Nass et al.
patent: 6255371 (2001-07-01), Schlosser et al.
patent: 6270560 (2001-08-01), Kleiner et al.
patent: 6300516 (2001-10-01), Weferling et al.
patent: 6329544 (2001-12-01), Weferling et al.
patent: 6355832 (2002-03-01), Weferling et al.
patent: 6359171 (2002-03-01), Weferling et al.
patent: 6365071 (2002-04-01), Jenewein et al.
patent: 6420459 (2002-07-01), Horold
patent: 6503969 (2003-01-01), Klott et al.
patent: 6534673 (2003-03-01), Weferling et al.
patent: 6547992 (2003-04-01), Schlosser et al.
patent: 6716899 (2004-04-01), Klatt et al.
patent: 6753363 (2004-06-01), Harashina
patent: 7087666 (2006-08-01), Hoerold et al.
patent: 7148276 (2006-12-01), Bauer et al.
patent: 7259200 (2007-08-01), Bauer et al.
patent: 7420007 (2008-09-01), Bauer et al.
patent: 2004/0049063 (2004-03-01), Hoerold et al.
patent: 2005/0009941 (2005-01-01), Sicken et al.
patent: 2005/0101706 (2005-05-01), Bauer et al.
patent: 2005/0143503 (2005-06-01), Bauer et al.
patent: 2006/0074157 (2006-04-01), Bauer et al.
patent: 2100779 (1972-07-01), None
patent: 2447727 (1976-04-01), None
patent: 2827867 (1980-01-01), None
patent: 19614424 (1997-10-01), None
patent: 19734437 (1999-02-01), None
patent: 19820398 (1999-11-01), None
patent: 19820399 (1999-11-01), None
patent: 19904814 (2000-08-01), None
patent: 19920276 (2000-11-01), None
patent: 19933901 (2001-02-01), None
patent: 10241373 (2004-03-01), None
patent: 0699708 (1996-03-01), None
patent: 1024167 (2000-08-01), None
patent: 1024168 (2000-08-01), None
patent: 1055676 (2000-11-01), None
patent: 1070754 (2001-01-01), None
patent: 1396522 (2004-03-01), None
patent: 1396524 (2004-03-01), None
patent: 1479718 (2004-11-01), None
patent: 1522551 (2005-04-01), None
patent: 1544206 (2005-06-01), None
patent: WO 96/16948 (1996-06-01), None
patent: WO 98/13371 (1998-04-01), None
patent: WO 98/08898 (1998-05-01), None
patent: WO 98/20012 (1998-05-01), None
patent: WO 98/39381 (1998-09-01), None
patent: WO 98/45364 (1998-10-01), None
patent: WO 99/28327 (1999-06-01), None
US 6,248,921, 06/2001, Weferling et al. (withdrawn)
U.S. Appl. No. 11/182,459, by Bauer et al., filed Jul. 15, 2005.
U.S. Appl. No. 11/015,195, by Bauer et al., filed Dec. 17, 2004.
EPO Search Report for EP 04028905, mailed Apr. 11, 2005.
Co-pending U.S. Appl. No. 11/714,482; by Maas et al. filed Mar. 6, 2007.
Co-pending U.S. Appl. No. 11/714,481; by Maas et al. filed Mar. 6, 2007.
Co-pending U.S. Appl. No. 11/714,331; by Maas et al. filed Mar. 6, 2007.
EPO Search Report for EP 04028906, mailed Mar. 16, 2005.
Drinkard, “Some Salts of Symmetric Phosphic Acids”, Journal of the American Chemical Society, pp. 5520, 5521 (Nov. 1952).
German Office Action for DE 10359814.6, mailed Aug. 24, 2004.
E.E. Nifante'ev et al., “Journal of General Chemistry USSR” 50(8) pp. 1416-1423(1980).
Office Action for U.S. Appl. No. 11/015,195 dated Jun. 21, 2007.
EPO Search Report for EP 08009495, mailed Jul. 22, 2008.

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