Robert T Cordova

US Patent:

7297813, Nov 20, 2007

Filed:

Aug 5, 2004

Appl. No.:

10/912274

Inventors:

Gary Smith - Collegeville PA, US
Robert Cordova - Herrin IL, US
Johnson C. H. Chen - King of Prussia PA, US
Mabel Chen - West Chester PA, US

Assignee:

Arkema Inc. - Philadelphia PA

International Classification:

C07C 309/02
C07C 309/04
C07C 309/20
C07C 309/24
C07C 309/63

US Classification:

562124, 558 44

Abstract:

Methods of removing alkyl alkanesulfonate esters from aqueous or anhydrous compositions are provided. The invention provides methods for the conversion of alkyl alkanesulfonate esters of the formula RSOR′ to the corresponding acids of the formula RSOH. The alkyl alkanesulfonate esters are present in an organic medium, which may contain significant amounts of water or which may be anhydrous or substantially anhydrous. In some embodiments, the invention provides methods for purifying aqueous or anhydrous alkanesulfonic acids by removing alkyl alkanesulfonate esters.

US Patent:

8304477, Nov 6, 2012

Filed:

Jan 26, 2010

Appl. No.:

12/693700

Inventors:

Roswell E. King - Pleasantville NY, US
Stanley Padegimas - Mobile AL, US
Brian Bakke - Greensboro NC, US
Lucas Moore - Marietta GA, US
Sai P Shum - Monroe Township NJ, US
Robert Cordova - Madison WI, US

Assignee:

BASF SE - Ludwigshafen

International Classification:

C08K 5/00
C08K 5/51
C08K 5/524
C07F 9/145

US Classification:

524151, 524128, 524150

Abstract:

Disclosed are mixtures of oxyalkylene bridged bis- and tris-phosphite esters of formulae I and II.

US Patent:

8481726, Jul 9, 2013

Filed:

Jun 25, 2007

Appl. No.:

12/308595

Inventors:

Abdel-Ilah Basbas - Basel, CH
Davide Alvisi - Bondeno, IT
Robert Cordova - Madison WI, US
Michael Peter Difazio - Spanish Fort AL, US
Walter Fischer - Reinach, CH
Joseph A. Kotrola - Mobile AL, US
Tiziano Nocentini - Pistoia, IT
James Robbins - Satsuma AL, US
Kai-Uwe Schöning - Oberwil, CH

Assignee:

BASF SE - Ludwigshafen

International Classification:

C07D 211/94
C07D 401/12
C07D 401/14
C07D 403/12
C07D 403/14
C07B 43/00

US Classification:

544198, 544209, 546184, 546188, 546189

Abstract:

The present invention relates to a novel process for the preparation of specific sterically hindered nitroxyl ethers from their corresponding sterically hindered nitroxyl radicals by reacting it with an aldehyde and a hydroperoxide. This nitroxyl ether formation may be carried out from different starting nitroxyl radicals, which are subsequently further reacted to the desired compounds. The compounds prepared by this process are effective as stabilizers for polymers against harmful effects of light, oxygen and/or heat and as flame-retardants for polymers.