The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2018
Filed:
Jun. 29, 2015
Applicant:
Chemtura Corporation, Middlebury, CT (US);
Inventor:
Robert G Rowland, Woodbridge, CT (US);
Assignee:
LANXESS Solutions US Inc., Middlebury, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M 133/12 (2006.01); C07C 209/68 (2006.01); C10M 177/00 (2006.01); C07C 211/55 (2006.01);
U.S. Cl.
CPC ...
C10M 133/12 (2013.01); C07C 209/68 (2013.01); C07C 211/55 (2013.01); C10M 177/00 (2013.01); C10M 2215/064 (2013.01); C10N 2230/10 (2013.01);
Abstract
Liquid diphenylamine compositions comprising predominately p,p'-di-alkylated diphenylamines and low amounts of mono-alkylated diphenylamines are prepared by adding an olefin to a mixture comprising mono-alkylated diphenylamines, di-alkylated diphenylamines, Lewis acid catalyst and an amount of another olefin sufficient to suppress dealkylation of the alkylated diphenylamines.