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:
Jan. 07, 2014
Filed:
Dec. 19, 2011
David John Lohse, Bridgewater, NJ (US);
Nikos Hadjichristidis, Athens, GR;
Andy Haishung Tsou, Allentown, PA (US);
Pamela J. Wright, Easton, PA (US);
Suzzy Chen Hsi Ho, Princeton, NJ (US);
Paul Edward Schuenzel, Morris Plains, NJ (US);
David John Lohse, Bridgewater, NJ (US);
Nikos Hadjichristidis, Athens, GR;
Andy Haishung Tsou, Allentown, PA (US);
Pamela J. Wright, Easton, PA (US);
Suzzy Chen Hsi Ho, Princeton, NJ (US);
Paul Edward Schuenzel, Morris Plains, NJ (US);
ExxonMobil Research and Engineering Company, Annandale, NJ (US);
Abstract
A process for making a substantially saturated dendritic hydrocarbon polymer. The process has the following steps: (a) polymerizing an amount of a first alkadiene monomer under anionic conditions in the presence of a first organic monolithium initiator to produce a linear polyalkadiene having a lithiated chain end; (b) reacting the linear polyalkadiene with an amount of a second organic monolithium initiator in the presence of tetramethylethylene diamine to form a multilithiated polyalkadiene; (c) reacting the multilithiated polyalkadiene with an amount of a second alkadiene monomer to form a branched polyalkadiene; (d) repeating steps (b) and (c) with the branched polyalkadiene one or more times to prepare a dendritic polyalkadiene; and (e) hydrogenating the dendritic polyalkadiene to form the substantially saturated dendritic hydrocarbon polymer.