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:
Dec. 02, 2003
Filed:
Aug. 01, 2002
J. Todd Aplin, Baton Rouge, LA (US);
Charles H. Kolich, Baton Rouge, LA (US);
W. Dirk Klobucar, Baton Rouge, LA (US);
Kimberly A. Maxwell, Baton Rouge, LA (US);
Albemarle Corporation, Richmond, VA (US);
Abstract
A batch process for the anionic polymerization of a styrenic monomer is described. The process brings together a liquid saturated hydrocarbon diluent, an ether promoter, an organolithium initiator and a styrenic monomer in such a way so as to maintain the reaction mixture at or below about 55° C. and so that the amount of organolithium initiator employed is in the range of about 1 to about 10 mol %, based upon the total amount of styrenic monomer to be added. Favorable polydispersity and molecular weight polymer characteristics are obtained.