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:
Oct. 23, 2007
Filed:
Sep. 22, 2004
Carl L. Willis, Houston, TX (US);
Daniel E. Goodwin, Katy, TX (US);
Grant W. Haddix, Katy, TX (US);
Pierre N. Tutunjian, Houston, TX (US);
Joy P. Cocchiara, Houston, TX (US);
Harvey E. Atwood, Kingwood, TX (US);
Craig A. Stevens, Katy, TX (US);
Carl L. Willis, Houston, TX (US);
Daniel E. Goodwin, Katy, TX (US);
Grant W. Haddix, Katy, TX (US);
Pierre N. Tutunjian, Houston, TX (US);
Joy P. Cocchiara, Houston, TX (US);
Harvey E. Atwood, Kingwood, TX (US);
Craig A. Stevens, Katy, TX (US);
Kraton Polymers U.S. LLC, Houston, TX (US);
Abstract
Disclosed is an anionic diinitiator prepared using a diisopropenyl benzene compound and an organo lithium compound having primary polymerization sites. The anionic diinitiators are prepared by admixing a diisopropenyl benzene compound with diethyl ether, ethylene, an organo lithium compound, and a solvent under reaction conditions sufficient to prepare a diinitiator having primary lithium alkyl reactive sites. The diinitiators are particularly useful in preparing block copolymers.