US 7,550,537 B2
	Organo-dilithium compound and process for preparing the same
Carl L. Willis, Houston, Tex. (US); Daniel E. Goodwin, Katy, Tex. (US); Grant W. Haddix, Katy, Tex. (US); Pierre N. Tutunjian, Houston, Tex. (US); Joy P. Cocchiara, Houston, Tex. (US); Harvey E. Atwood, Kingwood, Tex. (US); and Craig A. Stevens, Katy, Tex. (US)
Assigned to Kraton Polymers U.S. LLC, Houston, Tex. (US)
Filed on Oct. 22, 2007, as Appl. No. 11/876,596.
Application 11/876596 is a continuation of application No. 10/947011, filed on Sep. 22, 2004, granted, now 7,285,596.
Claims priority of provisional application 60/505670, filed on Sep. 24, 2003.
Prior Publication US 2008/0111256 A1, May 15, 2008
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 25/02 (2006.01)

U.S. Cl. 525—242  [556/51; 556/52; 525/332.9]

4 Claims

1. An organo-dilithium compound prepared by a process comprising admixing one or more of the same or different diisopropenyl benzene compounds having the general formula: wherein R1 has the general formula: and R3 is an aliphatic, cycloaliphatic, aromatic or alkyl-substituted aromatic hydrocarbon radical having from 1 to about 20 carbon atoms, each n is independently an integer having a value from 1 to 10, and R2 is hydrogen or an alkyl or cycloalkyl radical containing from 1 to 6 carbon atoms, 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.