Method of preparing an anionic polymerization initiator
AssigneeBridgestone Corporation
InventorsWilliam L. Hergenrother, John M. Doshak
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Abstract
A vulcanizable elastomeric compound and products such as pneumatic tires and the like, are formed from a functionalized polymer having a functional group derived from the polymerization initiator. The polymerization initiator is selected from the group consisting of ##STR1## where R.sup.1 and R.sup.2 are the same or different and are selected from the group consisting of alkyls having from 1 to about 12 carbon atoms, cycloalkyls having from 3 to about 14 carbon atoms, and aryls having from 6 to about 20 carbon atoms. Methods of the present invention include preparing the initiator, preparing functionalized polymers and, reducing the hysteresis of vulcanizable elastomeric compounds.
Claims8
A method of preparing an anionic polymerization initiator comprising the step of:
- reacting an organolithium compound with a phenylamine compound by forming a solution comprising from about 0.9 to about 1.1 moles of said phenylamine compound per 1 mole of said organolithium compound in an anhydrous aprotic solvent, wherein said phenylamine compound is selected from the group consisting of ##STR12## where R.sup.1 and R.sup.2 are the same or different and are selected from the group consisting of alkyls having from 1 to about 12 carbon atoms, cycloalkyls having from 3 to about 14 carbon atoms, and aryls having from 6 to about 20 carbon atoms;
- and X is a halogen, wherein X is replaced by a lithium atom.
Dependencies are inferred from the claim text.