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US 5,620,939 AGranted
Initiative system
AssigneeThe Goodyear Tire & Rubber Company
InventorsAdel F. Halasa, Wen-Liang Hsu, David J. Zanzig, Paul H. Sandstrom, Steven K. Henning, Danielle Lucas
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Abstract
This invention reveals an initiator system which is comprised of (a) a lithium initiator, (b) a sodium alkoxide, and (c) a polar modifier; wherein the molar ratio of the sodium alkoxide to the polar modifier is within the range of about 0.1:1 to about 10:1; and wherein the molar ratio of the sodium alkoxide to the lithium initiator is within the range of about 0.01:1 to about 20:1.
Claims13
An initiator system which is comprised of (a) a lithium initiator, (b) a sodium alkoxide, and (c) a polar modifier;
- wherein the sodium alkoxide is of the formula NaOR, wherein R represents an alkyl group containing from about 2 to about 12 carbon atoms;
- wherein the lithium initiator is an organolithium compound of the formula R-Li, wherein R represents a hydrocarbyl radical containing from 1 to about 20 carbon atoms;
- wherein the molar ratio of the sodium alkoxide to the polar modifier is within the range of about 0.5:1 to about 1:1;
- and wherein the molar ratio of the sodium alkoxide to the lithium initiator is within the range of about 0.2:1 to about 3:1.
1 more element
Dependencies are inferred from the claim text.