Process of preparing an amino thiazolyl disulfide using a water soluble salt in combination with wet 2,2-dithiobis(benzothiazole)
AssigneeThe Goodyear Tire & Rubber Company
InventorRichard Leshin
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Abstract
In a known process for preparing 2-(4-morpholinodithio)-benzothiazole using 2,2'-dithiobis(benzothiazole) along with morpholine, sulfur, an inert organic solvent such as isopropyl alcohol and an oxidizing agent, the improvement wherein a water soluble salt in combination with wet 2,2'-dithiobis(benzothiazole) is substituted for dry 2,2'-dithiobis(benzothiazole).
Claims10
A process of preparing 2-(4-morpholinodithio)-benzothiazole comprising combining a mixture of morpholine, sulfur, an inert organic solvent, a water soluble salt, and wet 2,2'-dithiobis(benzothiazole) with an aqueous solution of a water soluble oxidizing agent wherein the wet 2,2'-dithiobis (benzothiazole) contains 25 to 186 parts by weight of water per 100 parts by weight of 2,2'-dithiobis(benzothiazole), with the proviso that the maximum water level in the morpholine, sulfur, solvent 2,2'-dithiobis(benzothiazole) mixture, prior to combining the mixture with the oxidizing agent, is 186 parts by weight of water per 100 parts by weight of 2,2'-dithiobis (benzothiazole), and wherein the water soluble salt is present in an amount sufficient to constitute at least 50 percent of the amount of salt necessary to saturate the water content of the wet 2,2'-dithiobis(benzothiazole) at 25.degree. C., wherein the water soluble salt is soluble to the extent of at least 5 parts by weight per 100 parts by weight of water at 25.degree. C. wherein the water soluble salt is a compound other than the oxidizing agent and is incapable of adversely reacting with the oxidizing agent and the 2-(4-morpholinodithio)-benzothiazole.
Dependencies are inferred from the claim text.