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:
Jun. 29, 1976
Filed:
Sep. 09, 1974
Walter W Hellmuth, Beacon, NY (US);
Harry Chafetz, Poughkeepsie, NY (US);
William P Cullen, Fishkill, NY (US);
Texaco Inc., New York, NY (US);
Abstract
In the method of preparing sulfurized, alkoxylated, inorganic phosphorus acid free, steam hydrolyzed polyalkene-P.sub.2 S.sub.5 reaction product useful as a detergent-dispersant in lubricating oil compositions of improved antioxidant and odor properties comprising contacting polyalkene and P.sub.2 S.sub.5 in the presence of a catalytic amount of sulfur to form the polyalkene-P.sub.2 S.sub.5 reaction product, contacting the resultant polyalkene-P.sub.2 S.sub.5 reaction product with steam to form an inorganic phosphorus acid containing hydrolyzed polyalkene-P.sub.2 S.sub.5 reaction product, removing inorganic phosphorus acid from the hydrolyzed polyalkene-P.sub.2 S.sub.5 reaction product, contacting the inorganic acid free, hydrolyzed polyalkene-P.sub.2 S.sub.5 reaction product with alkylene oxide, the improvement which comprises the step selected from the group consisting of 1). contacting said inorganic acid free, steam hydrolyzed polyalkene-P.sub.2 S.sub.5 intermediate product with added sulfur, and 2). contacting the alkoxylated, inorganic phosphorus acid free, steam hydrolyzed polyalkene-P.sub.2 S.sub.5 reaction product with added sulfur. The invention is also directed to the resultant sulfurized alkoxylated product and lubricant compositions thereof.