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:
Sep. 17, 1985
Filed:
Aug. 22, 1984
Applicant:
Inventors:
Timothy Thomson, Baton Rouge, LA (US);
Ronald L Glomski, Baton Rouge, LA (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605 / ; 1063 / ; 2605 / ;
Abstract
The present invention provides a water-soluble dispersant for aqueous slurries of coal, lignite, cement, gypsum, and fillers. The dispersant comprises a sulfonated mixture of polynuclear fused-ring aromatic hydrocarbon compounds. The mixture, prior to sulfonation, (a) is liquid at a temperature of 100.degree. Centigrade, (b) has an aromatic content of more than about sixty percent, (c) a molecular weight distribution of from about 150 to about 10,000, and (d) a weight average molecular weight of less than about five hundred.