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:
Jan. 12, 1982
Filed:
Nov. 18, 1980
Henry S Makowski, deceased, late of Scotch Plains, NJ (US);
Exxon Research & Engineering Co., Florham Park, NJ (US);
Abstract
This invention relates to a process for the formation of a neutralized sulfonated polymer having about 10 to about 60 meq. sulfonate groups, wherein the sulfonate groups are neutralized with a barium counterion. A cement of a polymer having olefinic functional groups and a non-reactive solvent is contacted with a sulfonating agent such as an acyl sulfate. After terminating the sulfonation reaction by quenching with methanol, the sulfonated polymer is then neutralized with a solution of barium hydroxide, barium acetate or barium carboxylate dissolved in a carboxylic acid having about 1 to about 4 carbon atoms or a combination solvent of methanol and a carboxylic acid. A carboxylic acid having at least about 10 carbon atoms can be then added to the cement of the neutralized sulfonated polymer thereby forming a barium salt of the carboxylic acid having at least about 10 carbon atoms in situ, wherein the barium salt of the carboxylic acid having at least about 10 carbon atoms is a preferential plasticizer for the zinc sulfonate groups. The Brookfield viscosity at 3.0 rpm at room temperature of the cement of the barium neutralized sulfonated polymer is less than about 50,000 cps.