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:
Aug. 22, 1989
Filed:
Sep. 11, 1987
Thomas P Bosanec, Racine, WI (US);
Kenneth R Lukow, Racine, WI (US);
Calvin J Verbrugge, Racine, WI (US);
S. C. Johnson & Son, Inc., Racine, WI (US);
Abstract
Disclosed is a method of making a polymer containing more than 50 to about 95 mole percent, preferably 65 to 80 mole percent, of units derived from maleic anhydride and the balance units derived from at least one 1-alkene. The method comprises mixing the maleic anhydride and 1-alkenes selected in the presence of a thermally decomposable initiator and, optionally, in the presence of a solvent at a temperature ranging between 145.degree. C. to 200.degree. C., in such a manner that throughout the process, the ratio of maleic anhydride to 1-alkenes is more than 50:50 to about 95:5, most preferably between 65:35 to 80:20, to form a reaction mixture and thereafter maintaining the reaction mixture at from 145.degree. C. to 200.degree. C. until a polymer containing more than 50 mole percent of maleic anhydride is obtained. In an alternative embodiment, the method further comprises preparing a precharge of maleic anhydride and the 1-alkenes selected in more than a 50:50 to about 95:5 molar ratio, heating the precharge to 145.degree. C. to 200.degree. C. and thereafter mixing the remaining reactants into the precharge.