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:
Mar. 07, 1995
Filed:
Apr. 25, 1994
Applicant:
Inventors:
John R Hurlock, Hickory Hills, IL (US);
Martha R Finck, St. Jerome, FR;
Assignee:
Nalco Chemical Company, Naperville, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525344 ; 5253294 ; 5253299 ; 525379 ; 525380 ;
Abstract
The invention comprises a process for synthesizing a high molecular weight hydroxamic acid polymer and other substituted amides onto a polyacrylic acid or a polymethacrylic acid latex backbone by reacting a stable, inverse polyacrylic acid or polymethacrylic acid latex with hydroxylamine sulfate, in the case of hydroxamic acid, or other primary amines, to produce the high molecular weight substituted amides. The invention further comprises a method of clarifying Bayer process liquors using the substituted amides produced by the process.