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. 09, 1999
Filed:
Dec. 31, 1997
Applicant:
Inventors:
Allen R Syrinek, Richmond, TX (US);
Hester A Clever, Richmond, TX (US);
Assignee:
Nalco/Exxon Energy Chemicals, L.P., Sugar Land, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526 83 ; 526 82 ; 526 84 ; 526 85 ; 526335 ; 526340 ; 546242 ;
Abstract
The present invention relates to a method of terminating a free-radical initiated emulsion polymerization by utilizing a shortstopping agent that contains a stable nitroxyl free-radical or is capable of forming a stable nitroxyl free radical in situ. Besides more effective stopping of polymerization, the present invention does not contain nitrosamine precursors nor is the shortstop agent easily removed during latex and polymer processing.