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:
Oct. 17, 1989
Filed:
Aug. 24, 1988
Applicant:
Inventors:
Ratana Kanluen, Guelph, CA;
Brigitte H Licht, Burlington, CA;
Assignee:
Hart Chemical Limited, Guelph, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526214 ; 522 84 ; 522-3 ; 522 13 ;
Abstract
The water dispersibility of water-soluble vinyl polymers, for example, polyacrylamides, is improved by incorporating a suitable surfactant in the monomer mixture from which the polymer is formed. The polymerization is effected by an initial phase of ultraviolet radiation-induced free radical polymerization until the monomer mix achieves the temperature at which chemically-induced free radical polymerization commences and then a terminal phase of chemically-induced free radical polymerization.