Christopher G Howland

US Patent:

55978584, Jan 28, 1997

Filed:

Mar 22, 1995

Appl. No.:

8/408764

Inventors:

Manian Ramesh - Lisle IL
Jeffrey R. Cramm - Winfield IL
Darrell L. Werges - Naperville IL
Christopher P. Howland - Aurora IL

Assignee:

Nalco Chemical Company - Naperville IL

International Classification:

C08L 1302

US Classification:

524458

Abstract:

An improved process for the preparing a dispersions of water soluble cationic polymers in an aqueous salt solution is disclosed. The improvement comprises using as a polymeric dispersion stabilizer a water soluble hydrophobically associating copolymer of diallyldimethylammonium chloride and a monomer selected from the group consisting of: ##STR1## and alkyl esters of acrylic acid, where R. sub. 1 is either hydrogen or CH. sub. 3 ; R. sub. 2 and R. sub. 3 are each an alkyl group having 1 to 3 carbon atoms; A. sub. 1 is either an oxygen atom or NH; B. sub. 1 is either an alkylene group having 2 to 4 carbon atoms or a hydroxypropylene group, Q is benzyl, or C. sub. 6 -C. sub. 20 alkyl, and X. sub. 1. sup. - is an anionic counterion.