Patent ID: 6251680
Filing Date: 2001-06-26
Classification: C02F,C08F,C11D,Y10T

Abstract:
Method for detecting a polymer in an aqueous system, comprisingi) prior to addition to the aqueous system, reacting the polymer so that it comprises a terminal moiety containing a pendant amine group; wherein the molar ratio of moiety containing the pendant amine group to other monomer in the polymer, prior to attachment of a detectable label, is from 1:3 to 1:300; and wherein the polymer comprises, as polymerized units, monoethylenically unsaturated acids selected from one or more of acrylic acid, methacrylic acid, crotonic acid, vinylacetic acid, maleic acid, maleic anhydride, 1,2,3,6-tetrahydrophthalic anhydride, 3,6-epoxy-1,2,3,6-tetrahydrophthalic anhydride, 5-norbornene-2,3-dicarboxylic anhydride, bicyclo[2.2.2]-5-octene-2,3-di-carboxylic anhydride, 3-methyl-1,2,6-tetrahydrophthalic anhydride, 2-methyl-1,3,6-tetrahydrophthalic anhydride, itaconic acid, mesaconic acid, fumaric acid, citraconic acid, 2-acrylamido-2-methylpronanesulfonic acid, allylsulfonic acid, allylphosphonic acid, allyloxybenzenesulfonic acid, 2-hydroxy-3-(2-propenyloxy)-propanesulfonic acid, isopropenylsulfonic acid, isopropenylphosphonic acid, vinylphosphonic acid, styrenesulfonic acid, vinylsulfonic acid and the alkali metal or ammonium salts thereof;ii) removing a sample of the aqueous system containing the polymer and adding a detectable label reactive with amines;iii) maintaining the sample under such conditions that the detectable label reacts with the pendant amine group to become attached to the polymer; andiv) detecting the label.