As the industrial market shifts toward new waterborne polymer dispersions, there is an increasing need for biocides to protect the integrity of the finished products. When fouled, polymer dispersions may exhibit a number of undesirable side-effects such as viscosity reduction, separation, and production of gas or odor. The diversity and complexity of these new systems present a challenge to biocide selection. In industrial applications of waterbased polymer systems (e.g., paints and coatings, adhesives, and sealants), analytical testing of the system enables a formulator to maximize the efficacy of the biocide, and protect the integrity of the product. Proper analytical screening (including assay determination via high performance liquid chromatography, redox potential, pH measurement and general raw material compatibility testing) helps in the development of an effective microbial protection program to inhibit or control the growth of microorganisms that cause biodeterioration. This paper will address some key areas where analytical testing can provide critical information to ensure the optimal protection of polymer dispersions.
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