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| How can solid sulfonated polyester (pellets) be dispersed? |
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Polyester that is highly sulfonated is water-dispersible. These products are sold under the name, Eastman AQ polymers. A dispersion is prepared by mixing the solid material (pellets) in hot water at 71°C (160°F) or higher with agitation for about 30 minutes for most Eastman AQ products. After cooling, the dispersion will remain stable as long as the concentration does not go above 30% weight for most Eastman AQ water-dispersible polyesters.
An exception to this is Eastman AQ 48 polymer which should be dispersed at a maximum temperature of 50°C. When using Eastman AQ 48 polymer in formulations that are intended to remain clear, the Eastman AQ 48 polymer dispersion should be used as soon as possible to make the final formulation. |
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