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| - Typical water-soluble thickening agents include, but are not limited to, water-soluble polymers such as polyacrylamide, partially hydrolyzed polyacrylamide, polyacrylic acid, polyvinyl alcohol, polyvinyl pyrrolidone, polystyrene sulfonate, polyethylene oxide, and a heteropolysaccharide produced by bacteria of the genus Xanthomonas; cellulose derivatives such as methylcellulose, ethylcellulose, car
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