Water-based adhesives based on natural polymers

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Adhesives based on natural polymers are derived from either animal or plant materials.In the case of animal sources, the polymeric substances are typically proteins, such as casein. In the case of plant sources, they are generally carbohydrates, such as starch. Adhesives can also contain mixtures of animal- and plant-based polymers, combined with synthetic polymers as well. As natural polymers are typically hydrophilic, they are generally dissolved in water in the form of so-called colloidal solutions2. A special case is natural rubber latex, which is not hydrophilic and forms a dispersion in water. The setting of the adhesive occurs, in either case, by evaporation of water.

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