Aqueous PU dispersions are reported to have been available to the adhesive industry for some time. They find use in a variety of applications that require high performance, the bonding of difficult substrates or the replacement of solvent-based systems. Polyurethane dispersions are also an increasingly important and versatile group of waterborne binders for inks, adhesives and various coatings. By altering the type and proportions of monomers used, it is possible to achieve endless variation in properties. PU coatings can be used for such divergent applications as automotive applications, optical fibres and golf balls. According to a market study by Frost & Sullivan polyurethanes are forecast to become one of the polymers spearheading growth in the market for structural adhesives, as they replace traditional fastening methods in a number of end-use markets.
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