Actual trends in launching new formulates based on vinylacetate dispersionsusable for water-resistant adhesives for wood and wood-based products concern glues with zero formaldehyde.
Moreover, another peculiar behaviour of this class of adhesives is the chromatic alteration of the bondline during time, which could represent an aesthetic defect for some specific products (panels, furniture etc.). This paper demonstrates that it is possible to satisfy market needs by a new approach in formulating products with excellent performances,low formaldehyde emission and no coloration of the glueline, mainly if compared with traditional PVAc dispersions used for the same applications.

Controlled delaminating materials, CDM, introduce new exciting solutions in the packaging
industry. The technology has the potential to save cost in distribution through significantly shorter handling time when transferring products from distribution packaging to store shelves. It also gives the possibility for new consumer packaging with easy opening, product presentation, theft prevention, authenticity etc. The presently available CDM applications are based on electrically debondable adhesives. In this talk the development of electrically debondable adhesive is presented.

Markets for waterborne adhesive dispersions are continuously growing for many years, mainly driven by innovation in raw materials, formulation and application know-how as well as the need for eco-friendly solutions.
Latest developments in waterborne adhesive raw materials by Bayer MaterialScience AG such as the new 1-component latent reactive Polyurethane dispersions offer advanced performance combined with simplified bonding processes, e.g. via pre-coated, substrates which can be activated upon heating. Our new improved Polychloroprene dispersions with very low VOC levels for direct use in efficient foam bonding processes are latest examples to set trends in environmentally friendly adhesive technologies.

There is a clear trend in the end markets towards sustainable chemical products that minimize the use of petrochemical resources without limiting functionalities, quality and economics of currently used products and, if possible, adding new functionalities to them.
A polyurethane-based polymer is the result of the chemical reaction of one or several polyols, and one or several isocyanates. Polyols derived from vegetal sources are well known in the polyurethane technology. Nevertheless, the use of such polyols has been limited to foam or coating applications due to their inherent and difficult to control polyfunctionality. Because high-performance polyurethane adhesives show excellent mechanical and elastomeric properties, the first target of our research was to obtain strictly bifunctional polyols derived from renewable vegetal sources.
A new family of TPU for adhesives are presented. This new TPU series has application for polyurethane solvent and water based adhesives, polyurethane for thermobonding and shoe stiffeners, and polyurethane reactive hot-melt adhesives. A full range of vegetal source derived bifunctional polyols has been developed. The reaction of these polyols in the TPU formulation allows new TPUs with a renewable content ranging from 30% to 90% by weight. Compared to the standard petrochemical based grades, the new ‘green-TPUs’ show better hydrolytic resistance and green strength, allow higher productivity, and maintain equivalent mechanical properties. For instance, the retention of mechanical properties after a tropical test at 80ºC for one month increases from 25% to 75%. A very important improvement in crystallization properties is also observed, with crystallization speed increase of 50% and crystallization enthalpy increase of 30%.