Dispercoll® U 56

Dispercoll^® U 56 has outstanding bonding properties on most synthetic and natural materials. The thermal stability and resistance to plasticisers, grease and oil can be increased by the addition of 2 – 5 % by weight of a water-emulsifiable polyisocyanate from the Desmodur® range. The crosslinker is added just before application of the adhesive and mixed thoroughly. Attention should be paid to the pot life of the formulation. In order to customise other application-specific and technical properties, resin dispersions, emulsifiers and thickeners may also be added. Before application, especially by spraying, the product should be filtered to remove any polymer particles which may have formed by initial drying.

For heat activation bonding applications with Dispercoll^® U 56, a bond line temperature in the range of approx. 55 – 65 °C or even higher is recommended to allow the dried adhesive layer to be fully activated for bonding. The actual temperature needed for a specific application will depend on the time in the press, the pressure applied and the substrates being bonded.

Dispersion in water with a non-volatile content of approx. 50 %.