ADHESIVE MATERIALS
European Patent Office Patent
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Abstract
The present invention relates to an aqueous dispersion containing at least one partially crystalline polyurethane-polyurea polymer and at least one surface-deactivated polyisocyanate, preferably at least one surface-deactivated solid polyisocyanate, the melting point of the partially crystalline polyurethane-polyurea polymer being at least 55° C., a process for preparing the aqueous dispersion, the use the aqueous dispersion for the production of coated substrates or for the production of adhesive films, flat or three-dimensional substrates coated with the aqueous dispersion, a substrate coated with at least one partially crystalline polyurethane-polyurea polymer and at least one surface-deactivated polyisocyanate, preferably at least one surface-deactivated solid polyisocyanate, wherein the melting temperature of the partially crystalline polyurethane-polyurea polymer is at least 55°C, an adhesive film comprising at least one partially crystalline polyurethane-polyurea polymer and at least one surface-deactivated polyisocyanate, preferably at least one surface-deactivated solid polyisocyanate, characterized in that the melting temperature of the partially crystalline polyurethane-polyurea polymer is at least 55°C , and a dried adhesive film obtained from such an aqueous dispersion.
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