Process for the preparation and use of latent reactive layers stable to storage or powder of the solid poliisocianatos of deactivated superficially and polìmeros dispersion with groups Fu.Ncionais

摘要

Invention patent: b "process for the preparation and use of latent reactive layers stable to storage or powder of the solid poliisocianatos of deactivated superficially and polu00ecmeros D.Ispersu00e3o with functional groups " d .The invention relates to processes for the preparation of latent reactive layers and powders.Stable storage of solid dispersions poliisocianatos deactivated superficially and the aqueous solutions of polymers are reactive to isocyanates.Which can be used as adhesives or coatings.These dispersions, suspensions or aqueous solutions can be applied onto a substrate in a suitable form, then water can be removed in a is below the temperatures of reaction of isocyanates.And this may be done above the softening temperature of the polymer.At room temperature are from layers of dry, essentially anhydrous.In temperature below reaction of poliisocianatos are stable to storage and remain capable of reaction.By the action of temperatures above the reaction temperature of the surface from poliisocianatos deactivated by reaction with the functional groups of the polymer layers are cross-linked with ALTThe heat stability and high chemical resistance. The products are latent in the form of layer or powder are used for the production of compounds, adhesives and coatings.