Process for the preparation of aqueous dispersions or solutions of polyurethane polyureas containing heat activated cross-linking agents, the dispersions or solutions obtainable by this process, and their use for the production of coatings

摘要: This invention relates to a new process for the preparation of storage stable aqueous dispersions or solutions cross-linkable polyurethane polyureas containing heat activated cross-linking agents, in which mixtures hydrophilically modified prepolymers isocyanate groups, hydrophobic polyisocyanates contain blocked groups and are neither soluble nor dispersible water, compounds at most one free aminic hydrazinic primary secondary amino group least under influence water forms total two such prepared absence then mixed with it also obtained by this their use production coatings on heat-resistant substrates.