Patent ID: 7022761
Filing Date: 2006-04-04
Classification: D06P,Y10T

Abstract:
1. A printing paste containing: a) 5 to 30% by weight of a polyurethane, b) 1 to 20% by weight of an organic fixing agent which is a fatty acid ester, a low molecular weight polyester or a compound obtained by the following process steps: A) reacting a diisocyanate or a mixture of diisocyanates (component I) with one or more alcohols having from 2 to 8 carbon atoms and/or with one or more mono- and/or diethers of such alcohols (component II), these alcohols or ethers thereof having at least two alcoholic hydroxyl groups and no more than two C—O—C bonds, and the reaction being carried out such that the product formed still has free isocyanate groups, B) reacting the product obtained in step A) with an organic amine containing two or more alcoholic hydroxyl groups, or a mixture of such amines, the reaction being carried out such that the product formed still has free isocyanate groups, with the proviso that at least one alcohol, one ether or one amine from amongst the alcohols, ethers and amines used in step A) and/or B) contains three or more alcoholic hydroxyl groups, C) blocking the free isocyanate groups of the product obtained in step B) by reaction with a blocking agent, D) dispersing the product obtained after step C) in water using one or more dispersants and adjusting the pH, c) 0 to 50% by weight of one or more further ingredient(s) and d) water as the remainder, the sum of the amounts of components (a)+(b)+(c)+(d) being 100%.