| 摘要 |
An aqueous preparation of polyurethanes comprises 2-20 wt.% in relation to solids of lateral or terminal groups containing alkyl or cycloalkyl. The aqueous preparation of polyurethanes comprises 2-20 wt.% in relation to solids of lateral or terminal groups of formula -N(H)-C(=O)-O-B-C(=O)-O-R. B : benzene;and R : alkyl or cycloalkyl. Independent claims are also included for: (1) a process for production of the inventive preparations comprising reacting in a first stage, the synthesis components i) organic compounds comprising >=2 free hydroxyl groups, capable of reacting with isocyanate groups, ii) diols and polyols having molecular weight of 62-299, iii) synthesis components for the incorporation of terminal and/or lateral ethylene oxide units of formula H-Y'-X-Y-R, iv) organic compounds having >=2 free isocyanate groups per molecule, and optionally v) synthesis components that are monofunctional according to the isocyanate polyaddition reaction and additionally contain anionic or potentially anionic group consisting of vA) mono and dihydroxy-carboxylic acids or their salts and vC) sulfonate group-containing aliphatic diols, and vii) p-hydroxybenzoic acid esters of formula H-O-B-C=(O)-O-R to form a prepolymer, the required quantities of the individual synthesis components being measured in such as way as to result in an isocyanate index of 1.05 to 4.5, then in a second stage, dissolving the prepolymer in an organic solvent and optionally in a third stage reacting the isocyanate-containing prepolymer solution with vB) mono- and/or diamino carboxylic acids or their salts and/or mono- and/or diamino sulfonic acids or their salts, and/or vi) aliphatic and/or alicyclic primary and/or secondary polyamines optionally neutralizing potentially anionic components before or after the third stage and either the components vA) or vC) being used in the first stage and/or component vB) being used in the third stage, precipitating the dispersion in a fourth stage by the addition of water and removing the organic solvent in a final stage; (2) a method of coating or producing substrates comprising applying the inventive preparations to surface of substrates; and (3) polymers coated with the inventive preparations. R : 1-12C monovalent hydrocarbon; X : polyalkylene oxide chain with 5-90 ethylene oxide units and optionally propylene oxide, butylene oxide, or styrene oxide units; Y, Y' : O or -NR'-;and R' : H or 1-18C alkyl or cylcoalkyl. |
