Hydrophilic, saponification-stable esterified synthetic resins, particularly suitable for aqueous systems

摘要

Hydrophilic synthetic resins which are stable against saponification are prepared by reacting the following two components : (A) ketone, ketone/aldehyde or urea/aldehyde resins containing hydroxyl functional groups and/or their hydrogenated derivatives ; and (B) polycarboxylic acids or their anhydride, ester and/or halide derivatives, of which 70-100 % can form a ester bond with (A) via only one functional group and 0-30 % can form a chemical bond with (A) via more than one functional group. Also claimed are (i) aqueous systems containing these resins, (ii) the preparation of these resins by reacting (A) and (B) in the solution or melt phase in a molar ratio of 1:0.3-3 (0.5-1.8), (iii) the preparation of these resins by reacting (A) and (B) in the solution or melt phase in a molar ratio of 1:0.3-3 (0.5-1.8) so that 80-100 % of (B) is bonded to (A) via only one functional group and 0-20 % of (B) is bonded via two or more functional groups, and (iv) a method for the preparation of aqueous systems containing these resins, by mixing the neutralised resin melt or solution with water.