| 摘要 |
Disclosed is a hydrophilic hydrolysis-stable carboxyl-modified synthetic resin obtainable by reacting (a) at least one resin selected from the group consisting of a hydroxy-functional ketone resin, a hydroxy-functional ketone/aldehyde resin, a hydroxy-functional urea/aldehyde resin and hydrogenated follow-on products thereof with (b) a compound selected from a polycarboxylic acid and an anhydride, ester or halide thereof, wherein 70 to 100% of the reacted compound (b) is linked chemically via an ester linkage to the resin (a) by way of a single linkage and 30 to 0% of the reacted compound (b) is so linked by way of more than one linkage. The resin is useful as an additive in aqueous coating systems.
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