| 摘要 |
The invention relates to a polyester AB comprising moieties derived from di- or polyfunctional organic acid compounds A and moieties derived from di- or polyfunctional organic hydroxy compounds B, wherein the compounds A comprise hard acid compounds A1 having two or more acid groups per molecule, and soft acid compounds A2, and the compounds B comprise hard hydroxyfunctional compounds B1 having two or more hydroxyl groups per molecule, and soft hydroxyfunctional compounds B2, and coating compositions prepared from these with crosslinkers selected from the group consisting of isocyanates, capped isocyanates, aminoplast crosslinkers, and phenoplast crosslinkers, as well as their application in coating of metal substrates.
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