| 摘要 |
The invention relates to water-borne coating binders ABC comprising a mixture of a curing agent C and a reaction product AB made by at least partial esterification of a hydroxyl group-containing polyester A and an acid groups-containing polyurethane B, characterised in that each of A and B comprise not more than 20% of the amount of substance of their educts A1, A2, B1, and B2, of molecules comprising aromatic structures, to a method of their preparation, and a method of use thereof to formulate primer-surfacer coating compositions. |
