| 摘要 |
Air-drying lacquer binders comprising copolymers of copolymerised units of 20 TO 55% BY WEIGHT OF STYRENE, 5 TO 30% BY WEIGHT OF GLYCIDYL (METH)ACRYLATE, AND 0 TO 50% BY WEIGHT OF AT LEAST ONE (METH)ACRYLIC ACID ESTER HAVING FROM 1 TO 10 C-atoms in the alcohol component, WHICH COPOLYMERS HAVE BEEN ESTERIFIED TO ACID NUMBERS OF FROM 0 TO 10 WITH FROM 22 TO 50% BY WEIGHT OF AIR-DRYING FATTY ACIDS, BASED ON THE QUANTITY OF COPOLYMER AND DRYING FATTY ACIDS AND DICARBOXYLIC ACID ANHYDRIDE, AND THE HYDROXYL GROUPS THEREBY FORMED HAVE SUBSEQUENTLY BEEN REACTED WITH FROM 0.5 TO 3% BY WEIGHT OF DICARBOXYLIC ACID ANHYDRIDE, BASED ON THE QUANTITY OF COPOLYMER AND DRYING FATTY ACIDS AND DICARBOXYLIC ACID ANHYDRIDE, CHARACTERIZED IN THAT THE BINDERS HAVE ACID NUMBERS OF FROM 5 TO 15, THESE FINAL ACID NUMBERS BEING MADE UP OF THE ACID NUMBERS OF FROM 0 TO 10 OBTAINED BY THE ESTERIFICATION WITH DRYING FATTY ACIDS AND THE ACID NUMBERS OF FROM 1 TO 15 OBTAINED FROM THE REACTION WITH THE DICARBOXYLIC ACID ANHYDRIDE. |
