| 摘要 |
An air-drying lacquer binder comprising a copolymer of copolymerized 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 WITH 1 TO 10 CARBON ATOMS IN THE ALCOHOL COMPONENT, WHICH HAS BEEN ESTERIFIED WITH 0 TO 15% BY WEIGHT OF AT LEAST ONE NATURAL, DRYING FATTY ACID, AND 10 TO 50% BY WEIGHT OF ISOMERIZED DRYING FATTY ACIDS (THE SUM OF THE PERCENTAGE CONTENTS AMOUNTING TO 22 - 50 PERCENT BY WEIGHT) BASED ON THE COPOLYMER AND DRYING FATTY ACIDS AND DICARBOXYLIC ACID ANHYDRIDE SUBSEQUENTLY USED, UP TO AN ACID NUMBER OF <10, FROM 30 TO 75% BY WT. OF THE ISOMERISED DRYING FATTY ACIDS CONTAINING CONJUGATED DOUBLE BONDS, AND WHEREIN THE HYDROXYL GROUPS FORMED HAVE, SUBSEQUENTLY, BEEN REACTED WITH FROM 0.5 TO 3% BY WEIGHT, BASED ON THE TOTAL COMPONENTS OF THE BINDER, OF TETRAHYDROPHTHALIC ACID ANHYDRIDE AND/OR AT LEAST ONE ISOMER THEREOF. The lacquer binders possess very good pigment absorbing and wetting properties, very good lacquer-grade processibility and even after the addition of an anti-skinning agent constant drying times under constant drying conditions. |
