| 摘要 |
To obtain paint films with outstanding paint film performance traits such as water resistance and chemical resistance, etc., and outstanding finished appearance, and to obtain water-based paints which are easy to apply and have outstanding storage stability. An acrylic copolymer of acid number 35-120 mg KOH/g, hydroxyl group number 50-150 mg KOH/g, glass transition temperature -20 to +50 DEG C and number average molecular mass 4500-9000, comprising a copolymer of alpha , beta -ethylenic unsaturated monomers (a), and a monomer combination including an alpha , beta -ethylenic unsaturated monomer containing a glycidal group and an alpha , beta -etylenic unsaturated monomer containing a hydroxyl group to give an acid number of </=15 mg KOH/g and a hydroxyl group number of 50-150 mg KOH/g (b), are reacted in specified proportions in a single stage to make a water-dispersible acrylic graft copolymer which has an acid number of 10-30 mg KOH/g, a hydroxyl group number of 50-150 mg KOH/g, a glass transition temperature of -20 to +50 DEG C and a number-average molecular mass of 10,000-100,000 by grafting side chains formed from the aforementioned (b) to a main chain from the aforementioned (a), and this graft copolymer is dispersed in an aqueous medium to obtain a water-based paint.
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| 申请人 |
BASF LACKE + FARBEN AG;NOF CORPORATION;MATSUKURA, YOSHIAKI;TANIGUCHI, HITOSHI;SAKAI, ATSUHIRO;KAWAMURA, YOSHIAKI |
发明人 |
MATSUKURA, YOSHIAKI;TANIGUCHI, HITOSHI;SAKAI, ATSUHIRO;KAWAMURA, YOSHIAKI |
