| 摘要 |
PURPOSE:To obtain a resin compsn. for paints having excellent dryability and stain resistance, by graft copolymerizing an alpha,beta-ethylenically unsatd. acid glycidyl ester modified with an aliphatic acid with a copolymerizable monomer in the presence of an oxidative polymerization alkyd resin. CONSTITUTION:A (semi)drying oil fatty acid (e.g.: linseed oil fatty acid) is reacted with an alpha,beta-ethylenically unsatd. acid glycidyl ester (e.g.: glycidyl acrylate) to produce a fatty acid-modified monomer. The fatty acid-modified monomer is graft-copolymerized with other copolymerizable monomer (e.g.: acrylic acid) in the presence of an oxidative polymerization alkyd resin to obtain an intended resin compsn. for paints. The oxidative polymerization alkyd resin can be obtained, e.g., by reacting a (semi)drying oil with a polyhydric alcohol (e.g.: glycerin), forming a monoester by means of an ester exchange reaction and reacting the monoester with a polybasic acid( e.g.: phthalic anhydride).
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