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AssigneeBASF Lacke + Farben, AG
InventorsYoshiaki Matsukura, Atsuhiro Sakai, Hitoshi Taniguchi, Yoshiaki Kawamura
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Provided are aqueous paints with which paint films which have excellent paint film properties such as water resistance and resistance to chemical attack, and excellent finished appearance are obtained, and which have excellent painting operability and storage stability. The invention further provides water dispersible acrylic based graft copolymers, aqueous paints incorporating same and a method to make such paints, wherein an unsaturated bond-containing acrylic based copolymer (a) obtained by reacting an acrylic based copolymer (a1) of acid value 35-120 mg.KOH/gram, hydroxy group value 50-150 mg.KOH/gram, glass transition temperature -20.degree.-+50.degree. C. and number average molecular weight 4500-9000 and an unsaturated monomer mixture (a2), which has functional groups which can react with hydroxy groups, in a mol ratio of a2/a1=0.4-1.5, and a monomer composition (b) compounded in such a way that the acid value is not more than 15 and the hydroxy group value is 50-150 are reacted in the proportions by weight of a/b=10/90-60/40 to produce the claimed water dispersible acrylic based graft copolymer.
A water dispersible acrylic based graft copolymer, comprising the reaction product of
A water dispersible acrylic based graft copolymer, comprising the reaction product of
A method for the manufacture of a water dispersible acrylic based graft copolymer, comprising reacting
Dependencies are inferred from the claim text.