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    • 8. 发明专利
    • AT476474T
    • 2010-08-15
    • AT06003664
    • 2006-02-23
    • BAYER MATERIALSCIENCE AG
    • HOFACKER STEFFENMECHTEL MARKUSMUENZMAY THOMASYUVA NUSRETGERTZMANN ROLF
    • C08L33/00C08F283/00C09D151/00
    • An aqueous copolymer dispersion comprises hydroxy-functional copolymer(s) prepared from (a) hydroxy-free (meth)acrylic ester(s) and/or vinylaromatics, (b) hydroxy-functional (meth)acrylic ester(s), (c) ionic and/or potential ionic monomer(s) capable of free-radical copolymerization, and (d) optionally monomer(s) other than components (a)-(c) and capable of free-radical copolymerization; and hydroxy-functional polycarbonate polyol(s) as reactive diluent. Independent claims are included for: (1) preparation of aqueous copolymer dispersion by free-radically polymerizing monomer mixture(s) containing components (a)-(d) in the presence of hydroxy (OH)-functional polycarbonate polyols as reactive diluent, and subsequently dispersing the resulting copolymers in water before or after the addition of a neutralizing agent; (2) an aqueous coating composition comprising the above aqueous copolymer dispersion(s) and OH-reactive crosslinker(s); (3) formation of coatings by applying a coating composition to a substrate and subsequently curing the coating composition; and (4) a substrate coated with the coating composition.