Nippon Carbide Kogyo Kabushiki Kaisha

Takeshi Komatsu

Masami Uemae

Yoshihiro Maeyama

Akira Kume

Takashi Yamakoshi

An aqueous coating composition comprising fine polymer particles dispersed in an aqueous medium and an inorganic filler, wherein said fine polymer particles comprise synthetic rubber emulsion polymer particles having a glass transition temperature of 0.degree. C. or less and emulsion polymer particles having a glass transition temperature of 20.degree. C. or more, and further, according to circumstances, urethane emulsion polymer particles. This composition has various properties as a chipping-resistant coating agent in good balance and is particularly useful for coating of the outdoor sheet metal working members of wheeled vehicles.

Aqueous coating composition

An aqueous dispersion of an acrylic polymer comprising acrylic polymer particles dispersed in an aqueous medium in which aqueous dispersion the acrylic polymer particles are composite particles composed of the core part and skin layer part of acrylic polymers having mutually different glass transition temperatures. The aqueous dispersion is useful for preparation of an aqueous coating composition excellent in normal-temperature and low-temperature resistance to chipping.

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Ninomiya, Japan

Takeshi Komatsu