Nippon Carbide Kogyo Kabushiki Kaisha

Yoshihiro Maeyama

Masami Uemae

Shinobu Nakagawa

Hiroshi Serizawa

Takeshi Komatsu

Akira Kume

Takashi Yamakoshi

A waterborne coating composition comprising fine polymer particles dispersed in an aqueous medium and an inorganic filler, wherein the fine polymer particles comprise (A) 50 to 90% by weight of synthetic rubber polymer particles containing 50 to 90% by weight of a repeating unit derived from a conjugated diolefin monomer and having a glass transition temperature of &#x2212;20&#xb0; C. or lower and (B) 10 to 50% by weight of acrylic polymer particles containing 50% by weight or more of a repeating unit derived from an acrylic ester and/or a methacrylic ester and having a glass transition temperature of 0&#xb0; C. or lower.

Waterborne anti-chipping coating composition for automobiles

This invention discloses an aqueous resin dispersion excellent in adhesion to a base material and stability, and capable of forming a coat which exhibits excellent vibration-damping properties over a wide temperature range, and moreover, is flexible and excellent in resistance to chipping and low temperature resistance to impact, and it is an aqueous resin dispersion comprising polymer fine particles dispersed in an aqueous medium, and contains, as the polymer fine particles, composite fine particles (A) comprising a core part and a shell part having specific glass transition temperatures (Tg), respectively, specific composite fine particles (B) wherein the Tg of its core part is different from that of the composite fine particles (A), and/or polymer fine particles (C) having a specific Tg.

Aqueous resin dispersion

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.

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Sano, Japan

Yoshihiro Maeyama