Mitsui Chemicals, Inc.

Hiroyuki Sakayama

Tsuyoshi Matsumoto

Mitsuyuki Mizoguchi

Takahisa Miyawaki

Yoshio Kikuta

Shinji Kiyono

Tadahito Nobori

Isao Hara

Kazumi Mizutani

Atsushi Shibahara

Katsuhiko Funaki

Takaomi Hayashi

Setsuko Fujiyoshi

Yoshiharu Hirose

Hiromi Jouyama

The purpose of the present invention is to provide polymerization catalyst which can produce quite efficiently (co)polymer having number average molecular weight and number of molecules which are accurately controlled in producing method of (co)polymer by the polymerization of polar unsaturated compound, and provide living polymerized (co)polymer obtained according to the producing method. For the purpose, polymerization catalyst composition which comprises the composition comprising organic oxysalt compound and hydroxycarbonyl compound having at least both an alcoholic hydroxyl group and a carbonyl group in the same molecule is provided and the polar unsaturated compound is polymerized by using the polymerization catalyst composition. The composition containing the obtained (co)polymer were able to provide thermosetting powder coating composition having particularly excellent characteristics.

Process for the production of living (co)polymers and use of the (co)polymers

Thermosetting powder resin composition

A thermosetting powder coating composition which comprises a resin composition (A) having a sea-island type microphase separation structure constituted of a continuous phase (a sea phase) comprising an acrylic copolymer and a dispersion phase (an island phase) comprising a thermoplastic elastomer and a curing agent (B) and in which the total amount of a thermosetting elastomer (a-2) constituting the dispersion phase is in the range of 0.5 to 20 parts by weight with respect to 100 parts by weight of the resin composition (A). This powder coating composition is excellent in chipping resistance, impact resistance, weathering resistance and appearance properties, and it is particularly suitable for the coating of vehicles.

Thermosetting powder coating composition

Thermosetting resin composition for powder paint and thermosetting powder paint composition using the same

A thermosetting powder paint composition for top coating excellent in weather resistance and storage stability, which comprising 100 parts by weight of an acrylic copolymer (A) having an epoxy group, and 0.01 to 2.0 parts by weight of an organic modified polysiloxane (B) containing at least one functional group, at least two silicon atoms and no radical-polymerizable unsaturated bond wherein the component (B) is contained in the condition that a part or all thereof has reacted and bonded with the component (A) or the component (C), or all thereof has not reacted with them.

Thermosetting powder paint composition

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Kanagawa, Japan

Hiroyuki Sakayama