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AssigneesKansai Paint Co., Ltd., Toyo Seikan Kaisha, Ltd.
InventorsYusuke Obu, Kashiko Kawai, Tomohiro Miyai, Shunya Nangou, Takahiro Hidaka, Hideki Masuda
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To provide a coating composition for undercoating which, in forming a gas-barrier layer having a crosslinked structure between a polycarboxylic acid type polymer and polyvalent metal ions by the heating at a low temperature for a short period of time, permits polyvalent metal ions to be easily and quickly fed into the polycarboxylic acid type polymer and, besides, into the whole gas-barrier layer. A coating composition containing, as chief components, a nonaqueous polyester polyol, an isocyanate compound, and an alkaline compound of a polyvalent metal that serves as an ion source for forming the crosslinked structure, wherein the nonaqueous polyester polyol contains a nonaqueous polyester polyol which contains a metal element in the resin skeleton thereof as an essential component, and the alkaline compound of the polyvalent metal has an average primary particle size in a range of 0.005 to 0.5 μm.
A coating composition for undercoating applied as an undercoating onto the surface of a plastic base material for forming a gas-barrier layer that has a crosslinked structure of a polycarboxylic acid type polymer and polyvalent metal ions, said coating composition containing, as chief components, a nonaqueous polyester polyol, an isocyanate compound having at least two isocyanate groups in a molecule thereof, and an alkaline compound of a polyvalent metal that serves as an ion source for forming said crosslinked structure, wherein:
Dependencies are inferred from the claim text.