Nippon Paint Compnay, Ltd.

Makoto Ando

Mitsuo Yamada

Shinsuke Shirakawa

Masahiro Takegawa

Satoshi Urano

Ryoichi Murakami

Yoshio Kojima

Hirotaka Kanato

Keisuke Tsutsui

Method for producing pigment dispersing resin for cationic electrodeposition paint

A cationic electrodeposition coating composition which contains a plasticizer is provided, which does not cause poor adhesion with intermediate and top coats, and allows the VOC content to be reduced. The cationic electrodeposition coating composition of the present invention is a cationic electrodeposition coating composition which contains a cationic group-containing epoxy modified base resin, a blocked isocyanate curing agent and a plasticizer, wherein the plasticizer is a propylene oxide oligomer with an average molecular weight of 200 to 1500, contains a primary hydroxyl group on the repeating terminals of the propylene oxide, and contains one or two primary hydroxyl groups and/or primary amino groups in the molecule.

Cationic electrodeposition coating composition containing plasticizer

Cathodic electrodeposition paints of the type in which a cationically modified epoxy resin is crosslinked with a blocked polyisocyanate crosslinker are disclosed. The paint contains a cationically modified epoxy resin having at least one oxazolidone ring in the molecule and a Tg ranging between 0.degree. C. and 35.degree. C., and a blocked alicyclic polyisocyanate. The use of lead based anticorrosive pigments may be eliminated or substantially reduced. When the alicyclic polyisocyanate is a bicycloalkane polyisocyanate, the use of organic solvent may also be reduced.

Cathodic electrodeposition paint

The present invention provides a method for recycling a polymer crosslinked through acyl carbamate bond. Disclosed is a re-crosslinkable composition obtained by adding an alcohol to the polymer crosslinked through acyl carbamate bond and heating.

Re crosslinkable composition and method for recycling using the same

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Osaka-fu, Japan

Makoto Ando