Ube Industries, Inc.

Taku Nakamura

Akio Matsushita

Kiyotaka Yoshii

Masayoshi Oue

Shuji Yamada

Katsumasa Harada

Noriaki Iwase

Masahiro Naiki

Takafumi Hirakawa

Atsushi Morikami

Katsuhiko Mizutare

Fumio Adachi

Manabu Takahashi

Ken Ikuno

Disclosed is an aqueous polyurethane resin dispersion which comprises a polyurethane resin which is obtained by reacting (A) a polyurethane prepolymer obtained by reacting (a) a polycarbonate polyol having an alicyclic structure in the main chain, (b) an acidic group-containing polyol compound and (d) a polyisocyanate, and (B) a chain-elongating agent, being dispersed in an aqueous medium, a carboxylic acid group content of the above-mentioned (A) polyurethane prepolymer based on a solid component of (A) the polyurethane prepolymer is 2.0 to 13.0% by weight, and a number of a hydroxyl equivalent of a mixture of the above-mentioned (a) polycarbonate polyol having an alicyclic structure in the main chain, the above-mentioned (b) acidic group-containing polyol compound, and, if necessary, (c) a polyol other than (a) and (b) is 70 to 270.

Aqueous polyurethane resin dispersion, preparation method of the same, and coating composition containing the same

The present invention relates to a process for preparing a &#x3b2;-oxonitrile compound or an alkali metal salt thereof which comprises reacting a carboxylic ester represented by the formula (1):RCOR&#x2003;&#x2003;(1) 

Process for producing &#x3b2;-oxonitrile compound or alkali metal salt thereof

Process for producing 2-substituted thiopyrimidine-4-carboxylate

Disclosed is a method for preparing 2-mercaptothiazole, which comprises adding a dithiocarbamate salt represented by the formula (1): ##STR1## wherein M is a cation, to a chloroacetaldehyde solution in the presence of an acid.

Method for preparing 2-mercaptothiazole

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Ube, Japan

Taku Nakamura