Daiso Co., Ltd.

Osaka Soda Co., Ltd.

Keishiro Nagao

Hiroyuki Kanesaki

Sadao Takakuwa

Kouji Uegami

Tetsuya Nakada

A polymerizable composition is provided which is constituted by adding isocyanate by 0.1 to 2 equivalent to the alcoholic hydroxyl group in a mixture dissolving component A prescribed below by 20 to 60 parts by weight to a total of 80 to 40 parts by weight of component B and component C in the ratio specified below:

Polymerizable compositions and high refractive plastic lens obtained

Improved process for preparing pyridine-2,3-dicarboxylic acid compounds of the formula: ##STR1## wherein R.sup.1 and R.sup.3 are each H, (un)substituted alkyl, or (un)substituted phenyl; R.sup.2 is H, (un)substituted alkyl, (un)substituted phenyl, alkylthio, alkoxy, (un)substituted phenylthio, (un)substituted phenoxy, halogen, alkoxycarbonyl, aminocarbonyl which may optionally be substituted, or cyano; or both of R.sup.1 and R.sup.2 or both R.sup.2 and R.sup.3 may combined together to form a divalent alkylene; and R.sup.4 and R.sup.5 are each alkyl which are useful as an intermediate for preparing herbicidally effective compounds, which comprises reacting an enone (II) and an aminodiester (III) of the formulae: ##STR2##

Process for preparing pyridine-2,3-dicarboxylic acid compounds

Improved process for the production of 2,3-dichloro-1-propanol in high yield by chlorinating allyl alcohol with chlorine, which is characteristic in that the chlorination reaction proceeds by introducing simultaneously allyl alcohol and chlorine gas and optionally hydrogen chloride gas into the reaction system containing aqueous hydrochloric acid without necessity of extreme cooling and/or pressure.

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Amagasaki, Japan

Keishiro Nagao