Abstract: The present invention provides an optical polymerizable composition, an optical composition, a large-area window, a polyisocyanate composition, and eyeglass lens and producing method thereof. The optical polymerizable composition is composed of a polythiol compound and a polyisocyanate compound, and a urethane-based optical lens obtained by reacting the compounds has a low specific gravity and thus is lightweight, and has excellent heat resistance, and particularly, problems of degradation in impact resistance which appear after hard-multi coating are solved. The lens produced using the composition has various excellent optical characteristics including workability such as formability and dyeability, transparency and the like.

Abstract: The present invention relates to a method for preparing amicarbazone by using amino-triazolinone, which is an intermediate compound, and relates to a method for preparing amicarbazone, comprising the steps of: obtaining hydrazine carboxylic acid represented by 5 chemical formula (V) by reacting acylhydrazide represented by chemical formula (II) and a carbamating agent represented by chemical formula (III) or (IV); reacting the obtained hydrazine carboxylic acid represented by chemical formula (V) and hydrazine hydrate in the presence of a base catalyst; and reacting the obtained compound represented by chemical formula (I) 10 and an alkyl isocyanate represented by chemical formula (IV) in the presence of a base catalyst. Amino-triazolinone and amicarbazone would be stably produced by the present invention without safety gear and safety facilities for the leakage of phosgene, which has been conventionally used as a reactant.

Abstract: The present invention relates to a method for preparing an amino-triazolinone which can be used as a raw material for amicarbazone and has chemical formula (I). The method for preparing the amino-triazolinone includes the steps of: reacting an acyl hydrazide of chemical formula (II) with a carbamating agent of chemical formula (III) or (IV) so as to obtain a hydrazine carboxylic acid of chemical formula (V); and reacting the thus-obtained hydrazine carboxylic acid of chemical formula (V) with a hydrazine hydrate under the presence of a base catalyst. According to the present invention, the amino-triazolinone may be stably prepared without using safety equipment or safety facilities for a possible leakage of phosgene, which has been used as a conventional reactant.

Abstract: The present invention relates to a method for preparing an amino-triazolinone which can be used as a raw material for amicarbazone and has chemical formula (I). The method for preparing the amino-triazolinone includes the steps of: reacting an acyl hydrazide of chemical formula (II) with a carbamating agent of chemical formula (III) or (IV) so as to obtain a hydrazine carboxylic acid of chemical formula (V); and reacting the thus-obtained hydrazine carboxylic acid of chemical formula (V) with a hydrazine hydrate under the presence of a base catalyst. According to the present invention, the amino-triazolinone may be stably prepared without using safety equipment or safety facilities for a possible leakage of phosgene, which has been used as a conventional reactant.