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PROCEDURE FOR OBTAINING ESTERS OF THE POLY- -CYANACRILIC ACID AND ITS DEPOLYMERIZATION
PROCEDURE FOR OBTAINING ESTERS OF THE POLY- -CYANACRILIC ACID AND ITS DEPOLYMERIZATION
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机译:聚氰基丙烯酸酯的酯化及其脱聚过程
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摘要
1. Process for the production of poly-alpha-cyancacrylic acid esters by reacting formaledehyde or compunds releasing formaldehyde with cyanoacetic acid esters of the formula see diagramm : EP0128443,P9,F1 in which R denotes an alkyl, halogenoalkyl, alkoxyalkyl, cycloalkyl, alkenyl or phenyl radical, each having 1-10 C atoms, in the presence of 0.001 to 0.05 mol of basic catalysts, characterized in that the reaction is carried out continuously at temperatures of 50 - 200 degrees C, under a pressure of 1 to 100 bars and with a residence time of less than 20 minutes by continuously introducing the reaction mixture into a reactor, mixing it with a catalyst, passing the mixture through a reaction zone at the reaction temperature and distilling off volatile substances.
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