(A) ;METHOD FOR PURIFYING GLYCIDYL ACRYLIC (METHACRYLIC) ACID

摘要

PURPOSE:To obtain a gas permselective membrane capable of filming by interfacial polymerization by using a copolymer of both polyamine having at least two pieces of amino group shown by a specified formula and the cross-linking agent component having at least two pieces of functional group allowing to react with amino group. CONSTITUTION:A soln. of the following amino compd. e.g. 3-(2-amino ethylaminoproplyl)-tris (trimethylsiloxane)-silane is impregnated into a supporter wherein >=50mol% all polyamines has two or more pieces of primary and/or secondary amino group shown by the formula 1 and/or 2 and thereafter excess soln. is separated. A soln. of multifunctional compd. having two or more pieces of functional group allowing to react with amino group e.g. diphenylmethane diisocyanate is introduced onto the surface of the supporter and both the compds. are allowed to react with each other on the surface of the supporter. The gas permselective composite membrane is obtained by washing the solvent and the nonreacted compd. and drying same.