摘要:
The present invention provides an aqueous solution of an epoxy resin and a solid thereof, which is obtained by the following manner that an epoxy compound or a solution of the epoxy compound in organic solvent, and an amine compound of the formula (1), an aqueous solution thereof, a solution of the amine compound in organic solvent, or a solution thereof in a mixture of water and organic solvent, are mixed together so that the epoxy compound and the amine compound are reacted or polymerized to obtain a solution of an epoxy resin, to which water is added and heated to remove the organic solvent and unreacted amine compound, and a process for preparing the same NH2N(R1)(R2) (1) wherein R1 and R2 are the same or different and each is alkyl having 1 to 6 carbon atoms, alkylene having 2 to 11 carbon atoms or a group represented by —R3—N(R4)—R5— which are formed when both are bonded, R3 and R5 are the same or different and each is alkylene having 1 to 6 carbon atoms, and R4 is alkyl having 1 to 6 carbon atoms or amino group.
摘要:
A curing agent for epoxy resin which comprises at least one selected from the compound of the formula (1) and its salt, as an effective component wherein X is —(CH2)n- or —(CH2)1-Y—(CH2)m- , Y is —N(R1)—, —O— or —S—, R1 is alkyl having 1 to 8 carbon atoms or amino. n is a number of 2, 3, 5 to 11, 1 and m are each a number of 1 to 8.
摘要:
A method for producing electrolytic manganese dioxide is disclosed, comprising the electrolysis of a slurry of particles of manganese oxides in an aqueous solution of manganese sulfate. The concentration of the particles of manganese oxides is 0.01 to 0.4 grams per liter of the solution.
摘要:
1-Aminopyrrolidine which is obtained by reacting hydrazine hydrate with a compound represented by the following formula (I):X.sup.1 --C.sub.4 H.sub.8 --X.sup.2 (I)wherein X.sup.1 and X.sup.2 are the same or different, and each represents a leaving group, in methanol; and a process for producing 1-aminopyrrolidine, comprising the step of reacting hydrazine hydrate with the above compound represented by formula (I) in methanol.