| 摘要 |
Anion-exchange resins insoluble in aqueous solutions of acids, bases, and salts are obtained by reacting at a temperature of 140-250 DEG C. a polyamine which contains at least one primary amino group, and a cross-linked copolymer containing 80-99 per cent on a molar basis of a copolymerized ester having the formula CH2= CRCOOR1, in which R is a hydrogen atom or methyl group and R1 is a monovalent hydrocarbon radical containing 1 to 8 carbon atoms, such as the methyl, ethyl, isopropyl, isobutyl, tert.-butyl, n-amyl, sec.-amyl, tert.-amyl, n-octyl, 2-ethylhexyl, and cyclohexyl acrylates and methacrylates, and also containing 1-20 per cent on a molar basis of a copolymerized material containing a plurality of vinylidene groups, such as divinyl benzene, toluene, ethyl benzene, xylene, and naphthalene, trivinyl benzene, and N,N1-methylene bis-acrylamide, the polyamine being present in at least a stoichometrical amount to react by aminolysis with the ester groups of the copolymer. In examples the use of terpolymers of divinyl benzene, ethyl styrene, and acrylate esters is described. Polyamines specified are diethylenetriamine, triethylenetetramine, tetraethylenepentamine, propylenediamine, hydroxyethyldiethylenetriamine, N-aminopropylmorpholine, N-aminoethylmorpholine, and dimethylaminopropylamine. The reaction between the polyamines and copolymers may be carried out under anhydrous conditions or in an organic liquid such as xylene. The copolymers may be prepared in aqueous media in the presence or absence of dispersing agents such as p-diisobutylphenoxy (polyethoxy) ethanol and gelatin, and with the aid of catalysts such as benzoyl, acetyl, lauryl, stearyl, succinyl, and caprylyl peroxides, tert.-butyl hydroperoxide, tert.-butyl perbenzoate, cumene hydroperoxide, and ascaridol. In examples, the preparation of copolymers in bead form is described, and also the use of a proliferous butadiene/styrene seed copolymer to produce a copolymer in popcorn form. |
