| 摘要 |
Resinous products are obtained by condensing epichlorhydrin and one or more alkylene polyamines in the ratio of at least 2 mols. of epichlorhydrin to one of polyamine, permitting the condensate to gel, curing the gel by heating and, if desired, granulating the gel, which may then be used for anion exchange. Polyamines specified are ethylene diamine, diethylene triamine, triethylene tetramine, and higher members of that series, including higher polyethylene polyamine mixtures, 1,3-diaminopropane, 1,3- or 1,4-diamino-n-butane, 1,5-diaminopentane, 1,6-diamino-n-hexane, 1,6-diamino - 3 - methyl - n - hexane, 1,10 - diamino-n-decane, and di-(3-aminopropyl)-amine. Strong alkali, preferably in a molar ratio to epichlorhydrin of 1 : 10 to 1 : 1 may be present; alkalis specified are sodium, potassium, lithium, and calcium hydroxides, and sodium and potassium carbonates. The condensation may be carried out in a solvent inert to the reactants, e.g. water, methanol, ethanol, and mono-methyl- or monoethyl-ethers of ethylene glycol. Preferably the epichlorhydrin is added slowly to the polyamine, with cooling. The preparation of the resins is illustrated by numerous examples of which examples 1, 3-9 describe the reaction of epichlorhydrin and tetrethylene pentamine in various proportions in presence of water and sodium hydroxide; example 2 describes the reaction in absence of sodium hydroxide, while in examples 11-20 diethylene triamine, di-(3-aminopropyl)-amine, a polyethylene polyamine mixture, trimethylene dibromide, ethylene dichloride, ethylene diamine, are substituted for the ethylene pentamine; in example 1, 1890 parts tetraethylene pentamine are mixed with 5500 parts water, while cooling to 3 DEG C. and 2776 parts epichlorhydrin are added slowly over 30-70 minutes with continuous agitation. The syrup is allowed to warm to room temperatures and 200 parts sodium hydroxide dissolved in water is added gradually. The gel formed on warming is broken into pieces and cured in an oven at 95-105 DEG C. for 17-18 hours. The Specification as open to inspection under Sect. 91 stated that other a -chloro-b : g -epoxy compounds might be used as reactants. This subject-matter does not appear in the Specification. |
