METHOD FOR PREPARATION OF LOW-BASIC ANIONITES Russian patent published in 2008 - IPC C08F212/36 C08F220/44 C08F8/32 C08L35/06 

FIELD: CHEMISTRY.

SUBSTANCE: method for preparation of low-basic anionites by suspension copolymerisation of acrylonitrile, methylmethacrylate in amount of З-5 wt.%, content of technical grade divinylbenzene being 9-15 wt.% and concentration thereof being 50-60%, in the presence of benzoperoxide in amount of 3.0 wt.% and blowing agent (alkylbenzine, aviation kerosene, decane) in amount of 40 vol.% as regards to monomer volume in suspension media, which consists of water, 25% of sodium chloride or ammonium chloride and 1.5-2.0% of potato starch, when heated at 50°С for 1 hour, at 61-65°С for 4 hours, at 70°С for 2 hours, at 80°С for 1 hour, followed by amination with diethylenetriamine at 130-145°С for 10 hours in the presence of 1.0-1.5% of element sulphur used as a catalyst.

EFFECT: provides for high osmotic stability and high resistance to organic poisoning.

1 cl, 9 ex