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

Abstract RU 2323944 C1

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

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RU 2 323 944 C1

Authors

An En Dok

Ledovskikh Gennadij Ivanovich

Balanovskij Nikolaj Vladimirovich

Zorina Ariadna Ivanovna

Roshchin Aleksandr Vasil'Evich

Balashova Galina Leonidovna

Sen'Kov Viktor Alekseevich

Dates

2008-05-10Published

2006-09-21Filed