Copolymer, process for its preparation and its use as a sorbent

Details Copolymer, process for its preparation and its use as a sorbent Copolymer, process for its preparation and its use as a sorbent

C - Chemistry, Metallurgy

22

B

402/2, 402/405,

C22B 3/00 (2006.01) B01J 20/26 (2006.01) C08F 226/00 (2006.01) C08F 226/06 (2006.01) C08F 230/06 (2006.01)

Patent

CA 1238445

A B S T R A C T The crosslinked, porous copolymer in the form of beads and containing 50 to 99.9% by weight of recurring units of a heterocyclic 5-membered ring compound which contains a poly- merisable olefinic group and which has at least one protonis- able nitrogen atom in the ring, 0.1 to 50%. by weight of units of a crosslinking agent, 0 to 25% by weight of units of a polymerisable organoboron or organosilicon compound and, rela- tive to 100% by weight of the sum of the abovementioned units, 5 to 350% by weight of units of an N-vinylamide of the general formula I CH2=CH-N(R1)-C(R2)=O wherein R1 denotes hydrogen, methyl or ethyl and R2 denotes hydrogen or C1-C3-alkyl, or several such N-vinylamides and 0 to 40% by weight of units of another polymerisable compound or several such compounds, is prepared by inverted suspension polymerisation and is used, for example, as a sorbent for acid substances from solutions thereof, preferably aqueous solutions.

457984

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