1,3-bis(ethenyl)imidazolidin-2-one

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A formulation consisting of 70 kg of cellulose, 20 kg of potassium caseinate and 10 kg of polymer d2) having a content of N-vinylimidazole (Vl) of 90% by weight, a content of N-vinylpyrrolidone (VP) of 7% by weight and a content of N,N′-divinylethyleneurea (DVEU) of 3% by weight was prepared by dissolving the potassium caseinate in 400 l of water at 60° C. and suspending the cellulose therein. The suspension was atomized at 185° C. at 70 bar via a single-component nozzle and the polymer was injected into the atomization zone. was atomized at 185° C. at 70 bar via a single-component nozzle

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 4 parts of N-vinylpyrrolidone, 0.1 part of N,N'-divinylethyleneurea (DVEU), 50 parts of water and 0.5 part of 5% strength sodium hydroxide solution was placed in a stirred vessel and heated to 60° C. in a stream of nitrogen. 0.01 part of sodium dithionite was added and the mixture was stirred at 70° C. for 1 h. A suspension was obtained into which a solution of 37 parts of N-vinylimidazole and 1.2 parts of DVEU in 50 parts of water was metered over a period of 3 hours. The mixture was subsequently polymerized at 70° C. for 2 hours. The product was worked up by washing on a suction filter, rinsing with water and drying at 60° C. in a convection oven, to give fine white particles in a yield of 95%. was placed in a stirred vessel