Patent ID: 6927297
Filing Date: 2005-08-09
Classification: C08G

Abstract:
1. A process for reducing the monomeric aziridine content in a polyaziridine forming reaction mixture comprising aziridines and acrylates, the process comprising adding to the polyaziridine forming reaction mixture an excess of an organic carbonate scavenger according to the formula R′ and R″ independently represent alkyl, aryl, alkaryl, or aralkyl group containing up to about 20 carbon atoms where optionally, R′ and R″ together with the two oxygen atoms and the carbon atom in the carbonate group can form a heterocyclic ring, and wherein when a heterocyclic ring is formed the organic carbonate scavenger is 1,3-dioxolan-2-one or 4-methyl-1,3-dioxolan-2-one, and wherein the excess is based on the equivalent ratio of organic carbonate scavenger to monomeric aziridine.