BROMINE - CONTAINING POLYURETHANE IONOMERS

Polyurethane ionomers with reduced flammability were obtained by incor porating a brominated chain extender (dibromoneophentyl glycol - DBNPG ) into the ionomers based on isophoronediisocyanate, polyoxytetramethy lene glycol and 2,2-bis(hydroxymethyl)propionic acid. To examine the i nfluence of brominated diol on the characteristics of the synthesized polymers, model polyurethane compounds containing various amounts of b rominated and nonbrominated chain extenders (1,4-butanediol and neopen thyl glycol) were prepared, as well. The products were studied by FTIR , DSC and TGA methods. Hydrolytic stability of the ionomers in water w as controlled by FTIR; their flammability was examined by oxygen index measurements.