2,5-bis-(1,2-dibromoalkyl)-1,4-dioxan for - flame-proofing plastics

摘要

2,5-bis-(1,2-dibromoalkyl)-1,4-dioxan for flame-proofing plastics Title cpds. of formula: (where R1, R2, R3, R4 = H or 1-4C alkyl and A1, A2 = 1,2-dobromoalkyl (2-8C), may be prepared pref. by bromination of the corresponding cpd. where A1, A2 = 2-8C vinyl group. - Advantages are high thermal stability, does not discolour the plastic or smell, low concentration 1-4