| 摘要 |
Fire-retardant tetrabromobisphenol oligomers of formula (1), wherein R or R' is a branched or unbranched alkyl radical; Xi is a halogen, preferably Br, wherein i is an integer from 0 to 4; G is a connecting group selected from the group consisting of a single bond, a branched or unbranched divalent aliphatic hydrocarbon radical of from 1 to 10 carbon atoms, oxygen, sulfur, sulfoxide, SO2, or oxygen-, silicon-, sulfur- or nitrogen-containing aliphatic hydrocarbon radicals such as -OR"O-, -OR"OR"O-, -SR"S-, -SR"SR"S-, -OSiR2O-, -OSiR2OSiR2O-, O2C-R"-CO2, CO2-R"-O2C, SO-R"-SO-, SO2-R"-SO2, wherein R" is a divalent aliphatic hydrocarbon radical; A is a branched or unbranched alkyl diradical; and n is 0 or a positive integer. The fire-retardant tetrabromobisphenol oligomers of the present invention are advantageous due to their non-reactive end-caps.
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