| 摘要 |
Fire-retardant tetrabromobisphenol oligomers of the formula: <IMAGE> R or R' is a branched or unbranched alkyl radical; Xi is a halogen, 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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