Flame-resistant polycarbonates containing units deriving...

Details Flame-resistant polycarbonates containing units deriving... Flame-resistant polycarbonates containing units deriving...

C - Chemistry, Metallurgy

08

G

402/178

C08G 63/64 (2006.01) C08G 64/10 (2006.01)

Patent

CA 2004411

CASE 2958 "FLAME-RESISTANT POLYCARBONATES CONTAINING UNITS DERIVING FROM HALOGENATED CARBONYL COMPOUNDS IN THEIR POLYMER CHAIN." ABSTRACT Flame-resistant thermoplastic branched polycarbonates of high molecular weight are prepared from: (1) a carbonate precursor; (2) at least one dihydroxyaromatic compound of formula: (I) Image where: R is a single bond, or a substituted or non-substituted linear or branched C1-C5 alkylene radical, or a group chosen from O,S,SO2 and CO; X and Y, which may be the same or different, are H or CH3; m and n, which may be the same or different, are whole numbers from 1 to 4; (3) at least one halogenated carboryl compound of formula: Image I I -2- where: Z is a group chosen from O,S and NH; R1 and R2, which may be the same or different, are chlorine or bromine; R is hydrogen or chlorine or bromine or a C1-C3 alkyl radical; p is zero or 1 or 2

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