C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/178, 260/263
C08G 64/00 (2006.01) C07D 239/34 (2006.01) C07D 239/38 (2006.01) C07D 239/42 (2006.01) C08G 64/04 (2006.01) C08G 64/12 (2006.01)
Patent
CA 2004306
CASE 2956 "FLAME-RESISTANT POLYCARBONATES CONTAINING UNITS DERIVING FROM HALOGENATED PYRIMIDINE 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: Image (I) 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; - 2 - (3) at last one halogenated pyrimidine compound of formula: Image II where: R2, R3, R4, which may be the same or different, are chlorine or bromine or hydrogen, on condition that at least one is chlorine or bromine; R1 is chlorine or bromine, or a radical of formula: Image III where Z is NH or S or O; (4) at least one polyfunctional organic compound as branching agent, characterised by possessing at least three equal or different groups chosen from the groups OH, COOH, COC1 and SO2C1.
Enichem Tecnoresine S.p.a.
Petri Alberto
Robic Robic & Associes/associates
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